/diy/ - Do It Yourself

>>1220405
So I bought a couple, and it appears they don't work properly at 5V (even though the website told me it should). I can adjust the voltage from ~4.3V to ~1.2V, like I'd expect from a buck converter, but the current control doesn't work much at all when I short-circuit it through my ammeter or through 10-20Ω of resistive wire.

My guess is the ~5V isn't enough for the 5V LM7805 voltage regulator to power the op-amps properly, which makes perfect sense. Do I need a boost converter now? Because having 3 switched-mode power supplies in a row feels fucking stupid.

Can I mod this to work off 3V op-amps with a 3V regulator, or will that just make it awful?