I used 2 li-ion rechargeable batteries in series, an LM7805, some resistors, a capacitor, a switch and a green led to build this simple emergency charger. This charger will power any USB device including Iphones and Continue reading
Here is my electric bicycle conversion.
I started with a normal mountain bike, quite old I have to say, I guess it’s more than 10 years old.
I wanted to Continue reading