LED Series resistor Calculator

Generally LED(Light emitting diodes) required low voltage and current to operate.In Various condition LED's are attached with High Voltage DC Devices such as in UPS, TVs, DVD Playaers, Computers so a series resistor is needed to drop the voltage

Vin is the supply voltage which may larger than Led Voltage. VLed is Led voltage norammly a 2v is required for LED, but different Led colors has different ampere rating as blue LED requires 3V or more

LED Series resistor Calculator

Insert the value of Vin,Vled & Iled :