Re: Shaker LED flashlight
- From: "amdx" <amdx@xxxxxxxxxxx>
- Date: Thu, 10 Jan 2008 06:23:09 -0600
<mrdarrett@xxxxxxxxx> wrote in message
news:b0901368-1cd4-4985-93b9-3d8e1411647b@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jan 9, 10:16 am, "amdx" <a...@xxxxxxxxxxx> wrote:
Just for fun and as a reinforcement of the electricity
books my son has been reading. I bought a shaker flashlight. (magnetic
flux
cutting across wire moving electrons , the electrons then stored on
plates
of a capacitor) The flashlight has a magnet that slides back and forth
through a coil. The flashlight cost $1.00.
After I opened the package I noted a small screw rattling
inside the light, so I took it apart and I found two cr2032
lithium batteries in series powering the LED. The coil is connected to a
fullwave bridge and the unit has a .22f
capacitor. There is a 10 ohm resistor in series with the LED.
If I remove the batteries and short across the holder the
LED will not light, no matter how much I shake it.
I just found the batteries in there to be a disappointment. :-)
Mike
Well, the good news is, you now know of a cheap source of CR2032
batteries (which can be expensive elsewhere)...
Michael
.
- References:
- Shaker LED flashlight
- From: amdx
- Re: Shaker LED flashlight
- From: mrdarrett
- Shaker LED flashlight
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