RPi Expansion Boards by Manufacturer

RasPiComm
The RasPiComm by Amescon is a piggyback-mountable extension board and offers:

with driver support. Fully compatible with the B+!
 * RS-485
 * RS-232
 * RTC
 * direct I2C connector
 * 5-way joystick

More information: Technical Specifications.

RasPiComm+


The RasPiComm+ by Amescon is a modular extension board for the Raspberry Pi and offers:


 * 4 module slots for a wide range of modules (RS-232, RS-485 4 Wire, GSM, GPS, 1Wire, CAN, 8 Input, 8 Output, 16 isolated I/O, Profibus,...)
 * RTC
 * easy to set up
 * full driver support
 * industrial version for isolated 24V available

The RasPiComm+ will be launched Q1 2015. If you want to have it before the official launch, you can support the Indiegogo campaign.

Ardhat
Ardhat is a HAT compliant Smart Power, Robotics and IoT Platform for the Raspberry Pi

Hardware Features


 * Integrated 16MHz Arduino compatible processor
 * Accepts 5V Arduino shields, but also available with long -tail HAT header pins for HAT expansion.
 * 12 ch PWM O/P, 6 ch analog I/P
 * Real-time Clock
 * External 8-28V power input
 * High Power 3A 5V O/P
 * Full BBU/UPS
 * 10-DOF Sensor Fusion
 * Long Range Wireless Mesh up to 15km
 * Built-in 2050mAH battery
 * Barometer
 * Thermometer
 * Programmable Power/Navigation combo switch
 * ‘Zero CPU’ SmartLED driver
 * Ext and LiPo voltage monitors
 * Charge status & programmable LEDS
 * Programmable wakeup/watchdog
 * > 1,000 hour sleep mode operation
 * Fully RPi HAT standard compliant (with EEPROM)
 * Standard LiPo battery connector
 * Uses standard Arduino IDE
 * PiBow 'TopHat' available to provide physical protection
 * HAT compliant device-tree EEPROM

Software

The preferred environment for programming Ardhat is javascript, using node.js with Johnny Five, though Python and C/C++ bindings are also available, see Ardhat Github.

The Ardhat Real-Time is supplied as a preloaded sketch that includes a co-operative multitasking scheduler and utility functions, which can be modified as required using the Arduino IDE. It uses ~2kB of Arduino program space.

The basic functions include:


 * Internal & external supply voltage monitoring
 * Sensor Fusion monitoring
 * Power/Navigation switch monitoring
 * Real-time clock monitoring
 * Status reporting to Raspberry Pi over Firmata
 * Raspberry Pi status monitoring
 * Sleep/Power Down Management
 * Wakeup scheduling

RaspBee
The RaspBee is an expansion board which brings ZigBee connectivity to the Raspberry Pi. The shield allows direct communication with ZigBee PRO devices like Philips Hue, XBee Series 2 and others.

Key Features:
 * powered by Atmels ATmega256RFR2 (8-Bit AVR, 256 kB Flash, integrated RF transceiver)
 * 500m signal range (power amplified)
 * preflashed ZigBee firmware
 * also supports custom firmware via bootloader
 * extensive software package available

1-Wire Pi
The 1 Wire Pi from AB Electronics is a communication board supporting the 1-Wire® protocol. A 5V buffered I2C port is also provided on the board.

1-Wire Pi Plus
The 1 Wire Pi Plus from AB Electronics UK is a communication board supporting the 1-Wire® protocol. Designed for the Raspberry Pi A+, B+ and Raspberry Pi 2. A 5V buffered I2C port is also provided on the board.

ADC Pi - Raspberry Pi Analogue to Digital converter
The ADC Pi V2.1 is an 8 channel 17 bit analogue to digital converter designed to work with the Raspberry Pi platform. The ADC Pi V2.1 is based on two Microchip MCP3424 A/D converters each containing 4 analogue inputs with up to 18 bit resolution.

ADC Pi Plus - Raspberry Pi Analogue to Digital converter
The ADC Pi Plus is an 8 channel 17 bit analogue to digital converter designed for the Raspberry Pi A+, B+ and Raspberry Pi 2. . The ADC Pi Plus is based on two Microchip MCP3424 A/D converters each containing 4 analogue inputs with up to 18 bit resolution.

ADC DAC Pi - 12 bit 2 channel ADC and DAC
The ADCDAC Pi is a 2 channel 12 bit analogue to digital converter and 2 channel 12 bit digital to analogue converter designed to work with the Raspberry Pi platform.

Breakout Pi - Prototyping board
The Breakout Pi is a useful and versatile prototyping expansion board for the Raspberry Pi models A and B.

Breakout Pi Plus - Prototyping board
The Breakout Pi Plus is a useful and versatile prototyping expansion board designed for the Raspberry Pi A+, B+ and Raspberry Pi 2.

Com Pi RS232 Serial and 1-Wire
The Com Pi from AB Electronics is a communication board supporting RS232 and 1-Wire® protocols. A 5V buffered I2C port is also provided on the board.

Delta-Sigma Pi 18 bit Analogue to Digital converter
The Delta-Sigma Pi is an 8 channel analogue to digital converter designed for use on the Raspberry Pi computer platform. The board is based around the MCP3424 low noise and high accuracy 18 bit delta-sigma analogue to digital converter from Microchip Technology Inc. A pair of MCP3424 converters are included on the board along with an I2C buffer interface allowing you to connect additional 5V I2C devices to the same bus.

IO Pi 32 Channel Port Expander
The IO Pi is a 32 channel digital expansion board designed for use on the Raspberry Pi computer platform. The board is based around the MCP23017 16-bit I/O expander from Microchip Technology Inc. A pair of MCP23017 expanders are included on the board allowing you to connect up to 32 digital inputs or outputs to the Raspberry Pi.

IO Pi Plus 32 Channel Port Expander
The IO Pi Plus is a 32 channel digital expansion board designed for the Raspberry Pi A+, B+ and Raspberry Pi 2. The board is based around the MCP23017 16-bit I/O expander from Microchip Technology Inc. A pair of MCP23017 expanders are included on the board allowing you to connect up to 32 digital inputs or outputs to the Raspberry Pi.

