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LED Resistor Calculator




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Calculate LED Resistance Online zz.led.resistor.calculator

Sun, 06 Sep 2015 17:49 GMT   Simplified Chinese

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Our group is Chinese Manufacturer which owns
3 factories and 4 workshops:
Export items:
1. LED diodes
2. Cooling modules
3. Heatsinks
4. LCD modules
Domestic market:
5. Multimeters
6. Connectors + cables

7. Switches
Factories are located in Jiangsu and Zhejiang provinces in China.



LED Resistor Calculator

Single ledLeds in seriesLeds in parallel

Voltage drop is usually 1.9~2.1V for AlGaInP, 3.1~3.5 for InGaN and 1.2V for Infrared.

Current is usualy 20mA, for UFO LEDs current is: 30mA for InGaN and 50mA for AlGaInP.
Supply Voltage – depends what you have at disposal. Usuall is 6V or 12V source.



Single led:
Single led with single resistor
Supply Voltage

VOLTS
Voltage Drop Across LED

VOLTS
Desired LED Current

MILLIAMPS


Calculated Limiting Resistor

OHMS
Nearest higher rated 10% resistor


Calculated Resistor Wattage

WATTS
Safe pick is a resistor with
power rating of

WATTS



Leds in series:
Several leds in series with one resistor
Supply Voltage

VOLTS
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



Leds in parallel:
Several leds connected parallel with one resistor
Supply Voltage

VOLTS
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

This LED resistance calculator is licensed from metku.net


Contacts
How to/FAQ
Pricelists
Catalogue
Sitemap
New Arrival
Action sale Printer friendly





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