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Motion Sensor and LED's - How to Make Circuit

Discussion in 'Electronic Design' started by Sizz, Mar 5, 2007.

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  1. Sizz

    Sizz Guest


    Im having some difficulty trying to make a circuit.
    I want to create a desk lamp which only switches on/off when you wave
    your hand across the sensor.

    I will be using
    4x AAA batteries 1.5v Each 1150mAh
    8 LED 3.6 Forward Volts - 20mAh
    120 ohm Resistors

    Not sure about the sensor and other components..

    Please can someone help me specify the materials and circuit layout.

  2. D from BC

    D from BC Guest

    Maybe try an infrared phototransistor and infrared LED cct for motion
    D from BC
  3. Wim Ton

    Wim Ton Guest

    I have seen some clever circuits (probably in EDN design ideas) that used
    the LED's as a photodiode as well

  4. Guest

    I would suggest AA cells over AAA cells.
  5. Guest

  6. Rich Grise

    Rich Grise Guest


  7. Rich Grise

    Rich Grise Guest

    Sure, for US$60.00/hr.

    Good Luck!
  8. Guest

    I thought that for a second, but ckt is more common, though probably
    less correct.
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