Compact solar charger / flashlight
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Published on January 1, 2013
This thing was Featured on January 1, 2013
Derived from
Solar Charger / Emergency Light
by dkennell
Description
This compact solar phone charger has a one-piece case, a 2 watt solar module, and a 2700 mAh lithium ion battery. The 3 bright white LEDs give a nice focused beam for a flashlight.
Instructions
Print case and assemble electronics. Use the 10 ohm resistor for the 3 bright white LEDs in parallel and the 1.2 kohm resistor for the 3 mm indicator lights.
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thecrazy
on
January 2, 2013
said:
Ouch.. thats an expensive bom.
mcstar
on
January 2, 2013
said:
Good point,
So I did the math and at $95 worth of parts, and gathering 24 watt/hours per day (assuming 12 hours of direct sunlight and 100% charge efficiency which is not possible), it would take you ~88 years to collect enough energy for the device to pay for itself. This also assumes you pay about $0.12/KW for mains power and all the components last that long.
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License
Compact solar charger / flashlight by dkennell is licensed under the Attribution - Creative Commons license.
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I happen to have almost all of the parts for this, but would like to remove the flashlight portion, and make the batteries removable. Are you willing to share whatever cad file you have for the source for this? Thanks!
I have uploaded the Inventor file, as well as STEP and IGES formats. Hopefully one of those will work for you.