Raspberry Pi Plus Adapter Kit
The Raspberry Pi Plus Adapter Kit allows you to connect expansion boards designed for the original Raspberry Pi models A and B onto your new Raspberry Pi A+, Raspberry Pi B+ and Raspberry Pi 2 Model B. The adapter board includes mounting holes for both the Raspberry Pi and the expansion board allowing you to securely fit your expansion boards onto the Raspberry Pi.

Raspberry Pi B+ Breakout Kit
The Raspberry Pi B+ Breakout is an easy to assemble breakout board to use with the Raspberry Pi model B+

RTC Pi Real time Clock Module
The RTC Pi is a real time clock module which connects via the GPIO port on a Raspberry Pi.

RTC Pi Plus Real time Clock Module
The RTC Pi Plus is a real time clock module which connects via the GPIO port on a Raspberry Pi. Designed for the Raspberry Pi A+, B+ and Raspberry Pi 2.

Serial Pi - RS232 serial interface
The Serial Pi is a stackable communication board supporting the RS232 serial protocol.

Serial Pi Plus - RS232 serial interface
The Serial Pi Plus is a stackable communication board supporting the RS232 serial protocol. Designed for the Raspberry Pi A+, B+ and Raspberry Pi 2.

Servo Pi - PWM servo controller
The Servo Pi is a 16-channel, 12-bit PWM controller suitable for driving LEDs and radio control servos.

AdvaBoard RPi1
The AdvaBoard RPi1 is a multifunctional extension-board, which contains:


 * TFT-display-interface (3.2" 320x240, 5" 800x480, 7" 800x480)
 * touchscreen interface
 * real-time-clock (RTC)
 * CPLD + a microcontroller
 * all I/Os are 5V-tolerant, except I2C
 * analog-I/Os (4* 16bit inputs, 2* 8bit outputs)
 * separate connectors for all interfaces (I2C, SPI, digital/analog-I/O, RS-232, RS-485 incl. pluggable terminator)
 * power-management: battery-backed RPC/I2C-interfaces, power-down, power-up on time or event, separately powered peripherals
 * JTAG-programmer for Xilinx CPLDs/FPGAs, C2-programmer for SiLabs C8051F*
 * Software (C + Python 2.6/3.x libraries, free example programs)

Details can be found at www.advamation.com/products/embeddedpc/advaboard.html.

More boards (e.g. additional displays, I/Os, motors, sensors etc.), which can be connected to the Raspberry Pi and/or the AdvaBoard RPi1 will also be available soon.

Pi Supply - Pi Cocktails
The following add on boards will shortly be available from Pi Supply and are based on the Pi Cocktail series of boards explored in The MagPi magazine. More details to follow soon.

Pi 8 LED & 8 Button
Pi 8 LED & 8 Button interface board for Raspberry Pi.

Perfect way to learn how to use the GPIO pins. Plugs directly into the Raspberry Pi GPIO connector. (P1 header) Has eight bright green LED's and eight momentary switches. For a more detailed description see: http://mypishop.com/Pi%208%20LED%20&%208%20Button.html

Stepper Motor Controller Board
Pi Stepper Motor Controller interface board for Raspberry Pi.

The stepper board uses 8 GPIO pins to drive up to two stepper motors. (One stepper motor is included in the kit) Plugs directly into the Raspberry Pi GPIO connector. (P1 header) The board can use the 5 VDC provided by the Raspberry Pi or you can optionally provide your own source voltage to drive the motors. This board includes a ULN2803 8 Channel Darlington Driver and can be used to control other higher current devices such as relay boards, etc. For a more detailed description see: http://mypishop.com/Stepper.html

Read Your Pi !(LCD Interface Board)
Read Your Pi (LCD) interface board for Raspberry Pi.

Available kits with 20x4 LCD display or 16x2 LCD display. The interface board uses the GPIO pins display characters on a LCD display. Plugs directly into the Raspberry Pi GPIO connector. (P1 header) For a more detailed description see: http://mypishop.com/Read%20Your%20Pi%20!.html

Protect Your Pi ! (16 or 32 IO Expansion Kit)
Protect Your Pi (LCD) interface board for Raspberry Pi.

Available kits with 16 or 32 GPIO expansion pins. The expansion board uses the I2C bus on the Raspberry Pi to provide up to 32 additional GPIO pins. Plugs directly into the Raspberry Pi GPIO connector. (P1 header) For a more detailed description see: http://mypishop.com

Pi MATRIX ! 8X8 LED Matrix with 16 bit I/O !
Pi MATRIX ! 8X8 LED Matrix with 16 bit I/O kit for the Raspberry Pi.

HUGE 8X8 LED MATRIX Plugs directly into the Raspberry Pi GPIO connector. (P1 header) Take the display off and use it for 16 bits of I/O For a more detailed description see: http://mypishop.com

Pi Droid Alpha Educational Robot Controller
Pi Droid Alpha Educational Robot Controller Raspberry Pi expansion board from Mikronauts

Pi Droid Alpha adds:

- eight FlexIO Servo/PWM/IO headers

- sixteen digital input/outputs

- eight analog inputs

- a dual h-bridge motor driver

to Raspberry Pi.

RoboPi Advanced Robot Controller
RoboPi Advanced Robot Controller Raspberry Pi expansion board from Mikronauts

RoboPi adds:

- eight-core 32-bit microcontroller running at 100Mhz

- 24x FlexIO Servo/PWM/io

- 8x 12 bit analog inputs

- easy to use C and Python RoboPi API

to the Raspberry Pi in order to off-load hard real time I/O and allow more precise timing than Linux running on the Pi allows.

Pi Rtc Dio Gold Real Time Clock + Digital I/O expander
Mikronauts Pi Rtc Dio Real Time Clock & I/O Expansion Board

Pi Rtc Dio Gold adds:

- Real Time Clock

- 3v3 power supply

- 32 bits digital I/O

- prototyping area

Pi Rtc Dio stacks on top of the Raspberry Pi and was designed by Mikronauts to make building one-off expansion circuits easier for everyone. Pi Rtc Dio also has a four pin I2C expansion header, and a five pin COM connector for future expansion.

Pi Rtc Dio Silver Digital I/O expander
Mikronauts Pi Rtc Dio Real Time Clock & I/O Expansion Board that stacks on top of the Raspberry Pi and was designed by Mikronauts to add 32 digital I/O's and 3.3v power supply making one-off expansion circuits easier for everyone. Pi Rtc Dio also has a four pin I2C expansion header, and a five pin COM connector for future expansion.

