SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. Thanks!
guitar. Very quick. And dirty. In fact, it sounds remarkably dirty. The amp is
made from some junk I found in my basement, along with two op amp break out boards from (you guessed it) SparkFun Electronics.
OK, a very small amount of extra thought went into it. The op amp breakout boards are AC coupled on their inputs (necessary since I'm not running with a bipolar supply), but not on the outputs. So I did have to add one cap, a 100uF electrolytic to couple to the speaker.
The mounting logistics are just about as simple:
Following the first sound tests, I added the pots from the CB (first yanking out the original pots on the op amp boards), mounted a 6Ahr lipo, and gave it a blue LED for a power indicator:
Followed by more testing with our own Pete Lewis...
That's Choppy on the couch with Pete. I don't think he was all that impressed. And if you're interested, the guitar is a Music Man Silhouette Special.
The final result is one-of-a-kind looks with one-of-a-kind
sound. Does it sound amazing? Well, that depends how you define the term.
Honestly, I haven?t even bothered to put it on a scope to see what the waveform
is doing, but I promise you that it?s deep in saturation when it's cranked. With the knobs all
the way up to 11, it makes some truly profound noises. Turn it down and it's a pretty decent clean channel.
My regular amp is a Fender Blues Jr. With my little cheapo as a preamp, I expect some interesting results. Rock on, my brothers.