Blinking an LED With a 555 Timer Circuit


Introduction: Blinking an LED With a 555 Timer Circuit

Here is a detailed video I created to explain how to use a 555 Timer IC, in combination with a few resistors and capacitors, to make an LED light blink.

Things you will need:

1) Breadboard

2) Breadboard jumper wires

3) 555 Timer IC

4) An LED diode

5) A DC power supply (You can use a few AA batteries depending on the capacitor and resistor combination you used)

6) Some resistors and capacitors based off your calculation

Here is the link to the calculator provided by House of Jeff:



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    Hello. I would like to use opto devices for a switch. Break the beam and the 555 flashes the led. Can you give me an idea how to achieve that?

    Did you know the name 555 comes from the 3 5k resistors used to create the oscillator? Great instructable btw. There seems to be a lot of disdain for 555 circuits but I absolutely love their simplicity.

    1 reply

    I did not know that. Thanks for sharing! They are great for a lot of things and yes, very simple to use.

    Thanks for sharing this video! Looks like a fun project. Welcome to Instructables!