I have a sound sensor which I want to connect to a RaspberryPi.
RaspberryPi input voltage on GPIO is 3.3V and this sound sensor output gives 5V.
I've made voltage divider that looks like this:
It works fine when I connect it with power supply. It gaves me ~3.1V on V out.
However when I connect it to sound sensor it does not give me the expected voltage.
My circuit looks like this:
Output voltage is ~2V and voltage between sensor output and resistor R4 is ~3.3V.
I've also noticed that the small diodeon sensor (which lights when sound is detected) lights a bit when circuit is connected that way.
What might be causing this problem? Should I add a diode between R4 and sensor output? Will this solve the problem?
This is the circuit of the sound sensor: