16-Channel 2-wire Transmission System by Andy Flind
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EPE Online May, June 2000

This design is a PIC-based 8- to 16-Channel 2-wire on-off signaling
communication link. An optional add-on interface unit extends the
possible options to internal private telephone and intercom systems.

The system communicates through a single pair of wires, in one
direction or in both directions simultaneously. It is ideal for 
remote signaling and alarm system monitoring, but it can be applied to
model railroad control, switching advanced lighting displays and many
other uses limited only by one's imagination.

Our circuit is in expandable modular form and each transmitter or 
receiver uses one PIC16F84 per 8 channels.

The latest version of the software is available from
the EPE Online Library at www.epemag.com

Last updated 8th April 2000.
