The Fidget or “One Square-Inch Microcontroller” is a small, inexpensive microcontroller board and associated “shields” designed specifically to be easy and inexpensive to build for the average electronics hobbyist. Based on the Atmel ATtiny85 and the Micronucleus bootloader, the device is somewhat compatible with the DigiStump Digispark and can use the same modified Arduino software found on their site.

Features

• Small 1.00in x 1.00in Single-Sided PCBs
• Minimal parts
• All through-hole components (except for the Mini USB connector)
• Trace footprints and wires generously sized for home assembly
  • Toner-transfer method
  • Hand soldering
• Stacking “shield” design