My laptop's speaker isn't loud and I have hard time listening to it when there's noise. Alternatively i have a speaker that runs on battery, whose battery drains fast. so i built this speaker which is powered by USB .
Step 1: Circuit and Components Required
- LM386 IC
- 8 pin IC base
- Type A USB Connector
- 3.5mm Audio Cable
- 8 Ohm Speaker
- Two 220uf Capacitors
- 10K Pot
- 10 Ohm Resistor
- soldering iron, solder
- hot glue (optional)
Step 2: Wiring in USB Cable
- Red wire +5 Volts
- Black wire Ground
Step 3: Wiring in Audio Connector (3.5 Mm Audio Jack)
The wires coloring may be different in different cables, to make sure of the coloring use the continuity test in multimeter.
connect the green and blue wires together and the ground wires together as we are not building a stereo speaker here.
- The green and blue wires together form the audio input
- The copper wires are connected to ground