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.
