I got a project where i need a simple solution to play 5-8 short and loud sound effects.
i trired the DF-Robot and it almost worked fine when i power it from arduino that is connected to usb.
but once i use any external powering batteries, i got noise i tried connecting 9v to voltage regulator, tried the 5v output of an arduino connected to 9v battery, and also 3-4 AA 1.5v batteries.
always has that noise coming out of the speakers.
last thing i did, i connected a 12ohm resistor between the mp3 player and the speaker and it worked.
but the sound is lower !
can anybody help me