The USB Bit Whacker is a hardware module based on a Microchip PIC18 that allows you to easily control I/O pins on the board using serial commands through the USB port.
Their home page is here: http://www.schmalzhaus.com/UBW/index.html
This project uses the UBW library which can be found here UBW I/O C# Library
|UBW_CPU_Monitor.exe 0.5.1 (Windows Service)||17 KB|
|UBW_CPU_Monitor.zip 0.5.1 (Windows Service Source)||13.49 KB|
|MCHPFSUSB_Setup_v1.3.exe (Contains USB drivers for device)||3.02 MB|