I am an artist making a series of masks made of Fisher Price toys. These include a board with sound, LEDs, and motors. I want to use four or five with each mask from a single 12v battery and one speaker. I have made the 386 amplifier but have failed to make a successful power source after hours and hours of experimenting and searching web resources. The 7812 regulator is fine but the toy circuit/amp circuit are not. I am trying to power the 386 amplifier circuit and the toy from two of the trimmers. When using the batteries native to the toy the circuit runs as expected directly to the amplifier circuit. Any advise would be appreciated.