I once took two 10F, 2.5V supercaps, put them in series (so 5F 5V), charged it, and then connected them to a fairly bright red LED through a 1K resistor. The LED began at full brightness and slowly decayed. After 24 hours, I could still see some light coming out of the LED, although it was very dim. I was very impressed. Even the very bright portion of the LED's life lasted something like an hour or two. Sean On Tue, Nov 17, 2009 at 8:27 PM, sergio masci wrote: > > > On Mon, 16 Nov 2009, Vitaliy wrote: > >> The cells are about as wide as a AA battery, but only about 1/3 as long. At >> this point, I can try to find an exact replacement, or try another solution. >> I doubt that a supercap would hold enough charge to be practical? > > I had a 2.5V 5F supercap. I charged it for a while using a solar cell and > then discharged it through a small motor. It ran the motor for about 30 > seconds befor it died to a crawl then stopped. I was very surprised by how > long it ran. Look for projects on the net that use supercaps as power > sources for small motor driven toys or bots. > > Regards > Sergio Masci > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist