Computers & Mobile

10601604 3B7216F6Cc MAntonOlsen writes “This is an easy to build dc-dc switcher that can drive quite a few LEDs at 3.3V with a single AA battery. Version 1 is going in a mini mag light and I’m thinking version two will make a very light weight bike light.” [via & instructions] Link to photos.

11 thoughts on “DIY LED Flashlight

  1. i can’t wait to do this in my car! i figure i’ll hook the phone up to car adapter, and then hide it under the floor panel or something, and then i’ll have a diy low jack that i can access from any computer with internet access. alternatively, i could just get one with the biggest screen and use it as a dashboard gps… but i’d feel more like a super spy knowing where my car is every minute of the day.

    oh, how often does the data update?

  2. HELPPPPP I want to find out how to track my phone from google earth do i need the pro package or what i REALLY want to know,

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