I am trying to design a circuit which will switch between two RGB outputs into a CRT TV's neck board. Each of the two outputs has three pins. I have tried using the 2N3906 PNP transistor, and it works but I have hit a wall with trying to get it to switch to a second output without interfering with the prior output. My design doesn't also seem correct as per where I have placed the resistors across the transistors according to examples online that I have found, but it seems to be working.
- The output voltages are ~1.2V at 40uA.
- An ATMEGA328 is being used to control the logic.
- Pin 3 of the ATMEGA328 is what currently controls the original AV RGB signal.
- Pin 2 of the ATMEGA328 is what will be used to control the additional output.
- The "IN CRT" labelled R1, G1 and B1 are the INPUT to the CRT neck board.
- The "OUT IC" labelled R2, G2 and B2 is the AV RGB OUTPUT.
So, to avoid additional confusion I simply need to duplicate the transistor array so I can control a second output.