Some help with adapting a motion detector ?

Discussion in 'General Electronics Chat' started by curry87, Aug 14, 2010.

  1. curry87

    Thread Starter Member

    May 30, 2010
    101
    0
    I bought this http://www.maplin.co.uk/Module.aspx?ModuleNo=223593 pir detector however it will only work during night light levels and not day levels so i took it apart to try and find a light dependent resistor to see if i could trick it into working during day light levels however couldn't find such a component.

    Is there any hope in getting this detector to work in day light levels or is it hopeless ?
     
  2. marshallf3

    Well-Known Member

    Jul 26, 2010
    2,358
    201
    If it does only operate under nighttime light levels there's a sensor in there somewhere, it just may not look as you'd expect it to. Could look just like a TO-92 transistor or something with an integral filter so dark that it appears to be opaque.

    Try placing bits of black electrical tape over any suspected components until it starts working during the day.
     
  3. BMorse

    Senior Member

    Sep 26, 2009
    2,675
    234
    Can you post pictures of the inside circuit? maybe someone can spot the LDR....

    B. Morse
     
  4. curry87

    Thread Starter Member

    May 30, 2010
    101
    0
  5. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
Loading...