I recently acquired one of these "MH-Tiny" boards via Amazon and China for a pound or so. It's on sale by dozens of shops - but I cannot find the schmatic anywhere. I was, perhaps mistakenly, under the impression that the circuit board was open source hardware. I'm not overly concerned about this, but I realised after I'd bought it that it was 5V with a regulator to match, and I realised I really wanted to attach some 3.3v peripherals. I know the chip can operate at 3.3V, presumably I also need to check the BOD fuses appropriately, but I'm a bit stuck. So yes, there are other options llike throwing it out and using a different part, but I wondered if I could provide my own regulated 3.3v to the 5V pin, bypassing the regulator. I wondered if anyone had comments on this?
You may have the opinion that I really shouldn't have bothered, that I should have used some other board. You're welcome to express that opinion and you might be correct, but if anyone knows if it can be made to operate at 3.3v I'd like to know.
I am reasonably knowledgable about electronics from the mid-eighties but I'm well behind modern trends. So please be nice.