A general purpose USB Relay board (controller) for connection to a PC's USB port using VCP (Virtual COM port). Control devices using your PC. USB Relay Board allows a PC to control a single external device using simple RS232 commands. Relay is fully powered from the USB bus. Free download USB relay board control software.
This converter can be used on any Microcontroller - PIC, Atmel or other which has TTL serial communications. Converter provides two way serial communications signal conversion between the TTL (Transistor Transistor Logic) output to and from a personal computer USB port using virtual serial COM port.