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  • EMRAX Motor Teardown - The EMRAX series of motors are some really impressive axial-flux motors, designed in Slovenia, for applications like ultralight aircraft. Thanks to their ...
    2 weeks ago

November 23, 2011

Retro Rechargeable USB Booster


This project started when I found a 7805 voltage regulator when I was searching through old circuit board for useful parts to scavenge.  Since these chips are often used in DIY USB chargers, I decided to build such a charger, but with some major improvements over the typical 9V battery powered chargers housed in Altoids tins.


Retro Rechargeable USB Booster