Remote Doorbell Warning Switch circuit


Posted on Feb 6, 2014

It is quite easy to miss the sound of a doorbell if you are watching TV, this circuit gets round the problem by providing a visual indication, i. e. a lamp. As an alternative, a LED could also be used. You could just parallel a lamp across the doorbell, but this would mean extra drain from the doorb


Remote Doorbell Warning Switch circuit
Click here to download the full size of the above Circuit.

ell batteries or transformer. Using a series resistor R1 actually reduces current flow, and if run from batteries, will give them a longer life. The value of R1 is chosen so that about 0. 6 to 0. 7 volts is dropped across it, and the doorbell should still ring. I used a combination of a 22 ohm resistor in parallel with a 50 ohm. The doorbell still rang and circuit operated correctly. I used to have an electromechanical counter that registered each time when someone pressed the switch. in fact, I remember a time when I had more "hits" at my doorbell then at my web site=:)




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    TDA1554 / 22W Stereo Amplifier
    Lead-Acid Battery Charger
    10Mhz universal counter
    Low-power-rs-232c-driver
    PIC Traffic Lights
    Circuit Design And Technology
    dac 08 as digital potentiometer
    multivibrator astable
    Connecting Infrared Thermometer MLX90614
    dual led flasher by 2n2907
    Op Amp 741 Inverting Amplifier Circuit Simulation with output wave form and working
    Automated Pet Door
    Four phase stepper motor drive system



    Top