#555-timer
555-timer circuits ready to build, each with a parts list, a schematic and a picture showing how to connect it. Want to change something? Make your own copy in one click.
Newest circuits
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555 Timer: Blink LED
Here's how to build a simple LED blinker using a 555 timer. The 555 timer is configured as an astable multivibrator, which means the output will turn on and…
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555 Machine Gun
This "machine gun" circuit generates a sound that mimics the sound of a toy machine gun. It is based around a 555 timer IC in a feedback loop. Check out this…
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555 Timer: Police Lights
This project sets up two flashing LEDs, one red and one blue, to create a police lights effect. You can use this circuit to integrate into a toy, or just to…
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Blinking Holiday Lights
Blinking holiday lights are always fun. This circuit is easy to build and it’s something you can put to use right away. The blinking part of the circuit is…