LED lamp that runs on free (kinda) power

rj11lampIf you’re a real tight-wad, here’s a lamp that will make you smile. It’s an LED lamp that is powered by your phone line. If you’re scratching your head in confusion, you must not know that phone lines carry a low level of electricity. That’s why you’re analog phones work even when the power goes out. This 8 LED lamp takes advantage of that fact by including an RJ11 plug that you can connect to any standard phone jack. I’m not sure how bright the lamp is though. You can buy one from Uxsight for less than $5.

[via Gizmag]

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7 thoughts on “LED lamp that runs on free (kinda) power”

  1. Now THAT is COOL!
    Too bad they are all sold out.
    And that the postage is more than the product. But it’s still cool.

  2. I’ve built something like this before. Actually right after the 94 earthquake (lived in and still live in Northridge, CA) — small LED lights and a trickle charger for some nicads (pager). 4+ days without real power and one gets inventive.

    You don’t have a lot of power on the line — and if you draw too much you’ll impair your phone service. The phone company usually isn’t to happy about stuff like this, either.

  3. You can draw about 2ma — MAYBE 3ma off the phone line BEFORE the phone company thinks your phone is off the hook (and ring busy to the outside world). Knowing that, with a simple circuit, you can make your light.

    The charger was a re-hashed solar battery charger (solar cells long busted). Powered that using the same circuit from above. Kept my alpha pager alive.

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