SparkFun: 0.5" Force Sensitive Resistor - Revision history

Yoder at 19:28, 14 November 2012

2012-11-14T19:28:04Z

2012-10-22T03:09:35Z

2012-10-22T00:12:05Z

Added MiniProject 4 graphical interface

2012-10-03T14:34:15Z

Added Grade

2012-09-27T15:53:17Z

2012-09-26T13:00:16Z

Moved Category to the top and shorten the SparkFun to show up under "S"

2012-09-25T16:05:56Z

2012-09-24T15:55:20Z

SparkFun category

2012-09-22T20:58:59Z

2012-09-22T20:43:14Z

@@ Line 6: / Line 6: @@
 Wiring:   2
 Code:     2
-git/Compiles with make: 0, I get a Segmentation fault when I run it.
+git/Compiles with make: 0, No makefile
 Demo:     2
 Total:    8
-Comments: Looks good, but I get a Seg fault when running your code.
+Comments:
-Let's figure out why.
 </pre>

@@ Line 54: / Line 54: @@
   beagle$ '''opkg install nodejs'''
-With ''nodejs'' installed, pull the files from my [https://github.com/shinnsm/ECE497/tree/master/MiniProject04 MiniProject 4 repository] onto the BeagleBone in a convenient folder, then run:
+With ''nodejs'' installed, pull the files from my [https://github.com/shinnsm/ECE497/tree/master/MiniProject04 MiniProject 4 repository] onto the BeagleBone in a convenient folder. Make sure the force sensitive resistor is connected to ain6 as described above, then run:
   beagle$ '''node buttonBox.js'''

← Older revision		Revision as of 00:12, 22 October 2012
Line 47:		Line 47:

	The result of this program is that the harder one squeezes on the force-sensitive resistor, the brighter the LED illuminates. It is configured to require quite a bit of force for maximum brightness.		The result of this program is that the harder one squeezes on the force-sensitive resistor, the brighter the LED illuminates. It is configured to require quite a bit of force for maximum brightness.
		+
		+	== Graphical Display ==
		+	A graphical display is available for the force sensitive resistor in accordance with [[EBC Mini Project 04]]. To prepare the BeagleBone, start by running:
		+
		+	beagle$ '''opkg update'''
		+	beagle$ '''opkg install nodejs'''
		+
		+	With ''nodejs'' installed, pull the files from my [https://github.com/shinnsm/ECE497/tree/master/MiniProject04 MiniProject 4 repository] onto the BeagleBone in a convenient folder, then run:
		+
		+	beagle$ '''node buttonBox.js'''
		+
		+	The graphical interface server is now running. To view it, point your browser to '''''bone'':8081/buttonBox.html''', where ''bone'' is the IP address or alias of your BeagleBone. An example of what you'll see is given below. As you squeeze the force sensitive resistor with alternating force, the line graph with move up and down in real-time.
		+
		+	[[File:Force Resistior Graphical Display.png\|500px\|Graphical display]]

@@ Line 1: / Line 1: @@
 [[Category:ECE497]]
 [[Category:SparkFun]]
 [[File:Sparkfun-force-sensitive resistor.jpg|thumb|The force-sensitive resistor.]]

← Older revision		Revision as of 13:00, 26 September 2012
Line 1:		Line 1:
		+	[[Category:ECE497]]
		+	[[Category:SparkFun]]
		+
	[[File:Sparkfun-force-sensitive resistor.jpg\|thumb\|The force-sensitive resistor.]]		[[File:Sparkfun-force-sensitive resistor.jpg\|thumb\|The force-sensitive resistor.]]

Line 33:		Line 36:

	The result of this program is that the harder one squeezes on the force-sensitive resistor, the brighter the LED illuminates. It is configured to require quite a bit of force for maximum brightness.		The result of this program is that the harder one squeezes on the force-sensitive resistor, the brighter the LED illuminates. It is configured to require quite a bit of force for maximum brightness.
−
−	~~[[Category:ECE497]]~~
−	~~[[Category:SparkFun\|0.5" Force Sensitive Resistor]]~~

@@ Line 30: / Line 30: @@
 [[File:Force-Sensitive Resistor LED program.jpg|thumb|200px|Bone config for example program]]
-I've written a program which demonstrates usage of the force-sensitive resistor, available [https://github.com/shinnsm/ECE497/blob/master/MiniProject02/miniProj2.c here]. The input is the force-sensitive resistor on pin 36 (AIN5), and the output is an LED on pin 12 (GPIO1_28). The physical configuration is shown in the image on the right.
+I've written a program which demonstrates usage of the force-sensitive resistor, [https://github.com/shinnsm/ECE497/blob/master/MiniProject02/miniProj2.c available here]. The input is the force-sensitive resistor on pin 36 (AIN5), and the output is an LED on pin 12 (GPIO1_28). The physical configuration is shown in the image on the right.
 The result of this program is that the harder one squeezes on the force-sensitive resistor, the brighter the LED illuminates. It is configured to require quite a bit of force for maximum brightness.

← Older revision		Revision as of 15:55, 24 September 2012
Line 35:		Line 35:

	[[Category:ECE497]]		[[Category:ECE497]]
		+	[[Category:SparkFun\|0.5" Force Sensitive Resistor]]

@@ Line 6: / Line 6: @@
 == Bone Usage ==
 The force-sensitive resistor works well when used with one of the BeagleBone's analog inputs. The images below outline how to hook it up. This schematic on the left is modified and originally from the [http://www.sparkfun.com/tutorials/269 SparkFun tutorial on the force-sensitive resistor]. The example on the right outlines one way to hook-up the resistor to read values from the Bone.
@@ Line 12: / Line 13: @@
 A 27kΩ resistor is used to connect the 3.3V source (pin 3) from the Bone to one pin of the force-sensitive resistor. Then, the other pin of the force-sensitive resistor is connected to ground (pin 1). An analog pin (AIN) on the Bone connects to the node containing both resistors, and values can be read off of that AIN. I'm using AIN5 (pin 36) to read values on the Bone.
 == Example Program ==