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How to convert charger into night led lamp

video How to convert charger into night led lamp
I need night lamp for my room so I decide to make it from a old phone charger and 4 leds.
First with screwdriver I open the charger and inside is circut board where is two wires that give 5 volts.I connect 2 leds in serial and add 2 more leds in parallel.
All that I put inside the charger and glue it.
With energymeter I measure that this led lamp pull about 2 watts.

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