RF relay control circuit PIC16F628 microcontroller used in the donor card 433MHz RF transceiver module with 8 buttons (433.92 MHz) command is sent to the recipient. Sadder still used in the RF receiver in the receiver module and PIC16F628... Electronics Projects, 433MHz RF relay control circuit pic16f628 "microchip projects, microcontroller projects, pic16f628 projects, " Date 2019/08/03