 Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me. |
Forum Index : Solar : Solar lamp
| Author | Message | ||||
vasi Guru  Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
I received 4 solar lamps as christmas gift. 
The solar cell charging one AAA NiCd accu 1.2V, 600mAh. The question is, how powerful this cell is? Anyone know? Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
||||
wind-pirate Senior Member  Joined: 01/02/2007 Location: CanadaPosts: 101 |
We have about 25 lights. some have two batteries in then. I have seen 3.5 volts out of some of them. "In the bright sun" some are about 5 years old now. The batteries don't hold a charge as good as they once did. Keep them clean "the contacts" so they will charge. They need at least 5 hours sun a day. Ron THE Pirate. stealing wind & solar energy is fun |
||||
Tinker Guru Joined: 07/11/2007 Location: AustraliaPosts: 1904 |
Vasi, it is easy to find that out yourself. I assume you have a multi meter? If so, set it to read current (200mA range) and short circuit the solar cell with the ampmeter. If you do that with the cell facing the sun you will see the maximum short circuit current the cell can produce. Don't worry about the short, all solar cells can handle a short circuit easily - as long as your meter can handle the current  .
Now, set the meter to read DC volts, 10V range, and measure the output volts at the cell with no load. You now have two maximum figures, both DO depent on the solar strength which is not a lot in your winter I assume. The useful output of your cell is somewhat less than the short circuit current you measured. Klaus Klaus |
||||
| vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Thank you guys, I wanted to not destroy that cell soldering wires if don't work... better using them as solar lamps. But I can destroy one, I must know the results. Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
||||
| wind-pirate Senior Member Joined: 01/02/2007 Location: CanadaPosts: 101 |
Do the tests at the battery holder. No need to solder to the board. Ron THE Pirate. stealing wind & solar energy is fun |
||||
| vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Very good ideea, Solar lamp but inside. Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
||||
 Print this page |
