DIY Kit 3V-12V LM386 Super mini Amplifier Board

Kit using the audio amplifier chip LM386, a simple external circuit, the audio signal is amplified. Circuit is simple, less use of components, welding easy. Sound volume are good, high cost, widely used in small speakers and other equipment. First, the electrical characteristics
Operating voltage: DC 5 ~ 12V;
Driver Speaker: 0.5W-10W Speaker 1;
PCB Size: 36 * 39mm
Second, the circuit theory
The main circuit LM386 audio amplifier chip and audio input adjustment circuit.
By potentiometer can adjust the size of the input audio signal, thereby controlling the size of the output audio outputs.