Electrical Circuitry

The circuitry of the Cowabunga Board is fairly simple. It is comprised of two PIC18F2455 microcontrollers, one master, one slave, four variable force sensitive resistors, and a large amount of LEDs. The master takes in voltage values in-between 0 to 5 Volts using voltage dividers with the force sensitive resistors and then sends the data of which ones are being pressed the most to both the computer and the slave PIC. It sends the information to the computer in the form of keyboard strokes, and sends the data to the slave as a value from 0 to 255. Depending on whether or not the value is over a certain threshold, the slave will then supply power to a string of LEDs, lighting them up, and giving visual feedback on which direction the user is leaning in. Unfortunately, the amount of LEDs we wished to power were far too many for just a computer to power, along with the two PICs, so a separate DC power supply of 12 Volts and 1 Amp was used to power the LEDs.