gsuberland,
@gsuberland@chaos.social avatar

I really need to build a USB power conditioner board.

USB-C input, inrush clamping load switch, hefty pi filter stage and a couple of 470uF alupoly caps for bulk storage, 5V buck-boost, then a USB load switch with a USB type A port.

keep VUSB stable at 5V, minimising droop esp. under inrush conditions. keep device noise off VUSB. keep VUSB noise off the device.

jpm,
@jpm@aus.social avatar

@gsuberland damnit now I want one too stares at large pile of unfinished projects surely one more won’t hurt…

gsuberland,
@gsuberland@chaos.social avatar

my wife's PC motherboard has possibly the worst USB power supply in existence. it's so noisy. I don't even know how they managed to make it this bad.

ignaloidas,
@ignaloidas@not.acu.lt avatar

@gsuberland that might just be the PSU's 5V rail with zero filtering and all of the noise of surrounding digital stuff?

gsuberland,
@gsuberland@chaos.social avatar

@ignaloidas maybe? it's garbage either way, the noise is like 400mVp-p and right in the audio range.

jhwgh1968,
@jhwgh1968@chaos.social avatar

@gsuberland if you did, I'd buy one

I still miss my switchable 120W power supply that cost 100 USD and was discontinued. In addition to the switchable barrel jack output it had a 5.00V +/- 1% power output on a USB A socket that could handle like 6 A or something

It was truly the best thing ever for powering SBCs without brown-outs or weird behaviors regardless of load characteristics, unlike every other wall wart

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