The works like sketch model determines whether or not we will be able to accruately detect a touch. The room itself will contain mounts of the three primary colors: red, blue, and yellow. For the purposes of testing, we took a look at 5 mounts that were securely attached onto a wooden board.
Mechanism
We used a 5-pin capacitor touch sensor to detect any contact made with the mounts. The sensor takes input signals when there is a change in conductance. Given that the mounts are insulators, we used copper tape to create a conductive surface on the top, which is where people usually grip the handle. In the final model, the conductive surface will surround the entire handle, but given that these mounts are close, we limited the amount of copper taped used. The 3-feet of distance between handles, as explained in the looks like model, gives us enough space such that we limit an false positives.
With the current sensor, we are only able to detect one mount at a time. For future iterations, we will be able to detect numerous senors allowing us to incorporate secondary color commands: orange, green, and purple.
Demo
The arduino code selects of the three primary colors at random and asks the user to touch the specified color. Should the user touch the correct color, they will be rewards with a "Congrats", but if they do not, they will be met with a "You fail...".
To take the code even further, we can incorporate a condition such that 5 correct touches will win you the game, while 1 mistake ends the game.