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💡 LED Current Calculator
9V
+
-
R
330Ω
I = 20mA
Supply Voltage
9.0 V
LED Color
Red (2.0V)
Yellow (2.1V)
Green (3.3V)
Blue (3.3V)
White (3.4V)
Desired LED Current (mA)
Resistor Value (Ω)
Results
Recommended Resistor:
330 Ω
Actual Current:
20.00 mA
Voltage Drop on Resistor:
6.60 V
Power Dissipation:
132 mW
Status:
✓ Safe