PM: 2.8" LCD board for the PM...

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Joined: 05/10/2019
Location: United Kingdom
Posts: 5847
Posted: 10:16am 17 Sep 2022      

That's very neat! I've not attempted 4-layer yet. Well, not for anything other than a bit of playing.

I'm not suggesting this as a change, but if a spare GPIO pin was available it could PWM a charge pump or even a very simple SMPS to get sufficient voltage for a piezo. As GP25 is only useful for driving the base of a transistor it might be a good use for the latter. I must look into that...
Edited 2022-09-17 20:19 by Mixtel90