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| Changing battery power to be USB power on small LED device |
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| markronz:
Hey everyone. Just hoping someone might be able to lend me a little electrical knowledge. I have this small device. All it is, is when a switch is pushed it turns on a small LED light on the top. Currently, it's battery powered by 3 AAA batteries. I'd like to make it so that this thing is attached to USB to be powered instead. Here are some pictures of the device. Top View: Switch: Lit Up: Bottom Batteries: My real question is, is it as simple as chopping those two wires going to the battery bank and splice those over to a USB cable instead? Anything I am missing? I need to figure out what wires to use inside a USB too... Thanks for any help! |
| markronz:
Someone directed me to this url. Should be very helpful! http://www.instructables.com/id/How-to-power-nearly-anything-off-a-USB-port/#step3 I think I'm just going to try it out. Worst case scenario, I just have to replace the LED! |
| RamjetR:
The quick answer is just chop the USB lead and connect the 5V and GND to the + and - of the battery contacts. The reason is simply that 3x1.5V is 4.5V and the additional half a volt will make at most 3-5mA difference to the LED. You won't even see a difference to the brightness. You'll be fine. |
| danny_galaga:
--- Quote from: RamjetR on April 02, 2015, 08:25:56 pm ---The quick answer is just chop the USB lead and connect the 5V and GND to the + and - of the battery contacts. The reason is simply that 3x1.5V is 4.5V and the additional half a volt will make at most 3-5mA difference to the LED. You won't even see a difference to the brightness. You'll be fine. --- End quote --- :stupid |
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