Morse with a ATTINY85

Last Updated or created 2022-07-17

Using above schematic and attiny program you can make a mini morse trainer. It runs on a single CR2032!

I’ve got a attiny85 programmer as pictured below.

A Attiny85 chip is a 8 pin microcontroller, but with far less pin’s and its most of the times just a DIP/DIL (Dual in line)

When using the Arduino IDE:

  • Preferences : Add board url :
  • Set board info like: (NOTE PROGRAMMER USBasp)
  • Burn bootloader
  • After that compile and upload

Source code used:

I had to short JP2 to get the USBasp into slow burn mode, else the attiny85 could not be found

Hard to do without a propper morse key!

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