YO3BN - Atmega AVR Development Board v2

Posted at - 17th September 2018

AVR ATmega Development Board v2

This is a simple development board for Atmega1284-PU/Atmega32-PU, an improved version over v1 board and it features the followings:
  o Easy connectivity design
  o 16MHz Quartz
  o Onboard RESET button
  o 5V regulator
  o Filtered power supply
  o All of 32 GPIO pins available
  o (REMOVED) Filtered power supply for AVCC (ADC module)
  o (REMOVED VCC) Auxiliary outputs for power supply
  o (ADDED) Power supply presence by LED indicator
  o (ADDED) ZIF socket
  o (ADDED) Reverse polarity protection diode
  o (FIXED) Lowering the value of 2k2 resistor from RESET line
  o (FIXED) The RESET button it is hard to press because it is placed near a big cap, so it should moved in next designs
  o (FIXED) The capacitor at ADC-REF pin was changed to a lower value - 100nF. That's because it is a high impedant voltage supply and a big caps. charge slowly

The Schematic Diagram

Kicad files here.

Construction Details




Final Notes
The current consumption without MCU is around 10.4mA, 6mA quiescent current for L7805CV and 4.5mA for the red LED. When RESET is pressed, current consumption increase to 11mA.

73 de YO3BN