LED Resistor Calculator
Single led - Leds in series - Leds 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: | |
Leds in series: | |
Leds in parallel: | |