Pic Hardware Circuits

Discussion in 'The Projects Forum' started by RodneyB, Aug 20, 2013.

  1. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
    633
    13
    I am building a project based around a PIC12F675

    Basically its using a motion sensor to detect movement and when it does turns on the Light for 15 minutes then off. It is Only to work at night thus the LDR input as shown on the diagram.

    I need to know if there are any additional components needed to stop false triggering or interference from the mains or wireless equipment.

    Thanks

    Rodney
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,553
    2,375
    I would add a couple of de-couplers, put a .01μf as close as possible to the PIC supply pins, also a 10μf across the 5v supply.
    Max.
     
    RodneyB likes this.
  3. tracecom

    AAC Fanatic!

    Apr 16, 2010
    3,869
    1,393
    I agree, but I use .1μF ceramics across the power pins.
     
    RodneyB likes this.
  4. RodneyB

    Thread Starter Active Member

    Apr 28, 2012
    633
    13
    Thank You very much for the advice I have done exactly as you have suggested.

    Thank you

    Rodney
     
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