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 (VF) are specified from a data sheet.
Vcc =   V
current through led =   mA
VF =   V

Calculate the limiting resistor (R1) in Ohms to 1 dp

Limiting Resistor (R1) = Ω

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