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Garage door opener

Discussion in 'Microcontrollers, Programming and IoT' started by Paranoid, Nov 17, 2018.

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  1. Paranoid


    Nov 17, 2018
    I have an electrically operated garage door which I would like to connect to the internet so it can be remotely operated.
    In the control box there are labelled connectors for connecting push buttons: one to open and one to close the garage door.
    I've measured the voltage across these connectors and its 2.44V.
    I plan to use an ESP-12E with Tasmota firmware and connect a couple of the GPIOs to to the bases of PN2222 transistors with the collector and emitter wired to the switch contacts.
    Since I know very little about electronic circuitry, and I don't wish to fry the control box, I would be grateful if somebody could let me know if this is likely to work.

  2. Minder


    Apr 24, 2015
    Why not use a opto isolator,?
    4n35 for e.g.
    Paranoid likes this.
  3. Paranoid


    Nov 17, 2018
    Mainly because I didn't know about them. My last electronics course was in the late 70s!
    Thanks for the tip, it looks like a good solution.
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