infrared IR proximity detector/ IR beam barrier circuit diagram


Posted on Feb 6, 2014

The circuit uses the very popular Sharp IR module (Vishay module can also be used). The pin nos. shown in the circuit are for the Sharp & VIshay modules. For other modules please refer to their respective datasheets. The receiver consists of a 555 timer IC working as an oscillator at about 38Khz (also works from 36kHz to 40kHz) which has to be adj


infrared IR proximity detector/ IR beam barrier circuit diagram
Click here to download the full size of the above Circuit.

usted using the 10K preset. The duty cycle of the IR beam is about 10%. This allows us to pass more current through the LEDS thus achieving a longer range. The receiver uses a sharp IR module. When the IR beam from the transmitter falls on the IR module, the output is activated which activates the relay and de-activated when the beam is obstructed. The relay contacts can be used to turn ON/OFF alarms, lights etc. The 10K preset should be adjusted until the receiver detects the IR beam. The circuit can also be used as a proximity sensor, i. e to detect objects in front of the device without obstructing a IR beam. For this the LEDs should be pointed in the same direction as the IR module and at the same level. The suggested arrangement is shown in the circuit diagram. The LEDs should be properly covered with a reflective material like glass or aluminum foils on the sides to avoid the spreading of the IR beam and to get a sharp focus of the beam. When there is nothing in front of them, the IR beam is not reflected onto the module and hence the circuit is not activated. When an object comes near the device, the IR light from the LEDs is reflected by the object onto the module and hence the circuit gets activated.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Increasing the power rating of zener diodes
    Composite-amplifier
    Multi-Tester Logic Probe Signal Tracer And Injector
    Arduino RFID Door Lock
    Noise-producing sound effects using NE555
    power-amplifier 2
    H-Bridge Transistor Smoking (Bipolar BJT Transistor)
    16 led46 led circuit combination
    infrared or ultrasonic
    mjr7 mk3 mosfet audio power amplifier 70w
    TRF1115 RF Down-Converter
    LA4440 audio amplifier circuit design electronic project
    Variable inductor
    Common mode signal of emitter-coupled differential amplifier circuit a



    Top