I present a circuit to select one of four inputs stereo audio and video to two outputs with separate amplifiers that can be used to feed two TVs. I'm working on the control panel that I plan to be by remote control.
In the schematic the power transformer is wired for use with 110 Volts if you will have to use 220 Volts should change the wired as I show .
Anyway I'm going to design a printed circuit modification to 220 Volts
Nov 15 2014
Control board photos
January 29 2015
I'm working on an alternative control circuit that can be build with more common and easy to get parts FEB. 5 2015
I am uploading the diagram of alternative control module.
I'm uploading pcb files for altrnate control board
Software for the control module
Step 1. Press and hold S1 (channel switch) until a letter P is displayed. This shows that the circuit has started the programming routine.
Step 2. Point the remote control transmitter at a distance of three feet and press the button chosen to store channel one. When the circuit receives and stores the code, it will display channel one and when the button is depressed letter P will be displayed as confirmation that the code has been programmed.
Step 3. Repeat Step 2 three more times for the remainder channels. Once the 4 codes have been stored the circuit will display a letter F (programming final) to show the end of the programming and then it will go to channel 1.if you have any questions do not hesitate to ask .