20ma will work for most regular leds. This led calculator will help you design your led array and choose the best current limiting resistors values.

Led Resistor Calculator

Led Resistor Calculator

Quickar Electronics How To Hook Up Leds Choosing The
Going beyond that maximum current even briefly may damage the led internally without any visible signs.

Led limiting resistor calculator. Some good values to try. Must calculate the resistor for a led string of 4 green 5mm leds and 12v supply. Led current limiting resistor calculator.
Enter the values for your circuit below. Led resistor calculator a current limiting resistor sometimes called a load resistor or series resistor connects in series with a light emitting diode led so that there is a correct forward voltage drop across it. Current limiting resistor calculator for leds.
Current limiting resistor calculator for leds. 15 and 9 volts as led forward voltages. The led calculator will display the resistance value draw a small schematic and show you the color code of the nearest lower and higher standard 5 resistor.
5 7 and 12 volts batteries. Using the datasheet of the led and the voltage used to power the led this calculator can determine what resistance in series is required to get your led functioning and prevent it from burning out. Current limiting series resistor calculator for leds each light emitting diode led has an optimal current that they can safely handle.
Led current limiting resistor calculator calculates a current limiting resistor for leds. Led series resistor calculator use this tool to calculate the resistance required to drive one or more series connected leds from a voltage source at a specified current level. 30 35 volts led current.
When you select a resistor for this purpose choose a device with a power rating between 2 and 10 times the value calculated below in order to avoid excessive resistor temperatures. Superbright leds can. To get started input the required fields below and hit the design circuit.
Voltage drop across led volts desired led current milliamps how many leds connected calculated limiting resistor ohms nearest higher rated 10 resistor calculated resistor wattage watts safe pick is a resistor with power rating of watts. 2 volts blue and white.

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