9V battery and LM7805 power a audio AMP failled? Answered
I use a 9V battery to pass power through a LM7805 to an arduino pro mini,a MP3 module,it works fine.later i am not satisfied with the low voice of the speaker,then i added an Amplifier module.the AMP module is a PAM8403-5V(could be USB powered),but the speaker produce weird sound. it seemed the PWR was not enough,so i added an extra 5V supply to the PAM8403 module,this time it sounds fine.
But i don't wnat to use two PWR sounces to power them.cause it will be bulky,is the 9v battery OK to power them all?or maybe i should use two LM7805s,one for arduino and MP3 module,and another for the PAM8403 module.
The pic attached is the working wiring of the project
Please help me with this,Thanks.