beam break detector for camera shutter or flash control


Posted on Feb 6, 2014

The IR detector (IC3) controls an LM 7555 CMOS timer (IC2) which operates in mono stable mode. When the beam is broken, IC2 is triggered and its pin 3 output goes high for about half a second. This extinguishes LED1 and turns on transistor Q1 to drive a 5V low-power relay..


beam break detector for camera shutter or flash control
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Polarity changer Switch
    Automotive ignition coil
    Photovoltaic Power System and Wiring Module Interconnection
    Dynamic Microphone Preamp
    amplifier Amp measures board twist (unfortunately!)
    hv neon lamp multivibrator
    tda2822 stereo amplifier circuit
    Speech amplifier circuit
    Automated Attendant burglar alarm circuit



    Top