Paralleling remote control buttons for a toy car with 12F675 circuit.

Discussion in 'The Projects Forum' started by willums, Feb 21, 2015.

  1. willums

    Thread Starter New Member

    Feb 21, 2015
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    With pic power off, the RC buttons are seemingly connected to each other from inside the pic. Are the pins internally connected at power off and can I avoid this?
     
  2. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    The input pins would be likely to have a diode each connected to the power pin as a safety for the inputs. Does this idea match what you're seeing?

    With no voltage on the power pin, the diodes will only cause 5 or 6 tenths of a volt difference.
     
  3. willums

    Thread Starter New Member

    Feb 21, 2015
    2
    0
    Thanks AAC When one RC button is pressed (providing an earth) then other functions are initiated, which means a common earth is provided from the pic pins.
     
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