19 pieces of white LEDs lamp (220v 1w) LEDs used directly without transformer 220nF 220v mains AC voltage of 400 volts (non-polar) and 4.7mf resistor capacitor 100uF 63 volt capacitor with the overthrown 1n4007 diodes are operated with the... Electronics Projects, Transformerless Energy Saving LED Lamp 220V White LEDs "led projects, power electronic projects, simple circuit projects, " Date 2014/06/22