ELECTRONICS CALCULATOR
LED Resistor Calculator
Calculate the resistor value needed to connect an LED safely.
🔋
Power Source
➜
📏
Resistor
➜
LED
Power Source → Resistor → LED
LED Preview
Red LED
Forward Voltage: 2V
Calculate the resistor value needed to connect an LED safely.
Power Source
Resistor
LED
Power Source → Resistor → LED