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Doorbell for Deaf People Circuit using LEDs

Doorbell for Deaf People Circuit using LEDs

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  •  January 20, 2021
  •  Doorbell for Deaf People Circuit using LEDs
  •  Posted by Marcel at 8:30 am
  •  No Responses
  •  Alarm Circuits
  •  Tagged with: 4001, oscillator

Doorbell for Deaf People.

When a deaf person is alone in a house, it would be very difficult to realize that someone is knocking on the door without any visual warning signal.

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