USB emergency charger for mobile phones/Iphone/Ipod & usb devices

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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

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My Electric Bicycle (E-Bike) !!!

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