LED series resistor calculator
CI
CircuitSim
·
Created Oct 3, 2026
·
Updated Oct 3, 2026
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Details
Components
3
Schematic
Yes
Simulation
DC operating point
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About this circuit
Fixed forward-voltage LED approximation using a diode switch (1 mΩ on resistance). Choose the forward drop from the LED datasheet at the intended current. One source, one series resistor, one diode, and a current probe. Maintained through Admin → Calculators.
Components used
Components used
3 components
NameManufacturerMPNCountType
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