LED (Single) Circuit Power And Series Resistor Calculator
This calculator requires the use of Javascript enabled and capable browsers. A
question that often comes up in projects using LEDs is "what
resistor should I use with my LED?" This calculator helps determine
that for you. Enter the data required for Supply Battery Voltage in
the range of 3 to 24 volts, the Diode Forward Voltage in the range
of 2 to 4 volts, and the Diode Rated Current in the range of 10 to
50 milliamps (mA). Click on Calculate for the results which assume
for power calculations, the use of the standard value
current-limiting resistor indicated. This calculator rounds the
resistance up to the next standard resistor value. You should
actually be able to buy a common 5% resistor with the value returned
by the calculator. For more detailed LED information visit these two
sites, which have good information . For identification
purposes, the negative side of the LED is the flat side and the
shorter lead.
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