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Calculate resistor for LED

Electronics:
Calculate resistor for LED

With this calculator you can calculate online the tolerance class of resistors for LEDs.

Calculate resistor for LED

Resistance males with LED
In short:

Here you can make an online calculation of the resistance required for a light emitting diode series.
Quick manual
Input of the operating voltage of the circuit, the forward voltage and the forward current of the LED allows the automatic calculation of the resistor that must be installed. Selection of a tolerance class of resistance allows refining results further.
Enter the voltage at which the circuit operates. operating voltage
volt
Enter the forward voltage of the LED. This information can be found usually in the catalog merchant. LED forward voltage
volt
Enter the forward current of the LED in milliamps. This information is found usually in the catalog merchant. LED forward current
mA
Specify the tolerance class of the series resistor. tolerance class
(Last colored ring of the
resistor)
A / grey ± 0,05% -
B / purple ± 0,1% - E 192
C / blue ± 0,25% - E 192
D / green ± 0,5% - E 192
F / brown ± 1% - E 96
G / red ± 2% - E 48
J / gold ± 5% - E 24
K / silver ± 10% - E 12
M / --- ± 20% - E 6

This value indicates how much power the resistor destroyed (converted to heat) so that the LED does not break.
 volt
The resistance shown here is calculated. Use the next higher resistance.
Calculated resistance (informative)
 ohm
This is the resistance that you need to use in your circuit.
to-use resistance
 ohm
The current flows in your circuit, if one starts from the nominal value of the resistance.
operating current ohm (Nennwert)
 mA
The current flows in your circuit at the lowest resistance value within the selected tolerance class.
operating current ohm (- % Tolerance)
 mA
This current flows in your circuit at the highest resistance value within the selected tolerance class.
operating current ohm (+ % Tolerance)
 mA
Power loss drops the resistance. When choosing a resistor you need to verify that the resistance of power designed.
dissipation of the series resistor
 mW
The maximum power dissipation that can occur at the selected tolerance class of resistance is specified here.
dissipation of the series resistor (at - % Tolerance)
 mW
The minimum power dissipation that can occur at the selected tolerance class of resistance is specified here.
dissipation of the series resistor (at + % Tolerance)
 mW








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