In retrospect it may have been a better choice to use a 2×3 IDC connector and route the signals using the AVR ISP standard (from AVR: In-System Programming PDF).

Instead of following in the footsteps of the USBtinyISP, [Dilshan] is using a PIC18F as the main microcontroller in the programmer. This chip was chosen because of its built-in USB functionality.

"The Art Controller is an open-source, hackable relay board that can be reprogrammed. "While no programming is required— the microcontroller comes preprogrammed to do everything listed above ...