Motion Detectors with Infrared Sensors


Posted on Feb 6, 2014

Motion detectors often we hear, is to use ultrasonic sensors, the advantages of this sensor is sensitive and rapid response. But the main problem is that sometimes these sensors also respond to vibration in the environment, such as a passing car or plane sound, which resulted in an error response that we did not expect. This can be overcome by usi


Motion Detectors with Infrared Sensors
Click here to download the full size of the above Circuit.

ng active infrared sensors. The basic concept is similar to an ultrasonic sensor as shown below: As transmitter Photodioda out pulses of infrared light with a certain frequency 5KHz, then reflected by the reflector in front of him. and received by the phototransistor as the receiver. The detected object is located in between the transmitter-receiver with a reflector. The following is a schematic drawing: Circuit on the left is the transmitter circuit that produces an infrared pulse modulation 5KHz. On the right side (receiver circuit) there is resonance tuned amplifier  that we can control bandwidth in order to capture the pulse modulation transmitter 5Khz. Bandwidth control also serves to reduce the sensitivity to the effects of light around him.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    DPP adds versatility to VFC
    Touch on-off switch
    Common Collector Colpitts Oscillator
    how to make 18 led light chaser circuit
    ictd92
    Remote Controlled Fan Regulator EEE Project Report
    LED Matrix Kit
    10 Mhz QRSS Beacon
    Electrical modeling of a nanopore measurement
    NE5534 Integrated Circuits
    As control the discharge tube type delay circuit
    Electronic switching preamplifier



    Top