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Current Limiting Resistor Calculator for Leds

CjAngel

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If you want to calculate Resistor, please visit Here!

Some good values to try:

As supply voltage:
For molex: 5, 7 and 12 volts
Batteries: 1.5 and 9 volts

As led forward voltages:
Red and green: 2 volts
Blue and white: 3.5 - 4 volts

Led current:
20mA will work for most regular leds.
Superbright leds can go from 30mA up to several amps.


Other CURRENT LIMITING RESISTOR CALCULATOR: FOR LIGHT EMITTING DIODES

The calculators on this page can be used to find current limiting resistors and currents for Light Emitting Diodes.

The first calculator determines the resistance for a desired LED current while the second calculates the current for a given resistance.

Voltages in Volts - Current in Milliamps - Resistance in Ohms

When selecting resistors - It is advisable to choose the next higher standard value.

A browser capable of running Javascript is required for this calculator.

If LED's are connected in series - ADD their voltage drops together to get the total voltage drop.

Entering a zero for the LED voltage drop will yield the resistance and wattage for a resistance only circuit.


Please Go here : Other CURRENT LIMITING RESISTOR CALCULATOR: FOR LIGHT EMITTING DIODES