Скачать или смотреть how to make usb led light

in this video i am show how to make usb power led at home

required .

1. 2*1 watt led
2. 10 ohm resistor /.5 watt
3. usb cable
4. wast led bulb
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how to make small size portable 220 ac inverter at home

this project required.

1.12012 transformer /700ma (milliampere)
2.12v lithium ion battery
3. 2n3055 transistor
4. 440 ohm resistor /2 watt
5. switch
6. ac bulb holder
7. plastic box
8. same wire
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