This is a microcontroller based DIY clock synthesizer module in Kosmo format. It offers high precision and reproducibility, variable clock division, tempos from 7.5 to 208 beats per minute, and up to 24 clock pulses per beat.

00:00 Start 00:10 A need for clocks 00:50 Use an oscillator? 02:30 Use a microcontroller 03:08 The clock module 04:20 Beat, clock, and clock division outputs 05:15 Setting the tempo — Increment mode 07:25 MM mode 09:00 Tap tempo 09:37 Changing settings: /N amount 10:31 /N offset 11:08 Pulses per beat 12:21 Width (duty cycle) 13:20 Screen blanking 14:09 Wrapup

Schematics, design files, Gerbers, and software are available at https://github.com/holmesrichards/clock

Blog post: https://wordpress.com/post/analogoutputblog.wordpress.com/17219

Music: Ringtone by Rich Holmes