Ignotum

Looks fine to my eyes, but the last time i made a motor driver it caught fire so i wouldn’t take my word for it if i was you

As long as it fully saturates i thiink it’s fine, i’ve personally only had issues with too slow switching when i switch the mosfet many times a second, or when i didn’t give a high enough voltage to fully saturate it, both of which usually led to a smoky mosfet

That’s just healthy, you’ll build up a resistance to lead poisoning

“What doesn’t immediately kill you always makes you stronger”

I use cheap trash solder, and dislike soldering, very possibly because of it

I’ll look into upgrading my solder, thanks 👍

Just based on my experience and knowledge of these batteries, which is not that much really, don’t take any of this as gospel.

Constant voltage current-limited power supply is probably the easiest way to charge it, a regulator + current limited supply like you mention would be one way of achieving that, will waste a lot of the power and charging speed will be limited by how much heat the regulator is able to dump (which for a typical TO-220 regulator without heatsink is like a watt or two? So you’d have a max charge current of like 0.5-1.0 amp)

Your current approach probably also works just fine, but i’m not sure how good it is for the batteries in the long run

You can find charger for sale online though, at least modules that you can solder up to a battery holder or whatever, i would go for one of those if you plan to use these batteries for a longer period of time

Disclaimer: not at all an expert on this, this is just my thoughts based on what i’ve heard, please correct me if i’m wrong

• Normal power supplies are CV, so you don’t have to worry too much about that, CC supplies are a bit more niche

• If you want to be able to run the amps at full power, you’ll have to add up all their rated powers and find a psu that is rated for that, it could also be wise to go with one slightly larger as well, as power supplies tend to get a bit noisy when they’re close to the limit (the voltage they give out gets noisy that is) which reduces the audio quality

• what are the input for the amps? You say they have built in rectifiers and everything? Can they be aupplied by mains directly? What is the max input voltage?