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Registered Member #49
Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
My roomate works for Landys & Gyr, who make electrical meters (like for the side of your house). He brought me a huge box of meter boards, and each has a nice backup capacitor, I think about 1F.
What can I do with these low voltage high capacity capacitors?
Registered Member #188
Joined: Thu Feb 16 2006, 05:18PM
Location:
Posts: 67
I happen to have 3 50F/2,5v (Powerstor B series) and around 6 10F/2,5v (Elna Dynacap) here. These are low impedance (<0.1Ohm and can easily melt 1.5mm solder wire)... Maybe i find some use for them. The typical 1F 5.5v have around 20-200ohm ESR.
Registered Member #33
Joined: Sat Feb 04 2006, 01:31PM
Location: Norway
Posts: 971
I used to have tons of these caps from Landis/Gyr meters. I made backup lights with some of them: . What kinds of boards are these, the type that contain 4 caps on each?
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
They are very popular for small robots as battery substitution. They even have them find thier own charger when the cap gets low. Steve
Maybe he could find a miniature SSTC and charge himself with a resonator. He'l only have to ground himself (or just a plate close to ground for more neatness but less efficiency)
Basically the same thing you could do with a box full of rechargeable batteries.
Even with tens of farads of capacity at low voltages such as 2,5 or 5 V it's hard to acheive energies higher than few hundred joules at most.
Compared to a single 1Ah 9V battery wich would have ultimate 32400 joules of energy. And we still manage to get them empty pretty fast.
You can join the long running 4HV capacitor car competition. The rules are 15 joules or less, the longest distance wins.
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What to do with 20 Farads?
