/usb-i2c-thingy

A dongle for USB->I2C, primarily for musical uses.

usb-i2c-thingy

An I2C dongle designed to interface devices like monome norns with 3.3V i2c.

3.5mm stereo jack uses tip for SDA and ring for SCL.

Take a digispark; replace the usb tab with a micro-usb socket; add a 3.5mm jack for I2C connection; add I2C level shifting as per this datasheet. Add its own 3.3V regulator for the level-shfiting.

You can then flash this pseudo-digispark with the I2C-Tiny-USB firmware, which is supported by the Linux kernel.

STATE

nowhere near finished don't even think about using it.

TODO

  • replace 402 parts with 603
  • connect SDA/SCL to pins
  • break out programming header?
  • caps for 3.3V regulator?
  • add CCBYSA credits to board
  • add jack details (tip/ring) to board
  • routing
  • how do you program it? Mark the pins.

LICENSE

CC-BY-SA; digispark accredition to be supplied in fullness of time