555 timer LDR controlled astable multivibrator mode LED flasher circuit

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555 timer astable mode keeps setting the output high and low continuously. The speed of which depends on how fast a capacitor charges from 1/3 to 2/3 voltage and back again, over and over.

555 tmer LDR controlled astable multivibrator LED flasher circuit light dependent resistor schematic diagram by electronzap electronzapdotcom
555 tmer LDR controlled astable multivibrator LED flasher circuit light dependent resistor schematic diagram by electronzap electronzapdotcom

The capacitor and it’s series resistance values determine how fast the capacitor charges/discharges. Larger values = longer time, while smaller values = shorter time.

A light dependent resistor (LDR) is a resistor whose resistance changes based on how much light is falling on it. Brighter light = lower resistance while lower light levels = higher resistance.

Video

555 timer light dependent resistor LDR controlled astable multivibrator flashing LEDs circuit

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Transistors will probably be the most challenging components to learn. Understanding them will help you understand all of electronics much better, and help you the most in being creative while designing your own circuits.

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