I need to amplify a very tiny mic signal to read it into an analog Arduino input. Now I’ve found hundreds of amplifying circuits in the net but as I’m quite new to electronics I could not decide which is right. I am after a very simple, not super performant solution, as I will be using this signal only for experimental reasons. I’d like to use a amplification with a 2n2222a transistor and I’ve got some 100uF capacitors, aswell as many different resistors.
W/o knowing your mic it’s hard to design a simple transistor amp (though I guess you could use the values in the schematic for the 1’st link below). Frankly I’d look at one of the following …
