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ATtiny is a series of Atmel AVR microcontrollers. Small and somewhat lacking in I/O, but still quite powerful (20MHz System Clock, 20MIPS, 64MHz Fast Peripheral Clock). Ideal for small spaces, limited resources, or a tight budget.


  • 10bit ADCs
  • USI
  • 8/16bit timer
  • PWM
  • I²C
  • SPI
  • BOD
  • WDT


All of these can be picked up in low quantities for under $5 apiece from various suppliers.