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Old 09-11-11, 04:15 AM   #1
Airburst
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Trying to jury-rig an LED light...

I'm trying to make an LED front light out of two old solar-powered garden lamps, and I need some technical advice. The lamps have 2 AA rechargeable batteries in them, and I've just taken the light and reflector assemblies out of them. I'm thinking I'll just hook them up to two rechargeable AAs and a switch, and I'm planning to run them in parallel. The problem I have is that the lamps have some sort of control circuitry in them (they used to turn on when it got dark, until they got water in them), and I'm not sure I won't put too much current through the LEDs if I run them without the added resistance of the control circuitry. Is this likely to happen? Do I need a resistor in series with the LEDs? Each reflector has 3 white LEDs in, wired in parallel, and there are only two reflectors.

Thanks in advance
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Old 09-11-11, 10:07 AM   #2
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If those garden lamps are like the ones here in the USA, they are very low output, and not worth the time to mess with. Even a weak flashlight would outshine those things.
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Old 09-13-11, 08:01 AM   #3
Richard Cranium
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Not worth the effort, but most of the time specs are on sticker inside or try the net.......

the only thing i could "see" would be a "flasher"
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Old 09-13-11, 06:55 PM   #4
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if they have two rechargable AA's, the solar panel would be useful. It would require some electrical knowhow, but you could probably take out the solar panel and use it as a battery charger. Useful if you are keeping your bike outside during the day or touring. As far as the LED's, too dim to be useful. If you can can do it, buy a bunch of high powered LED's or maybe one or two LED's that are a watt or more-the latter would limit your battery time with just two LED's-and rig up a light array. Otherwise, buy a halfway decent LED flashlight (can be had for cheap if you aren't getting cree's or other high wattage type lights) and use your charged batteries for it.
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