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LED Current-Limiting Resistor
Formula
Every LED needs a current-limiting resistor to prevent burnout. The formula R = (Vs - Vf) / I calculates the correct resistance from your supply voltage, the LED's forward voltage, and the desired current. Choose the next higher standard resistor value for safety.
Common use cases:
- LED circuit design
- Arduino and Raspberry Pi projects
- Indicator light installations
Frequently Asked Questions
Dr. David Park
Applied Mathematician, PhD Mathematics
David holds a PhD in Applied Mathematics from MIT. He has published research on numerical methods and computational algorithms used in engineering and scientific calculators.
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