12 channel RF relay control circuit, the receiver and transmitter circuits built on 80 pic16f628a microcontroller.100 meters can be seamlessly used said outdoor area also more important aerial circuit, I don’t know, but the market used the RF module... Electronics Projects, PIC16F628 12 Channel RF Relay Control (RR10 Module) "microchip projects, microcontroller projects, pic16f628 projects, " Date 2019/08/04