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Thread: Making a doorbell

  1. #1
    Junior Member
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    Apr 2019
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    Default Making a doorbell


    Would you please help me rank the options, according to easiness and price, for doing the following using Java?

    I need to receive input from a device. Iím not sure what this device is called yet, but I know it can make a lot of other devices (such as public sinks, paper towel dispensers, and air hand dryers) touchless. It can make them touchless because it knows when something (such as a hand) is waved in front of them. Because I donít know what this device is called, Iíll refer to it as the first device.

    I need the sound of my voice to be played when something is waved in front of the first device. I also need the amount of time after something is waved in front of the first device to be kept track of. Please call this amount of time ďxĒ. And, I need the sound of my voice to be played, with a changed volume, when something is waved again in front of the first device, AND when x is greater than one amount of time, AND when x is lesser than another amount of time.

    In addition to a speaker that plays the sound of my voice, I also need another output device, a light (whose brightness I can change). I need these two output devices to be far away from the first device.

    Would changing the code of a musical doorbell be a good shortcut?

    Thank you!


  2. #2
    Junior Member AlexSlater1234567's Avatar
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    Jun 2021
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    Default Re: Making a doorbell


    Just curious though, what are you referring to? Machine level programming? You can use the Ladder Logic language, or Structured Text language, they are to program the CPU to do something. Although you do need electromechanical engineering knowledge for it.

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