![]() Once it's in place, it's easy to attach a couple of pots (+5 and GND on each side, the centre lug going to an analog input), a switch (rigged as a voltage divider giving three levels on an analog input) and a pulse input (a 3.5mm jack going straight into an analog input with a pull down resistor to filter out noise when it's not connected) You can power the module over USB while programming it - presumably not a good idea to attach USB and the power ribbon at the same time! There is supposed to be a way to use a normal arduino board as an FTDI cable, I didn't try that. You then need an FTDI cable to program it - it works exactly like a normal arduino. ![]() I bought an ATmega with the bootloader already in place. I used this Boarduino schematic from LadyAda. There are 4 parts to itĪRDUINO: The supporting circuitry for the Atmega 328 chip is surprisingly straightforward- +5v power, ground, one resistor, one 16mhz crystal, two caps, a press switch and some header. The circuit is super simple, and I haven't drawn out a proper schematic. I built it using a proto kit and faceplate from - had to drill out a few of the holes, but it's much easier than starting from scratch. A couple of people asked for some details on the Midi beat clock mentioned here
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