Asked
— Edited
So I've been using these DFRobot sound sensors for a while now and they do a reasonably good, but I'm looking for a way to increase the sensitivity to improve the sound pick up. Does anyone have any recommendations for a small amplifier board that can connect between the EZ-B and these sound sensors?
Thanks.
I've used a LM386 Amp chip to build a small Amp between EZ-B and other devices,
it only needs a few additional components see circuit diagram.
You can get the 386 from Maplin, for a couple of pounds.
Chris.
Thanks for the info. I was kinda hoping for a ready made "plug 'n' play" board option, but I'll check out what needs to be done.
@Dave.
I have absolutely no idea. It sounds feasible, but hopefully someone else will chime in and advise in that.
I think Maplin sells a kit, ready made, using the 386 chip?
Chris.
Okay buddy. Not a Maplins fan but I'll check it out.
Thanks again.
If you want to send the amplified signal to an ADC pin you can but yeah try to stay with a 3.3V maximum signal. Otherwise, I would suggest using the 12-bit ADC function with an unamplified signal to get better resolution.