LED - Tag - Abhis Lab Bloghttps://abhislab.in/tags/led/LED - Tag - Abhis Lab BlogHugo -- gohugo.ioenWed, 22 Jul 2026 10:07:39 +0530LED Resistor Calculatorhttps://abhislab.in/posts/ledcalc/Wed, 22 Jul 2026 10:07:39 +0530Abhihttps://abhislab.in/posts/ledcalc/

LED Resistor Calculator

Calculate the exact current-limiting resistor needed to safely run an LED.

Power supply or battery voltage
Red/Yellow ~2V, Blue/White ~3.2V
Standard 5mm LED is typically 20mA
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