The project is built around a PIC microcontroller in order to build the Simple-Volt which is a tiny, lightweight R/C battery voltage monitor/alarm system.
The project uses a USB hub with 4 ports that can be enabled and disabled from PC software in order to create pulses on each hub output for USB interface.
A Basic Stamp II with a motherboard is used as the brain of this R2TAUPOP robot where two modified drive servos are utilized for operating up to 360 degrees.