Holoseat

h1. v0.2 Detailed Design

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The v0.2 design is based on the answer to Q4 of the [[Initial Questions]].  The "Fritzing drawing":https://opendesignengine.net/dmsf_files/255?download=287 shown below covers the prototype design.  The remainder of this document covers the design decisions by addressing each of the requirements.

!https://opendesignengine.net/dmsf_files/254?download=288!

h2. R1: Detect movement on the exercise equipment and send walking command to video game (typically by "pressing" the 'w' key)

To send key presses, the v0.2 *holoseat* controller replaces the Arduino Uno + USB Keyboard Controller from v0.1 with an Arduino Leonardo, using the Leonardo's built-in "keyboard emulation":http://arduino.cc/en/Tutorial/KeyboardMessage.

To sense activity on the exercise equipment, the *holoseat* will continue to use a reed switch.  For v0.2, the reed switch used will be a "Radioshack 55050593":http://www.radioshack.com/product/index.jsp?productId=12706328 as with the "Arduino Bike Speedometer":http://www.instructables.com/id/Arduino-Bike-Speedometer/

h2. R2: Suppress the walk command signal

To suppress the walk command signal, a toggle switch will be added with the closed position indicating the walk command should be sent and the open position indicating the walk command should not be sent.  The toggle switch used will be a "Radioshack #275-645":http://www.radioshack.com/product/index.jsp?productId=2062509  as with the "Arduino Bike Speedometer":http://www.instructables.com/id/Arduino-Bike-Speedometer/.  See the "push button tutorial":http://arduino.cc/en/tutorial/button for an example of reading a switch/button in the source code.

h2. R3: Show the status of the walk command signal

The status of the walk command will be indicated with an LED.  The LED will be lit when the walk command is active, and unlit when the walk command is not active.  See the "LED tutorial":http://arduino.cc/en/Tutorial/Blink?from=Tutorial.BlinkingLED for an example of lighting an LED.