how to select resistance value for led with calculation 3.3V, 5V,12V,15V,24VDC |Basic Electronics|

Описание: Hi,
inthis video lecture you will learn how to calculate the LED resistance to glow the LED in proper manner.
i will teach you step by step with the help of LED datasheet how you can find the LED parameters.
if the input voltage are 3.3Vdc, 5Vdc,12Vdc,15Vdc,24Vdc then also you can drive LED properly without burning of LED.

In the second part of this lecture i will guide you to select resistor to drive the optocoupler.