Limiting Resistors
for leds
Calculation of values for limiting resistors.
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Calculate the limiting resistor (
R1
) needed for the led.
The current through the led and the voltage needed across it (V
_{F}
) are specified from a data sheet.
Vcc =
V
current through led =
mA
V
_{F}
=
V
Calculate the limiting resistor (R1) in Ohms to 1 dp
Limiting Resistor (R1) =
Ω
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