Rotary phone (pulse dial) to tone (DTMF) converter

Rotary phone (pulse dial) to tone (DTMF) converter

Rotary phone (pulse dial) to DTMF converter based on the Atmel ATtiny45 microcontroller. Blog post about the adapter, including source code and schematic: http://boris0.blogspot.com/2013/09/ro... Source code: https://github.com/boriz/miscellaneou...