MIDI Master Clock

DIY STUFF
1

I have built this master clock from a GitHub page, it originally used an i2c 1602 LCD and I modded it to use an i2c SSD1306 OLED. I also added a reset button to set the counters and midi pointer back to 0 when pushed in stopped mode only.

It works perfectly well for me on my Chinese nano v3 clones, but unfortunately for Joel Seaton it doesn’t work at all well and outputs no MIDI and the timing pulses are half of what they should be.

Anyone care to breadboard the display, pot, encoder and some LEDs to see what happens for them. It will work with a 128x64 or 32 pixel OLED.

20230104_213019
20230104_2130191920×1258 322 KB

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Run BLINK on the nano and see if it’s half the speed ( like 2 seconds instead of 1 second )
If so the clock is running at 8 instead of 16MHZ it’s probably a cheaper than cheap nanos that seemed to have this problem.

I did try to work around it

But the serial console was then out of whak and could not be bothered to fix it.

if this is the case it may be mucking up timing.

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Yeah I think we are at that conclusion as his MIDI doesnt work, we tried blink and it was 4 seconds between flashes

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