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how can i power my 3 AAA led flashlight with USB?

i want to power my 3 AAA led flashlight from a usb?
thanks.


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Re-design6 years ago
The outside pins are +5 and ground.  Use a meter to determine which is which if you need polarity.  Or look at this pinout if you want to know them all.

The usb port is only good for about half an amp or less so don't use too much or you'll run the risk of loosing your usb port and maybe your motherboard.
100mA, except by negotiation.

Steve
iamsinned06 (author)  steveastrouk6 years ago
this is the flashlight i want to make it a usb flashligt.


IMG_0008.JPG
iamsinned06 (author)  iamsinned066 years ago
it uses 3 AAA battery. so it's 4.5v?
how can i plug it to usb port in my laptop to use it as flash light or a stand light?
MEasure the current the thing draws then.