A PICAXE-18X REPEATER CONTROLLER
Using a 5VDC relay for switching the audio and 12VDC relays for switching the PTT, Fan and a Spare Output.
The 3 relays at the bottom of the picture are 12 volt relays and the relay at the upper left is a 5 volt relay.
Controller Art Work with relays Controller Schematic with relays Controller "BASIC" Program
Controller Bill of Material with Relays Link to PICAXE-18X Controller Board w/MOSFET's