I will be using my SIM808 in a vehicle to be a handsfree phone. Therefore I need a loud speaker.
I figured out I better use an amplifier.
Can you recommend me an amplifier please or tell me the proper term to search for?
Probably something with differential?
Here’s what I figured out:
- If I used only + or - of the module, I have a lot of noise with a mono amp
- If I put - of the module to gnd, the module dies
- A lot of amps on ebay have - connected to gnd and therefore kill the modem…