Introduction: Fading LED Circuit Explanation

Picture of Fading LED Circuit Explanation

hello, like i promise in my previous instructuble today i will tell you how a fading led circuit works.

Step 1: Read My Previous Instructable

in my previous instructuble, i show you how to make a fading led, link:

Step 2: Watch the Video

the video is in my youtube channel Christopher Tjia. link:

Step 3: The Explanation

Picture of The Explanation

the ne555 timer is used in astable mode, and the transistor is used to amplify the current. in astable mod the ne555 tmer oscillate in a particular frequency, that means output pin 3 will go high and low periodically. if pin 3 is high, the transistor will start working and amplifies the current. current will go through the capacitor and charge th capacitor. and the led will glow. and after that pin 3 will be low, the transistor will stop working and the capacitor will discharge through the collector-emitter junction and the led will illuminate fade. so, the fading led depends on the value of the capacitor and the resistor. if say, i used a 30uF capacitor, the led will fade slower.

thank you for reading this instructables please like and share this instructable. until next time, bye!


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