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

Author	Message
Mixtel90 Guru Joined: 05/10/2019 Location: United Kingdom Posts: 6024	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