So I have a small amplifier that plugs into a 12V source and a standard 3.5mm headphone jack and plays pretty good sound to a 8ohm speaker. I am wondering if I can connect the 3.5mm headphone jack to an electret microphone and play the sound from the microphone out of the speaker. I guess I am wondering what kind of voltage the mp3 player outputs. Since that work great with the amp I guess I am wondering how to get an electret microphone to the leverl where I could input it into the same amplifier.
The Op's question reminds of a tricky question paper :) . What I construde is;
- 1) 3.5mm Jack= O/P (looks like an I/p).
- 2) He wants to insert electret microphone into this jack .
But If he is listening to something with MP3 then the Jack is not an output device , he probably has an additional speaker somewhere ?? .If this is true then Jack is an I/P connector. The electret mic cannot be inserted directly, you need biasing as below .
It would be better to add a pre-amplification stage as below;
When you plug into the microphone , slowly adjust the gain of your opamp and O/P volume of your amplifier such that feedback is eleminated.
I am wondering if I can connect the 3.5mm headphone jack to an electret microphone and play the sound from the microphone out of the speaker.
No you can't. The headphone jack is an output; a microphone requires to be connected to an input so that it can be amplified.