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How LED blink

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New Member
Hi pls can anyone explain to me the device that makes a LED to blink in a circuit and how it does that


Well-Known Member
Most Helpful Member
Really depends on the circuit but for all practical simple purposes it turns the LED on and off. That can be done several ways. Pulses from a clock or other source is one method. The LED can be turned on and off for equal periods or on a short time and off longer time. Your question is a little open ended with several answers.



You can buy blinking LEDs so a circuit is not normally needed unless it's purely for educational purposes.


New Member
LEDs can be made to blink by applying a low frequency square wave to its terminals. You can use 555 timer IC to make LEDs blink or stuffs like that >_>
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Well-Known Member
Or build a simple flip flop circuit with 2 transistors, 2 capacitors 4 resistors and one or two led's to suit the purpose.
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