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This is the simple version of a white LED lamp that can be directly powered from mains. It can give ample light even for reading purpose. Capacitor Cx along with diodes D1 through D4 forms the AC step ...

Date Announced: 14 Sep 2011 LED lighting drive power in the market is usually divided into two level architecture and one level architecture, one level architecture means to convert 220V electricity ...

Unfortunately the LED works only at low voltages and even then you need to use a resistor in series. It is not a good idea to limit the current at higher voltages using a resistor because the ...