4 ms·
Would a battery acting as UPS help then? One used just to power the system long enough to properly shut down in case of main power failure?
by silviot 7y ago
Would a battery acting as UPS help then? One used just to power the system long enough to properly shut down in case of main power failure?
- a1369209993 7y agoYou don't even need a battery; even a 220uF capacitor gives you a couple of milliseconds at USB power levels[0]. 0: USB is supposed to draw < 0.5A @ 5VDC, a resistance of >10Ω. 1F*1Ω=1s, so at 10Ω, each 100uF gets you one millisecond. You do need to worry about voltage dropping off over time though.