Pi Jumper & Pi Jumper Plus Breakout with 3v3 and 5v I2C
Pi Jumper is the ultimate Raspberry Pi breakout board from Mikronauts

Pi Jumper adds:

- clearly labelled breakout of the 26 pin GPIO connector

- 3v3 power supply for your breadboard circuits

- 3v3 I2C expansion connector

- 5v I2C expansion connector

Pi Jumper Plus provides an IDC jumper cable instead of the stacking header so that you can plug Pi Jumper Plus right into a solderless breadboard.

SchoolBoard ][ develpoment board with LED's & Switches
SchoolBoard[ 8xLED's, 8xDipSw, 8xPushButton, large solderless bread board for education from Mikronauts

SchoolBoard ][ adds:

- 8x LED's with current limiting resistors

- 8x slide switches with current limiting resistors

- 8x tactile push buttons with current limiting resistors

SchoolBoard ][ was designed to work with any single board computer or other development board.

EZasPi prototyping board, stacks on TOP of Pi rev.1/2
EZasPi prototyping board for rev.1 or rev.2 Raspberry Pi, with stacking header and mounting hardware

EZasPi adds:

- Raspberry Pi GPIO 26 connector labeled on both sides

- 3v3 4 pin I2C expansion connector

- 3v3 5 pin TTL level serial port connection

- extra large prototyping area

- mounting holes compatible with rev.2 Model A & Model B

- works with 26 & 40 pin Raspberry Pi, Banana Pi, Odroid C1, MIPS CI20 and more

EZasPi (B) prototyping board, stacks on UNDER Pi rev.2
EZasPi (B) prototyping board for the rev.2 Raspberry Pi, with stacking header and mounting hardware

Both boards are silk screened to indicate signal busing, are designed to accommodate screw terminals, and have an I2C expansion header footprint. EZasPi also has a COM expansion header footprint.

OssoPI (Relay and digital inputs)
OssoPI is an expansion board featuring 8x 277V @ 10A relays + 8x digital (opto or non-opto isolated) inputs on standard dimensions for 9 unit DIN rail enclosure

Rasky (KVM over IP)
Rasky is an expansion board for raspberry pi model 2B to use the rpi as a KVM over IP. It features VGA video acquisition, 2 250VAC 10A relays, 2 digital opto-isolated digital inputs, keyboard, mouse and remote storage emulation over USB, power management using 4 Ni-MH rechargeable AA batteries to assure rpi clean shutdown in case of power loss/failure.

It is actually in crowdfunding, but production will go on no matter how the campaign will end, the price anyway will change depending on the campaign success. Estimated delivery for the first batch is Q2 2016, it will be available both as a kit and ready to use. All developement, both for hw and sw, is completely open source.

SafePI
SafePI is an fully open hardware expansion board for raspberry pi model 1B+, 2, 3 providing power supply protection and safe shutdown by using 4 common available AA rechargeable Ni-MH batteries.

Features
 * It notify the Raspberry when primary power is absent on a configurable GpIO (pin 36 or 38) and then give enough time to shutdown from the batteries.
 * When the RPi is on and the primary power is connected, it recharge the batteries.
 * It provide safe voltage regulator giving the ability to power the RPi from 7V to 25V.
 * Battery drain when switched off if minimal (less than 10mA/h)
 * optionally stackable with other expansion boards (need the right pin header mounted!)
 * It uses 4x commonly available (and low cost) AA Ni-MH batteries
 * Very long life battery duration: they are used only when the primary power fail
 * Open Source design (GPL licensed)

Sources and schematics available from SafePI gitlab repository

3Bpi - Three Branch Pi
set05_08 aka 3Bpi translates bidirectionally inputs/outputs of the Raspberry Pi's GPIO from 3.3V to 5V TTL levels. It has three external ports to connect electronics.cat open source hardware boards. This board takes advantage of P5's Raspberry Pi, with access to a second I2C channel (I2C_0, it can be used without camera connected) and CTS and RTS for hardware flow control in serial communications. Two of 3Bpi's ports, P3 and P4, can be used as 8 bit input/output or I2C and/or SPI ports. One port, P2, is thought for serial communications and Raspberry Pi can be set as master or slave setting the jumpers properly.

Relays Board
set05_02 is a 4 relays board to be connected to 3Bpi. It can be expanded to another 4 relays board or an input board

Input Board
set05_02 is a 4 inputs board to be connected to 3Bpi. It can be expanded to another 4 inputs board or a 4 relays board

LEDs + microswitch
set01_04 is a universal 8 bit inputs (microswitch) / outputs (LEDs) to be connected to 3Bpi. Each bit is set as input or output through jumpers position.

Digital Input / Output I2C expander
set03_03 expands 16 inputs/outputs using TWI (I2C) to be connected to 3Bpi. Each board has two PCF8574. The lower bit is forced to a low level hardware (chip 1 A0 = 0 and chip 2 A0 = 1). Addresses A1 and A2 are set through SMD microswitch (SW1). The jumpers can notify if there is any change when reading, avoiding a constant reading of I2C bus. P1 and P2 connectors are designed to be connected in daisy chain up to four set03_03 boards (64 inputs / outputs).

RS232 to TTL converter
set01_03 translates RS232 signals to TTL to be connected to P2's 3Bpi serial communication port.

USB - RS232 TTL / I2C translator
set01_05 has three functions : 1st) translating USB to TTL Tx and Rx to be connected to 3Bpi, 2nd) converting USB to I2C and 3rd) supplying voltage to next board (it is not for 3Bpi) if jumper is between positions 1 and 2.

uC Atmega
set01_01 is a microcontroller board with two 8-bit ports of inputs/outputs and one serial communication port. It is useful when it is needed to implement some real time application. It can be connected to 3Bpi using any port. Usually through serial communication port.

RemotePi Board
The RemotePi Board is an intelligent infrared remote controlled power switch add-on board for the Raspberry Pi2, B, B+, A+. It allows to switch power on and off using any button (configurable in learning mode) of an existing standard IR remote. Power is only cut after notifying the OS and giving it time to shut-down. It is mainly intended to remote control (using LIRC) and power off/on a mediacenter system. i.e OpenELEC, Raspbmc, XBian, RasPlex, Raspbian. The board is compatible to simple GPIO IR receiver and piggy backs onto the Raspberry Pi, no soldering required. For more information click here.

