EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: KrisBendix on September 29, 2018, 08:47:30 pm
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Hi.
Just a random tinkering project. I want to use a car radio as an amplifier. Need to get audio in somehow. It has a removable CD player. The connector pins have left and right channels (and s-ground which is for audio input too I guess?). I wonder if there is a way to trick the radio so it stays on CD play mode and lets the audio trough. Ideally to work without the CD player attached. Would free up space for a power supply.
Any pins to connect or something like that?
https://i.imgur.com/DX2Mo9f.jpg
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An easy way is to keep the CD player attached with a CD in it.
Then you switch the audio pins to your Aux.
I see that there are two Bus pins. (Bus- is also Gnd)
Presumably this is used for the CD player and radio to communicate and let the CD player tell the radio that it is playing a CD.
You should investigate what is transmitted over this bus.
You can then program a microcontroller to send the same signals.
Do you want to keep the radio function?
You could also wire the Aux in between the amplifier section and radioreceiver.
May be add a switch or relay to keep both functions.
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No, I don't think I would use the radio. Will have to investigate that option. Thanks for the idea.
I think it also has a connector for tape player on the bottom. Maybe it is "less digital". Working with microcontroller would be a bit too complicated for this project tho.
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What car radio is it factory or aftermarket, I made an adapter for the one I have in my garage. Once the radio sees that there is power going to the CD player it will pop up when you turn it on.
Hi.
Just a random tinkering project. I want to use a car radio as an amplifier. Need to get audio in somehow. It has a removable CD player. The connector pins have left and right channels (and s-ground which is for audio input too I guess?). I wonder if there is a way to trick the radio so it stays on CD play mode and lets the audio trough. Ideally to work without the CD player attached. Would free up space for a power supply.
Any pins to connect or something like that?
https://i.imgur.com/DX2Mo9f.jpg
Sent from my PH-1 using Tapatalk
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Factory. Model is bl4c 66 9s0 from Mazda 232.
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Many people feed audio into a car radio with a little stereo FM transmitter that has a short range.