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wireless doorbell hack

Discussion in 'General Electronics Discussion' started by demon07, Mar 6, 2010.

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  1. demon07


    Mar 6, 2010
    usb relay controller

    Hi, new user here.

    I've got an idea for a small project and I'm trying to figure something out. Basically I want the PC to control a relay to turn on an appliance. I've got a few options, among them include:

    - RS232: Using serial to activate a relay, but then I would have to externally power the circuit
    - USB: Would be ideal because provides a +5V supply and communication for the relay circuit, but it seems way more complex to just send a simple signal to the relay circuit
    - Premade Relay Controllers: I'm trying to avoid this, just to learn a bit more on my own.
    - RS232 for control, USB for power: Technically this should be easy, but I'd really like to just use 1 USB port for this task.

    Anyone with USB interface experience have any advice?
    I'll update as I learn more.

    EDIT: got it working.. sweeeeet!!! <sarcasm>thanks for all the help!</sarcasm>
    Last edited: Mar 22, 2010
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