Hi, All!
I want to made sound sensor for my robot
I use circuits
**broken link removed**
but I need some help with it. circuits don't work very well.
Audioguru wrote to me
I want to made sound sensor for my robot
I use circuits
**broken link removed**
but I need some help with it. circuits don't work very well.
Audioguru wrote to me
Why is R4 in series with the speaker? It should not be there. Replace R4 with a piece of wire.
Why is a 10 ohm resistor in series with a 0.047uf capacitor missing from the output to ground as shown on the datasheet for the LM386? These are very important parts.
Why is C3 such a low value? then it passes only high audio frequencies. Use 220uF to 1000uF.
The DC voltage at the output pin 5 should be at half the supply voltage.
The supply voltage is only 5V so the LM386 barely works and has a very low output power. Use 9V.
The output of the circuit is AC that normally swings positive and negative.
Audioguru