USB Hub Zero
The USB Hub Zero is a USB hub designed for the Raspberry Pi Zero. Having the same footprint, it is mounted under the Pi Zero and can be powered from the Pi Zero.

DTronixs
You can get these boards at tindie.com in the DTronixs store

MiniPiio L293D
MiniPiio L293D is a small (50x40mm) add-on board which provides a dual H-Bridge DC-Motor circuit using the venerable L293D chip.

MiniPiio Relay2
MiniPiio Relay2 is a small (50x40mm) add-on board which provides a two 1A DPCO Relays. Each relay has a set of screw terminals for easy wiring.

MiniPiio DIO16
MiniPiio DIO16 is a small (50x40mm) add-on board which provides an additional 16-channels of Digital Input/Outputs for the RPi. It can use either a MCP23S17 (SPI) or MCP23017 (I2C) Port Expander.

MiniPiio RS232
MiniPiio RS232 is a small (50x40mm) add-on board which provides a basic RS232 to TTL interface for the RPi. It uses a 3.3V MAX3232 to provide the RS232 interface.

MiniPiio ULN2803
MiniPiio ULN2803 is a small(50x40mm) add-on board which connects a ULN2803 Darlington Driver chip to the RPi's GPIO allowing the RPi to control electronic circuits which require more current to drive them.

RPi MIDI Breakout Board
RPi MIDI Breakout Board is a simple MIDI breakout board for the Raspberry Pi using the hardware UART from the RPi's expansion interface.

RPi Protoboard SM
RPi Protoboard SM is a simple prototype board for the Raspberry Pi. Here is another link to the same project.

RPi "UserPort"
RPi UserPort is a digital and analogue I/O board for the Raspberry Pi. UserPort replicates the original BBC Micros digital User Port and Analogue Port but uses more modern components such as the MCP23S17 16-ch GPIO and MCP3204 4-ch 12-bit ADC.

PiStorms
PiStorms board from mindsensors.com fits over the GPIO pins of Raspberry Pi, and it can control LEGO Mindstorms motors and sensors. This board has integrated touch screen LCD with browser to start/stop your programs. Users can program it in Python or Scratch.

PiServoController
PiServoController board from OpenElectrons.com fits over the GPIO pins of Raspberry Pi, and it can control upto 6 servos from Raspberry Pi. It has i2c interface to control i2c devices. This board provides power stabilization for Raspberry Pi, so that any power fluctuations won't cause RPi to reset. It also provides signal buffering so that you can connect higher voltage servos to the board. For Servo control, it uses Open Source Software, ServoBlaster. Users can program the servo control in Python.

PiPan
PiPan is a Pan/Tilt Kit for PiCamera designed by OpenElectrons.com. Pi-Pan provides Pan and tilt movements for your Raspberry Pi Camera, using two servos for X and Y axis movements. The kit includes servos, mounting hardware and PiServoController board to control servo movements. Users can program the servo control/camera movements, etc. in Python. There also is a light that can be fitted in front of the PiCamera to illuminate subjects, PiLight.

PiConsole
PiConsole is a Bluetooth Console adapter designed by OpenElectrons.com. You can use this to access the console of your Pi on a smartphone or tablet, making it very convenient to use RPi outddoors. There are two models, using Bluetooth 2.1 technology and Bluetooth 4.0 (BLE) technology. They also come in the form of a kit, which includes a pass-through header, in case you want to attach other devices on the GPIO header.

Pi&Bash>_
Pi&Bash>_ Multifunction GPIO Boards for Raspberry Pi

Pi&Bash>_ The One-Stop Raspberry Pi Add-On Board
The Pi&Bash>_ is a new add-on board for the brilliant Raspberry Pi single board computer, designed for anyone who wants to get their Raspberry Pi to interact with the outside world. There are already many add-on boards available, but this one is different, since it offers far more flexibility to the user. Most add-on boards will let the user learn some new programming skills by introducing a new function, such as digital I/Os, or a display, or some analogue inputs, but the Pi&Bash>_ gives the users all this and more on a single compact board.

The beauty of having all these functions on the one board, means that the user is not limited by the constraints of the add-on board, and when they are ready to take the next step and use a new function, they can do so without delay. This is a very powerful motivation for anyone learning to program, as the functions of the board continually inspire the learner.

The Pi&Bash>_ comes with the following functions/interfaces:


 * Traffic Light LEDs
 * 5 Push Button Switches
 * Liquid Crystal Display (LCD) with 2 lines of 16 characters
 * Software switchable LCD backlight
 * Thermometer
 * 8 configurable digital inputs/outputs (I/Os)
 * 8 analogue inputs
 * Header for connecting additional I2C devices
 * Can be powered from external 5V supply

Pi-Plates.com
Stackable expansion boards that allow you to control the world with a Raspberry Pi.

DAQCplate
The Pi-Plates DAQC (DAC-SEE) adds a rich set of input/output options to your Raspberry Pi. It includes 7 powerful digital outputs for driving external devices such as relays and high current LEDs as well as 8 analog to digital inputs for measuring temperature, voltage, humidity and more. In addition there are eight digital inputs, two analog outputs, and seven general purpose indicator LEDs. Other features include: For detailed specifications, go to https://pi-plates.com/product/daqcplate/
 * Dedicated onboard processor
 * Provides real time data collection
 * Allows for future code updates
 * Only needs two dedicated RPI pins (GPIO 25 and CE1)1
 * All features accessible via rich Python command set
 * Compatible with all versions of Raspberry Pi
 * Design allows up to eight DAQCplates to be stacked together for eight times the I/O
 * Uses less than 20mA of DC current during standby
 * Conforms to ROHS, FCC Part 15 Class A, and CE standards
 * All inputs and outputs ESD and overvoltage protected
 * Protects your Raspberry Pi while providing enhanced I/O
 * Includes programmable bi-color LED
 * Additional 14-pin header included if B+ signals are required
 * Capable of reading up to seven HC-SR04 distance sensors
 * Each DAQCplate is 100% tested and verified
 * Detailed Online Users Guide with Examples

