Every LED has a specified maximum current, exceeding this value will damage it. To protect or limit current, we simply use a resistor in series with it. This LED resistor calculator will help you choose the right resistor value for your LED.
- Vs is the source voltage, measured in volts (V)
- Vled is the voltage drop across the LED, measured in volts (V)
- Iled is the current through the LED, measured in Amperes (Amps/A)
- R is the resistance, measured in Ohms (Ω).
You need a resistor:
- Ohm’s Law
- Voltage Divider