Development board with ATMEGA16 4 relays outputs 4 optoisolated inputs
Price25.95 EUR
10 - 49 pcs23.36 EUR
50 - 10000 pcs20.76 EUR
In stock

AVR-IO-M16 is a small but powerful board, perfect for small automation projects. The board has four Relays with a 10A/250VAC current switching capabilities, four optoisolated digital inputs and a RS232 port. One of our demo software shows how easy it is to control the inputs and output by a PC computer through the RS232 port.


  • ATMega16-16AI
  • ICSP 5x2 pin connector for in-circuit programming with AVR-PG1, AVR-PG2, AVR-ISP500, AVR-ISP500-TINY, AVR-ISP500-ISO or other compatible to 10 pin ICSP layout
  • JTAG 5x2 pin connector for in-circuit programming with AVR-JTAG, AVR-JTAG-USB or other compatible to 10 pin JTAG layout
  • Status LED
  • Reset IC ZM33064
  • Quartz crystall oscilator circuit 16MHz
  • Voltage regulator +5V, 7805 and filtering capacitors
  • Power plug-in jack
  • RS232 DB9 female connector , RS232 and interface circuit with Tx, Rx signals
  • 4 optocoupler isolated inputs with screw terminals
  • Input status LEDs
  • 4 relay outputs with 5A/250VAC contacts with screw terminals
  • Output status LEDs
  • Four mounting holes 3.3 mm (0.13")
  • FR-4, 1.5 mm (0.062"), green soldermask, white silkscreen component print
  • Dimensions 80x100 mm (3.9 x 3.15")



  • AVR-IO-M16 demo control via RS232 port (C source and HEX)