The quickest project from inception to working PCB yet:
From inception to a working PCB took only 4 hours!
This is a miniature stereo audio amplifier, 0.5W per channel, that can be run from any voltage between 4-12v DC.
As usual, all the Eagle project files are available for download below & kits/bare PCBs will be available for sale for those that cannot etch boards.
Here is the circuit driving a pair of 3W 8Ω speakers from a line level audio source. The gain of this circuit is set at 50 with the components specified.
As can be seen from the schematic, this is a pair of single LM386 ICs for each channel.
Gain can be set by altering R3 & R4
Buy Kits Here £9.50:
[wp_cart_button name=”LM386 Stereo Audio Amplifier Kit” price=”9.50″]
Buy bare PCBs here £5:
[wp_cart_button name=”LM386 Stereo Audio Amplifier PCB” price=”5″]
PCBs are etched on FR4 laminate with 8oz copper with top component silkscreen.