Hello,
I'm working on building my own audio/video switch for my collection of game systems. It is similar to the build in the link below but much more complicated.
How-To: Make a solid-state A/V switcher
It will have 16 inputs and 2 outputs and will be controlled by an arduino with momentary buttons instead of toggle switches.
I rigged up a prototype on a breadboard and the video works great but the best word I can think of to describe the audio is "crunchy". I think it is getting interference from the other inputs because sometimes you can make out the audio of input A when you are switched to input B for example. The problem also goes away entirely when only one system is on at a time.
all of the inputs and outputs are over RCA jacks and I just have them wired into a common ground. Should I be isolating these somehow? I have almost no experience with electronics prior to this so please keep that in mind if you think of a solution (i.e. dumb it down). I have schematics for the whole system in Eagle if that would help anyone see what I have going on. The prototype is only a portion of the schematic though.
I'm working on building my own audio/video switch for my collection of game systems. It is similar to the build in the link below but much more complicated.
How-To: Make a solid-state A/V switcher
It will have 16 inputs and 2 outputs and will be controlled by an arduino with momentary buttons instead of toggle switches.
I rigged up a prototype on a breadboard and the video works great but the best word I can think of to describe the audio is "crunchy". I think it is getting interference from the other inputs because sometimes you can make out the audio of input A when you are switched to input B for example. The problem also goes away entirely when only one system is on at a time.
all of the inputs and outputs are over RCA jacks and I just have them wired into a common ground. Should I be isolating these somehow? I have almost no experience with electronics prior to this so please keep that in mind if you think of a solution (i.e. dumb it down). I have schematics for the whole system in Eagle if that would help anyone see what I have going on. The prototype is only a portion of the schematic though.
I would look at a device like this firstly if you are switching analogue video and audio, or a mixture of switches (analogue/digital) if switching a combination.
http://www.analog.com/static/imported-files/data_sheets/ADG1211_1212_1213.pdf
I would run all inputs and outputs (especially the audio) as pseudo balanced from input to the devices, same with the outputs.
http://www.analog.com/static/imported-files/data_sheets/ADG1211_1212_1213.pdf
I would run all inputs and outputs (especially the audio) as pseudo balanced from input to the devices, same with the outputs.
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