Just wanted to get this out there before I forget about it, so I won’t have the schematics up.
This is your basic audio amplifier without any filters or fancy stuff. The little breadboard on the right has the pre-amp stage, a simple inverting op-amp amplifier with a gain of 4 V/V or so to get the voltage up. The one on the big breadboard on the left is the Class AB stage amp that provides the current to drive the speakers.
All that is plugged into my iPhone on one side and some computer speakers (without internal amplifier, that would be cheating) on the other. David Crowder Band – Wholly Yours is playing! You can see the waveform on the scope in the background, too!
Here’s the video, enjoy!
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