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Very high energy-density capacitors, typically measured in farads.
2
votes
Turn a circuit on and off when a capacitor reaches a certain voltage
I would perhaps use a relay, with discrete components you won't necessarily get good accuracy. If you don't want a huge relay hanging around, I would use a comparator with voltage reference. I'd say u …
0
votes
Supercapacitor with a rated voltage value greater than 2.7V feasible?
If you google it, they do make 10v 2200F supercaps... beasts! Afrotechmods on YouTube got ahold of a few of these and they sure do let the sparks fly.
I only put this as an answer because I do not ye …