2026-09-21 22:50 UTC
Replies (3)
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@PatrickHerd@aus.social 2026-09-21 23:12
@tiefpunkt@social.tchncs.de any kind of power audio application is going to benefit from the lower surge impedance of a higher voltage batt directly connected
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@RueNahcMohr@infosec.exchange 2026-09-21 23:22
@tiefpunkt@social.tchncs.de low power, here is what I'd do! 1S, get a dc-dc isolator, B0515S, this will *3 the voltage, which is enough even at cutoff, BUT its noisy! The output is isolated, so you can put this in SERIES with the battery for *4, then I would regulate it back using a 7809 for a nice, clean supply! wrap it all in tinfoil and nobody should ever hear it! the isolators are typically rated to 1w, which is pretty good, and they can operate at the low 3V point (lots of switching boost converters wont) of the battery and are good to 5v (well more actually), which would be long after the battery has exploded from overcharging!
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@Unixbigot@aus.social 2026-09-22 01:28
@tiefpunkt@social.tchncs.de i’d go with multi cell, which would let me use a linear regulator if it turns out that a buck caused problems. With protected 18650 cells charging is easy, just use either a balancing bms intended for power tools, or a usb step up charging module. See pinned thread in my profile https://s.click.aliexpress.com/e/_mMoMTLH https://a.aliexpress.com/_mLtVDYf