Using PicBasic with the PIC16F84 PIC Microcontroller. Creating & Using Asynchronous Serial Solutions: How to build your own 12-Pin I/O-expander using the PIC16F84 and PicBasic. This project will control up to 12 individual relays through a serial connection to your PC or other asynchronous serial interface. schematic diagram

Using PicBasic with the PIC16F84 PIC Microcontroller. Creating & Using Asynchronous Serial Solutions: How to build your own 12-Pin I/O-expander using the PIC16F84 and PicBasic. This project will control up to 12 individual relays through a serial connection to your PC or other asynchronous serial interface.