RPi Tutorial EGHS:12V relay driver

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Revision as of 21:40, 31 July 2012 by Juraj (Talk | contribs) (The Hardware)

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GPIO Hardware & Software Tutorials:


This page is part of a work in progress.

Warnings

While most of these circuits may interface directly to the RPi, the use of a buffered interface (such as the one supplied by the Gertboard) is recommended which will help protect against damage. Alternatively, experiment with one of the Alternative Test Platforms.


Extreme caution should be exercised when interfacing hardware at a low level, you may damage your RPi, your equipment and potentially yourself and others. Doing so is at your own risk!

Aims

Note:
The 12V relay driver circuit has been tested with real RPi device and was working properly.

The Hardware

The 12V relay driver circuit combines protection circuits described in GPIO Protection Circuits. Design was done with respect to maximize GPIO protection and minimize GPIO current withdraw.

File:3v3.relay.dtriver.png