USB Flashlight: Difference between revisions
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Adamcolton (talk | contribs) Created page with "Another project that ought to be pretty easy. I'd like a USB flashlight that I can use with my battery pack. For the circuitry, use an lm317 as a current regulator, hook it u..." |
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Another project that ought to be pretty easy. I'd like a USB flashlight that I can use with my battery pack. | Another project that ought to be pretty easy. I'd like a USB flashlight that I can use with my battery pack. | ||
I found a buck module on ebay for ~$3 that can handle 3A and provides constant current so use that. | |||
Use a 1 watt LED. I'm also thinking of using two strips of the thicker copper wire to make a flexible neck. | Use a 1 watt LED. I'm also thinking of using two strips of the thicker copper wire to make a flexible neck. Flashlight reflectors are pretty cheap on ebay. | ||
Cost | |||
* regulator $3 | |||
* LED negligible | |||
* reflector $1.5 | |||
So ~$5 for the project. | |||
[[Category:Electronics]] | [[Category:Electronics]] | ||
Latest revision as of 14:24, 11 May 2016
Another project that ought to be pretty easy. I'd like a USB flashlight that I can use with my battery pack.
I found a buck module on ebay for ~$3 that can handle 3A and provides constant current so use that.
Use a 1 watt LED. I'm also thinking of using two strips of the thicker copper wire to make a flexible neck. Flashlight reflectors are pretty cheap on ebay.
Cost
- regulator $3
- LED negligible
- reflector $1.5
So ~$5 for the project.