MOTORplate
The Pi-Plates MOTORplate is the most powerful motor controller you can buy for your Raspberry Pi. It has the capability of driving two stepper motors using four step sizes including microstepping. Or, it can control four DC motors with 10 bit resolution. Additional headers allow dedicated power control to each motor controller. There are four 16-bit tachometers for DC speed control and the ability to use acceleration on all motors to prevent stalls and maximize torque. Four protected general purpose inputs can be be attached to end stop, limit, optical, or hall effect sensors. Other features include: For detailed specifications, go to https://pi-plates.com/product/motorplate/
 * Dedicated onboard processor
 * Allows for future code updates
 * Only needs two dedicated RPI pins (GPIO 25 and CE1)
 * All features accessible via rich Python command set
 * Compatible with all versions of Raspberry Pi
 * Design allows up to eight MOTORplates to be stacked together for eight times the motor drive
 * Compatible with all other Pi-Plates.
 * Uses less than 20mA of DC current during standby
 * Conforms to ROHS, FCC Part 15 Class A, and CE standards
 * All inputs and outputs ESD and overvoltage protected
 * Protects your Raspberry Pi while providing enhanced smart motor control
 * Includes programmable LED
 * Additional 14-pin header included if B+ signals are required
 * Each MOTORplate is 100% tested and verified
 * Detailed Online Users Guide with Examples

RELAYplate
The Pi-Plates RELAYplate is the safest relay controller available for the Raspberry Pi. It has the capability of driving 7 individual relays each UL rated to switch 120VAC or 30VDC at 1 amp. This Pi-Plate has been specifically designed to protect the user and the user's hardware from any single point failure. Other features include: For detailed specifications, go to https://pi-plates.com/product/relayplate/
 * Dedicated onboard processor
 * Allows for future code updates
 * Only needs two dedicated RPI pins (GPIO 25 and CE1)
 * All features accessible via rich Python command set
 * Compatible with all versions of Raspberry Pi
 * Design allows up to eight RELAYplates to be stacked together for a total of 56 relays
 * LED annunciators provide visual status of each relay.
 * Seven screwless terminal blocks provide additional safety and convenience.
 * Compatible with all other Pi-Plates.
 * Uses less than 20mA of DC current during standby
 * Conforms to ROHS, FCC Part 15 Class A, and CE standards
 * Design to conform to the stringent safety standards of UL 60950
 * Protects your Raspberry Pi while providing enhanced relay control
 * Includes programmable LED
 * Additional 14-pin header included if B+ signals are required
 * Each RELAYplate is 100% tested and verified
 * Detailed Online Users Guide with Examples

PROTOplate
The Pi-Plates PROTOplate provides an inexpensive and convenient way to add personalized and custom hardware to your Pi-Plates based project. Key features include: For detailed specifications, go to https://pi-plates.com/product/proto/
 * A low cost yet versatile solution for adding custom hardware to a Pi-Plate based design
 * Mechanically and electrically compatible with all Pi-Plate boards
 * Mates with all three revisions of the Raspberry Pi including version A, B, B+, and R2
 * Multiple boards can be stacked to provide addition area for components
 * Comes preassembled – no soldering required
 * Additional 14-pin header included if B+ and R2 signals are required

Pridopia
Pridopia Rs-pi serials for Raspberry Pi

Rs-Pi 4 USB hub & multi-function I2C AD/DA RTC RS232 board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi (RTC-DS1307, Temperature Sensor-TMP102, D/A MCP4725,A/D ADS1015,EEPROM, MCP23008, FT232RL, ZT3243) Rs-Pi-USB-hub-I2C-multi-function AD/DA Board with USB to RS232 full DB9 9pin signal or USB to TTL (FT232RL) console port), RTC with CR1220 battrey, USB with 1.6A PTC fuse for all four USB ports. No extra extension cable need. and no extra Power adapter for USB hub. All from Pridopia All of our Rs-Pi Products are design and Made in UK
 * The Rs-Pi Internal 4 Ports USB hub with multi-function I2C board

We have four different models with different function, you can choose anyone you want. All of our Rs-Pi Products are design and Made in UK
 * 1. Rs-Pi 4 USB Hub with ( ds1307) Rs-Pi 4 USB Hub RTC -Lite
 * 2. Rs-Pi 4 USB Hub with ( ds1307,tmp102, mcp4725,24c32) Rs-Pi USB Hub-Lite
 * 3. Rs-Pi 4 USB Hub with ( ds1307,tmp102, mcp4725,24c32, ft232RL) - with USB to TTL (just need one USB cable plug-in your PC and Rs-Pi) Rs-Pi USB Hub FT232RL-Lite
 * 4 Rs-Pi 4 USB Hub with ( ds1307,tmp102, mcp4725,ads1015, 24c32, mcp23008, ft232RL, zt3243) with USB to RS232 (DB9 full 9pin RS232 COM port output) or USB to TTL console port Rs-Pi-USB-hub-I2C-multi-function AD/DA Board

Rs-Pi 4 USB hub with I2C 23017x2 32 GPIO board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-4-USB-hub-I2C-23017x2 Board All from Pridopia All of our Rs-Pi Products are design and Made in UK
 * The Rs-Pi Internal 4 Ports USB hub with I2C 23017x2 32 GPIO board

Rs-Pi 4 USB hub with SPI 23s17x2 32 GPIO board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-4-USB-hub-SPI-23s17x2 Board All from Pridopia
 * The Rs-Pi Internal 4 Ports USB hub with SPI 23s17x2 32 GPIO board

Rs-Pi 7 USB hub with multi-function I2C AD/DA board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi (RTC-DS1307, Temperature Sensor-TMP102, D/A MCP4725,A/D ADS1015,EEPROM) Rs-Pi-7-USB-hub-I2C-multi-function AD/DA Board RTC with CR2032 battrey, USB with 2 x 1.6A PTC fuse for all seven USB ports. No extra extension cable need. and no extra Power adapter for USB hub. All from Pridopia
 * The Rs-Pi Internal 7 Ports USB hub with multi-function I2C board

We have two different models with different function, you can choose anyone you want.
 * 1. Rs-Pi 7 USB Hub with ( ds1307,tmp102,24c32) Rs-Pi 7 USB Hub -Lite
 * 2. Rs-Pi 7 USB Hub with ( ds1307,tmp102,24c32,ads1015,mcp4725 ) Rs-Pi 7 USB Hub AD/DA Board

