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Electronic Doorbell Circuit using a 555 and CD4017

Electronic Doorbell Circuit using a 555 and CD4017

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  •  January 30, 2021
  •  Electronic Doorbell Circuit using a 555 and CD4017
  •  Posted by Marcel at 8:24 am
  •  No Responses
  •  555 Timer Circuits
  •  Tagged with: 4017, ujt

Electronic Doorbell circuit that lets know that someone is at the door. Made with 555 timer and 4017 decade counter allowing to change the tone of each note

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How to make a Police Style Strobe Light Circuit?

How to make a Police Style Strobe Light Circuit?

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  •  April 9, 2019
  •  How to make a Police Style Strobe Light Circuit?
  •  Posted by Marcel at 10:27 am
  •  No Responses
  •  LED Circuits
  •  Tagged with: 4017

This circuit shows the familiar lights which are used on police cars. It uses a 555 timer as a clock for the 4017B decade counter, two transistors and twelve LEDs

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