555 timer Door minder electronic project circuit diagram


Posted on Feb 4, 2014

This door minder electronic project is based on a 555 timer circuit and uses an IR beam to monitor door and passage-ways or any other area. When the IR beam is broken a relay is tripped which can be used to sound a bell or alarm. This door minder electronic project is suitable for detecting customers entering a shop, cars coming up a driveway, etc


555 timer Door minder electronic project circuit diagram
Click here to download the full size of the above Circuit.

. Because the IR beam is very strong distances over 25 yards can be monitored with electronic circuit. The receiver module consists of an IR receiver module that detects the incoming beam from the transmitter. The IR signal is used to keep a capacitor charged which in turn holds a relay operated. When the beam is broken the capacitor discharges and the relay releases. This circuit must be powered from a 12volt DC supply.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    8 LED Effects using PIC16F84A
    Simple Code Lock
    Small wattage Inverter (Inverter Circuit For Soldering Iron)
    controller
    IDE interface project
    A Smart Barn Door Drive for Astrophotography
    22kW and below hoist with Y- transfer power-saving circuit
    Integrated operational amplifier tone control circuit of a simplified equivalent circuit a
    Ultra High Sensitivity Metal Detector Circuit



    Top