Rs-Pi 7 USB hub with I2C 23017x1 16 GPIO board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-7-USB-hub-I2C-23017 Board All from Pridopia
 * The Rs-Pi Internal 7 Ports USB hub with I2C 23017 16 GPIO board

Rs-Pi 7 USB hub with SPI 23s17x1 16 GPIO board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-7-USB-hub-SPI-23S17 Board All from Pridopia
 * The Rs-Pi Internal 7 Ports USB hub with SPI 23S17 16 GPIO board

Rs-Pi I2C 23017 x2 (or SPI 23s17 x2) 32 GPIO with uln2803 x2 board
Pridopia P-pi serials for Raspberry Pi each 23017 port A output to ULN2803, first one 23017 port B for 8 switch input, second one 23017 port B for normal output with 8 LED. with 3.5mm block terminal 9pin output, can plug in our 2803 relay board with two Step motor connector (5V,D0,D1,D2,D3) (5V,D4,D5,D6,D7) can use Step motor (28BYJ-48 5VDC) with 4 5V motor output port size 71mm x 54mm small than Raspberry Pi Rs-Pi-I2C-23017x2-2803x2 Board each 23s17 port A output to ULN2803, first one 23s17 port B for 8 switch input, second one 23s17 port B for normal output with 8 LED. with 3.5mm block terminal 9pin output, can plug in our 2803 relay board with two Step motor connector (5V,D0,D1,D2,D3) (5V,D4,D5,D6,D7) can use Step motor (28BYJ-48 5VDC) with 4 5V motor output port size 71mm x 54mm small than Raspberry Pi Rs-Pi-SPI-23s17x2-2803x2 Board All from Pridopia
 * 1. The Rs-Pi I2C 23017x2 32 GPIO with 8 Switch input & uln2803x2 output board
 * 2. The Rs-Pi SPI 23s17x2 32 GPIO with 8 Switch input & uln2803x2 output board

Rs-Pi I2C 23017 -2 or SPI 23s17 -2 - 32 GPIO Board
Pridopia P-pi serials for Raspberry Pi size 49mm x 49mm with 32 Blue SMD LED Rs-Pi-23017-2 -pi serials for Raspberry Pi size 49mm x 49mm with 32 Blue SMD LED Rs-Pi-23S17-2
 * 1. Rs-Pi I2c 23017 x2 32GPIO board I2C interface
 * 2. Rs-Pi SPI 23s17 x2 32GPIO Board SPI Interface

Rs-Pi I2C 23017 -4 or SPI 23s17 -4 - 64 GPIO Board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi with 64 Blue SMD LED Rs-Pi-23017-4 size 71mm x 54mm small than Raspberry Pi with 64 Blue SMD LED Rs-Pi-23S17-4
 * 1. Rs-Pi I2c 23017 x4 64 GPIO board I2C interface
 * 2. Rs-Pi SPI 23s17 x4 64 GPIO Board SPI Interface

Rs-Pi I2C 23017 -8 or SPI 23s17 -8 - 128 GPIO Board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-23017-8 size 71mm x 54mm small than Raspberry Pi Rs-Pi-23S17-8
 * 1. Rs-Pi I2c 23017 x8 128GPIO board I2C interface
 * 2. Rs-Pi SPI 23s17 x8 128GPIO Board SPI Interface

Rs-Pi I2C 32 Channel PWM /Servo Board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-9685-2
 * Rs-Pi I2c 32 channel PWM / Servo board I2C interface

Rs-Pi I2C 16 Channel PWM /Servo & I2C 23017 (or SPI 23s17) 16 GPIO Board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-9685-23017 size 71mm x 54mm small than Raspberry Pi Rs-Pi-9685-23s17
 * 1. Rs-Pi I2c 32 channel PWM / Servo board & I2C 23017-1 16 GPIO + uln2803 for Port A
 * 2. Rs-Pi I2c 32 channel PWM / Servo board & SPI 23S17-1 16 GPIO + uln2803 for Port A

Rs-Pi I2C 24x16 LED Matrix Board
Pridopia P-pi serials for Raspberry Pi Rs-Pi I2c 24x16 LED Matrix Board size 71mm x 54mm small than Raspberry Pi Rs-Pi-24x16 LED Matrix

Rs-Pi I2C 16x16 LED Matrix Board
Pridopia P-pi serials for Raspberry Pi Rs-Pi I2c 24x16 LED Matrix Board size 71mm x 54mm small than Raspberry Pi Rs-Pi-16x16 LED Matrix

Rs-Pi ULN2803 & SPI AD/DA & I2C 1-Wire - special for rs-pi v2-p5
Pridopia P-pi serials for Raspberry Pi ULN2803 8 Darlington transistor array output can output to 8 5V relay with 2 Step motor connector,can connect Step motor(28BYJ-48 5VDC) and MCP3002 SPI Interface 10 bit Analog-to-Digital Converter and MCP4802 SPI Interface 8 bit Digital-to-Analog Converter size 49mm x 39mm Rs-Pi-2803-1-Wire
 * Rs-Pi ULN2803 & SPI AD/DA with 1-Wire (V2-P5 support) Board

Rs-Pi ULN2803 8bit 2 Relay Board + 2 Step Motor Port
Pridopia P-pi serials for Raspberry Pi ULN2803 8 Darlington transistor array output size 55mm x 40mm Rs-Pi-2803-2Relay-StepMotor
 * Rs-Pi ULN2803 2 Relay Board + 2 Step Motor Port

Rs-Pi ULN2803 & SPI AD/DA Board
Pridopia P-pi serials for Raspberry Pi ULN2803 8 Darlington transistor array output can output to 8 5V relay with 2 Step motor connector,can connect Step motor(28BYJ-48 5VDC) and MCP3002 SPI Interface 10 bit Analog-to-Digital Converter and MCP4802 SPI Interface 8 bit Digital-to-Analog Converter size 49mm x 39mm Rs-Pi-2803-ADDA
 * Rs-Pi ULN2803 & SPI AD/DA Board

