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The DIY forum is for personal projects (things that are not for sale, not in production), info sharing, peer to peer assistance. No backdoor spamming (DIY posts that are actually advertisements for your business). No clones of in-production pedals. If you have concerns or questions, feel free to PM admin. Thanks so much!
It's a bitcrusher! It's not a finished product yet, but it the circuit is. Hook it up between a guitar and an amp and it's perfectly playable. The board on the bottom is an arduino microcontroller, which takes a 10 bit sample of your signal and converts it to 6 bit before spitting it out across the 6 white wires to a handmade digital-to-analog controller. PM me if you want to see the source code. The USB cable is just providing power to the circuit.
As for the sound, it's really cool. It's a great lo-fi distortion reminiscent of old DOS games (think Doom and Duke Nukem 3D). I'll upload a demo video if there is any interest.
I'm at work right now but I will post a schematic of the whole circuit when I get home. In the meantime check out http://arduino.cc for more information on the microcontroller I'm using. Basically it's an atmel AVR chip with a special bootloader that runs programs written in a variant of C++. The rest of the board is voltage regulator, USB interface for programming, and breakout headers for the I/O pins. In this application it's serving as a really crude DSP.
you could also just skip this silly software non-sense and use an 8 bit ADC going into that same R2R resistor ladder DAC. if you discard LSB 2 bits, I would think that the input volume to the dac should be made hot to compensate for this crappy 6 bit resolution. you can save yourself the trouble of making an R2R ladder, you can just buy them pre-made in SIP from mouser. check under resistor arrays + networks. follow the datasheet and the marking on the SIP package.
