Rapha Sportswear has a stationary race controller prototype that they need replicated for an event next week. The first step int this process was to break out the original design into 3 boards one for input processing one for the stepper drivers and one for the processor itself. Since the customer wanted to be able to modify the code themselves in the future and expand the system an Arduino or Wiring compatible board will be used.
(The completed project)
The motor boards consisted of 4 darlington transistors on the best performing heat sinks I could find.
The I/O – Processor Board.
The I/O Processor board consisted of to schmidt triggers to clean up the input and a usb to serial connection for programming and future use. The board also has 3 free ports for future use.