Rs-Pi ULN2803 8bit 2 Relay, 4 Relay, 8 Relay Board
Pridopia P-pi serials for Raspberry Pi ULN2803 8 Darlington transistor array output size 49mm x 40mm Rs-Pi-2803-2Relay ULN2803 8 Darlington transistor array output size 76mm x 36mm Rs-Pi-2803-4Relay ULN2803 8 Darlington transistor array output size 76mm x 76mm Rs-Pi-2803-8Relay
 * 1. Rs-Pi ULN2803 2 Relay Board
 * 2. Rs-Pi ULN2803 4 Relay Board
 * 3. Rs-Pi ULN2803 8 Relay Board

Rs-Pi L293D-3 6 Motor Board support Rs-pi V2-P5
Pridopia P-pi serials for Raspberry Pi size 55mm x 56mm Rs-Pi-L293D-3 Motor Board All of our Rs-Pi Products are design and Made in UK
 * 1. Rs-Pi L293D-3 6 Motor Board  support Rs-Pi- V2 P5

Rs-Pi L293D-2 4 Motor Board
Pridopia P-pi serials for Raspberry Pi size 55mm x 56mm Rs-Pi-L293D-2 Motor Board
 * Rs-Pi L293D-2 4 Motor Board

Rs-Pi 8GPIO Switch & I2C 23017 (or SPI 23s17) 16 GPIO Board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-23017-8-Switch size 71mm x 54mm small than Raspberry Pi Rs-Pi-23s17-8-Switch
 * 1. Rs-Pi 8GPIO Switch & I2C 23017-1 16 GPIO + uln2803 for Port A
 * 2. Rs-Pi 8GPIO Switch & SPI 23S17-1 16 GPIO + uln2803 for Port A

Rs-Pi 4 USB hub & 7 USB hub with 1-Wire Board
Pridopia P-pi serials for Raspberry Pi size 71mm x 54mm small than Raspberry Pi Rs-Pi-4hub-1Wire size 71mm x 54mm small than Raspberry Pi Rs-Pi-7hub-1Wire
 * 1. Rs-Pi 4 USB hub & multi function & 1-Wire Board
 * 2. Rs-Pi 7 USB hub & multi function & 1-Wire Board

Rs-Pi 2482-100 & 2482-800 1-Wire 9 channel Board
Pridopia P-pi serials for Raspberry Pi DS2482-800 8 channel with 8 ESD diode & DS2482-100 with 1 ESD diode 1 channel 1-Wire board with AM2302 sockt & DS18B20 socket size 71mm x 54mm Rs-Pi-9Channel-1-Wire
 * Rs-Pi 2482-800 & 2482-100 9 Channel 1-Wire Board

Rs-Pi i2c 18 bit 32 channel A/D Board
Pridopia P-pi serials for Raspberry Pi i2c 18bit 32 channel A/D board size 71mm x 54mm Rs-Pi-32Channel-A/D
 * Rs-Pi i2c 18bit 32 Channel A/D Board

Rs-Pi i2c 18 bit 16 channel A/D Board
Pridopia P-pi serials for Raspberry Pi i2c 18bit 16 channel A/D board size 71mm x 54mm Rs-Pi-16Channel-A/D Board
 * Rs-Pi i2c 18bit 16 Channel A/D Board

Rs-Pi USB to TTL console Board
Pridopia P-pi serials for Raspberry Pi USB to TTL Console module plug in Rs-Pi with normal USb to Mini USb cable with your PC or Mac size 32mm x 39mm Rs-Pi-USB-TTL Console Board
 * Rs-Pi USB to TTL Console Board

Rs-Pi RS232 DB9 cable
Pridopia P-pi serials for Raspberry Pi
 * Rs-Pi RS232 DB9 console cable with 90cm length cable Rs-Pi-RS232-DB9

Rs-Pi 16 channel PWM/Servo & L293D-2 4 Motor w/ DC Power supply
Pridopia P-pi serials for Raspberry Pi
 * Rs-Pi 16 channel PWM/Servo & L293D-2 4 Motor w/ DC Power supply Rs-Pi-16 channel PWM/Servo & 2 L293D 4 Motor & DC Power Supply

Rs-Pi 16 channel PWM/Servo & L293D-2 4 Motor
Pridopia P-pi serials for Raspberry Pi
 * Rs-Pi 16 channel PWM/Servo & L293D-2 4 Motor Rs-Pi-16 channel PWM/Servo & 2 L293D 4 Motor

Rs-Pi LCD Master Board
Pridopia P-pi serials for Raspberry Pi
 * Rs-Pi LCD Master Board support GPIO 84x48 LCD, GPIO 16x2 LCD, GPIO 20x4 LCD Rs-Pi LCD Master Board

Rs-Pi i2c LCD Master Board
Pridopia P-pi serials for Raspberry Pi
 * Rs-Pi LCD Master Board support GPIO 84x48 LCD, i2c 16x2 LCD, i2c 20x4 LCD Rs-Pi i2c LCD Master Board

Rs-Pi Power Bank Board
Pridopia P-pi serials for Raspberry Pi
 * Rs-Pi DC Power Bank Board provide 5V, 3.3V, GND signal, also provide 4 extra logic level converter on board, with 2 channel i2c input socket with logic level converter Rs-Pi DC Power supply multi-function Board

New Scratch software support our full range products Scratch interface

All of our Rs-Pi Products are design and Made in UK All can plug in our RS-Pi USB hub multi-function Board and work together.

Sfera Labs


http://www.sferalabs.cc

Strato Pi Mini Board


Features:
 * 9-28Vdc power supply, with surge and reverse polarity protection
 * real time clock with on-board lithium back-up battery
 * on-board buzzer, connected to an I/O pin of the Raspberry Pi board, for acoustic feedback
 * on-board LEDs for power supply activity
 * power supply on a screw terminal block

Complies with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/strato-pi

Strato Pi Base Board


Features:
 * 9-28Vdc power supply, with surge and reverse polarity protection
 * real time clock with on-board lithium back-up battery
 * on-board buzzer, connected to an I/O pin of the Raspberry Pi board, for acoustic feedback
 * standard RS-232 and RS-485 interfaces to the Raspberry Pi serial line, with opto-isolator and electrostatic discharge protection
 * power supply and serial connections on a screw terminal block
 * on-board LEDs for power supply and serial line activity
 * hardware watchdog implemented in the Strato Pi board, fully independent from the Raspberry Pi, controlled via the I/O pins of the Raspberry Pi board

