ohms law - Calculate series resistor value for LED on 220 Vac RMS supply - Electrical Engineering Stack Exchange
Par un écrivain mystérieux
Description
The traditional way to find the resistor value I can find on the internet is:
(Input Voltage - Forward Voltage) / Current
In my case, the Input Voltage is 200 Vac, forward red LED voltage is 2 V a
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Resistor of 20 hms, 15 ohms, and 30 hms are connected in series to
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