I've encountered a problem. I recently bought a condenser microphone and I wanted to have some fun, so that if I said something into the microphone, I'd hear myself in the small 8 Ohm 0.5W speaker.
I have used an LM386L amplifier and there seems to be no sound at the output. It seems like it's not amplifying anything at all. Here's the circuit on the breadboard:
What I have basically done is:
- I took an output from the microphone and put it on pin 3 of LM386L.
- Pins 2 & 4 are all connected to ground.
- I used 10 uF between pin 1 and 8 to obtain a proper gain.
- On pin 7 I used another 10 uF capacitor.
- Pin 5 represents the output of the amplifier, where I put 100pF ceramic capacitor in parallel to the 600uF electrolytic capacitor and 8 Ohm speaker to get rid of all unwanted frequencies. 600uF capacitor should get rid of any DC voltage.
When I talk into the microphone, nothing happens although when I connect it to oscilloscope, I see a voltage, so the microphone works. I'm powering it with 5V.
If anyone knows the solution, please help me. And do not mind the soldered pins on the female jack.