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Working on the MkII cute PSU. 1
Some of you may remember [this PSU](https://www.reddit.com/r/electronics/comments/16xqj54/i_built_myself_the_most_cute_power_supply_you/) I made a while ago. Well, as I mentioned in that post, I figured I could make a variable one with a voltage and current meter. So here it is so far. That’s a TP4056 charger board, an 18650 battery salvaged from a dead aquarium air pump, a variable step-up board which I’ve removed the trimmer and wired in a multi-turn potentiometer. And those two wires poking through the left side, they lead to a [battery level indicator](https://i.imgur.com/AKmssEY.jpg). The thicker red and black are for the ammeter, and it’s kind of odd because although it’s red in, black out, it has to be in the negative line, so that red wire is actually the negative out from the PSU. Positive out will come from the step-up board, and the yellow wire will connect there, that’s the voltage sense for the meter.
https://preview.redd.it/qa2eg7veeh3c1.jpg?width=4096&format=pjpg&auto=webp&s=5ad35cea9a5776b6b4d2a4371ddad9bda66ea40f
I would A) look for one or two chonkier output caps as the chinese tend to skimp majorly on them for those modules, even just some good extra X7Rs or B) just look for a chonkier boost module in general, what you’re looking to avoid the most is output ripple if you have a way to measure it.