Complies with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/strato-pi

Strato Pi UPS Board


Features:
 * 9-28Vdc power supply, with surge and reverse polarity protection
 * real time clock with on-board lithium back-up battery
 * on-board buzzer, connected to an I/O pin of the Raspberry Pi board, for acoustic feedback
 * standard RS-232 and RS-485 interfaces to the Raspberry Pi serial line, with opto-isolator and electrostatic discharge protection
 * power supply and serial connections on a screw terminal block
 * on-board LEDs for power supply and serial line activity
 * hardware watchdog implemented in the Strato Pi board, fully independent from the Raspberry Pi, controlled via the I/O pins of the Raspberry Pi board
 * integrated uninterruptible power supply, using external lead-acid 12V battery
 * 1.1A resettable fuse on battery input
 * auxiliary power supply output voltage, to power external devices with the Strato Pi UPS
 * simple UPS status and control via the I/O pins of the Raspberry Pi board
 * on-board LED for battery operations status

Complies with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/strato-pi

Strato Pi CAN Board


Features:
 * 9-65Vdc power supply, with surge and reverse polarity protection
 * Controller Area Network (CAN) V2.0B interface, supports speeds up to 1Mb/s, with opto-isolator and electrostatic discharge protection
 * standard RS-485 interfaces to the Raspberry Pi serial line, with opto-isolator and electrostatic discharge protection
 * up to 2.5A max current to the 5V Raspberry Pi power supply input pins (at 24 Vdc)
 * real time clock with on-board lithium back-up battery
 * relay with change-over (CO), Single Pole Double Throw (SPDT) terminals
 * on-board buzzer, connected to an I/O pin of the Raspberry Pi board, for acoustic feedback
 * on-board LEDs for power supply, RS-485 and CAN bus activity
 * power supply and serial connections on a screw terminal block
 * hardware watchdog implemented in the Strato Pi board, fully independent from the Raspberry Pi, controlled via the I/O pins of the Raspberry Pi board

Complies with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/strato-pi

Strato Pi Server
Strato Pi Server is a module comprising of a Raspberry Pi 3 Model B and a Strato Pi board (Base, UPS) or CAN) enclosed in a standard 4 modules DIN-rail case.

Strato Pi Server is compliant with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/strato-pi

Iono Pi Board


Features:
 * 9-28Vdc power supply, with surge and reverse polarity protection, and 1.1A resettable fuse
 * up to 2.5A max current to the 5V Raspberry Pi power supply input pins (at 24Vdc)
 * 4 power relay outputs rated for 6A at 250V
 * 2 analog voltage inputs 0÷30V
 * 2 analog voltage inputs 0÷3V on internal pin-headers
 * 7 configurable digital input/output pins
 * 1-Wire and Wiegand support
 * optional real time clock with on-board lithium back-up battery
 * 2 on-board LEDs, one for power supply and one controlled by a Pi’s GPIO line
 * power supply and I/O connections on a screw terminal block

Complies with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/iono-pi

Iono Pi


Iono Pi is a module comprising of a Raspberry Pi 3 Model B and a Iono Pi Board enclosed in a standard 4 modules DIN-rail case.

Iono Pi is compliant with CE directives for EMC, Electrical Safety, Emission and RoHS.

For more details: http://www.sferalabs.cc/iono-pi

RPI1 Passive 1-Wire Module
The RPI1 is a very simple board to allow easy use of the kernel/GPIO based 1-Wire Master on your Raspberry Pi. It is available assembled or as a kit of parts.

RPI2 Single Channel I2C to 1-Wire Master
The RPI2 is a DS2482-100 based I2C to 1-Wire Master. Fully supported by OWFS it allows you to access the full range of 1-Wire devices on your Raspberry Pi.

RPI3 Eight Channel I2C to 1-Wire Master
The RPI3 is a DS2482-800 based eight channel I2C to 1-Wire Master. Fully supported by OWFS it allows you to access the full range of 1-Wire devices on your Raspberry Pi. Having 8 separate 1-Wire channels it allows you to build a large 1-Wire network. It also optionally features a DS1307 I2C Real Time Clock IC ensuring accurate timing for your 1-Wire data even after a reboot.

Guzunty Programmable I/O Expansion Board
The Guzunty adds open source programmable hardware to the Raspberry Pi at an amazingly low price. The design contains a 72 macrocell programmable logic device, so the board functions like a 'virtual breadboard'. This board is ideal for those with many different projects in mind, because it is so flexible. It can be a simple IO expander, a 7 segment LED driver, provide servo and regular PWM outputs, or anything you can dream up that will fit into 1600 logic gates. The device is '5 volt tolerant' and so can be used to safely interface 5v logic devices (such as Arduino) to the 3.3v Raspberry Pi. The GitHub community site contains many ready made cores that you can download and use directly. You can design your own custom cores using industry standard languages such as VHDL or Verilog.

AbioWire+
AbioWire+ is a 1-Wire adapter providing seventeen 1-Wire channels with ESD protection, three 1-Wire controller chips, and a real-time clock (RTC).

AbioCard model A
AbioCard model A expansion board featuring a real-time clock (RTC), 8 bidirectional I/O lines, 8 12-bit ADC inputs, 16 PWM outputs at 97 kHz with 8-bit resolution.

AbioCard model B
AbioCard model B expansion board featuring a real-time clock (RTC), 8 bidirectional I/O lines, 8 12-bit ADC inputs, 16 PWM outputs at 40-1000 Hz with 12-bit resolution.

AbioRTC
AbioRTC is an inexpensive real-time clock (RTC) expansion board.

GrovePi
GrovePi is an Arduino based expansion board which adds support for Grove analog, digital, serial and I2C sensors.

Lintest Systems
http://lintestsystems.com

PiCapture SD1
PiCapture is a unique video capture solution that enables all of the video processing capability of the Raspberry Pi Graphics Processing Unit (GPU). PiCapture SD1 captures standard-definition interlaced video in the CVBS standard (NTSC/PAL) from Composite, S-Video, and YPbPr Component sources as 640×480 video. By using the Raspberry Pi CSI-2 camera interface and providing complete camera emulation, all of the video encoding and management capabilities of the Raspberry Pi are usable with any compatible video source. In addition, applications that require large amounts of Raspberry Pi resources (e.g. real-time image processing) are now enabled since USB capture devices are not required.