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.
![](https://www.henriaanstoot.nl/wp-content/uploads/2022/06/image-11.png)
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)
![](https://www.henriaanstoot.nl/wp-content/uploads/2022/06/image-12.png)
![](https://www.henriaanstoot.nl/wp-content/uploads/2022/06/image-13.png)
When using the Arduino IDE:
- Preferences : Add board url :
https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json - Set board info like: (NOTE PROGRAMMER USBasp)
![](https://www.henriaanstoot.nl/wp-content/uploads/2022/06/image-14.png)
- Burn bootloader
- After that compile and upload
Source code used: https://github.com/andyhighnumber/Attiny-Arduino-Games/tree/master/MorseAttinyArcade
I had to short JP2 to get the USBasp into slow burn mode, else the attiny85 could not be found
![](https://www.henriaanstoot.nl/wp-content/uploads/2022/06/IMG20220630182951.jpg)
![](https://www.henriaanstoot.nl/wp-content/uploads/2022/06/IMG20220630174552.jpg)
Hard to do without a propper morse key!