Written by: G4ZTD_Gnome

Led in series

Voltage drop is typically 1.9 - 2.1V for Red, Yellow & Orange LEDs, 3.0 - 3.3V for White, Blue, Green & UV LEDs and 1.2V for Infrared LEDs. Current is usually between 10 - 30mA. Supply Voltage - typically 3V, 6V ,12V or 13.8V source.

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
 
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