Schematic Question

Discussion in 'The Projects Forum' started by prescott2006, Feb 27, 2010.

  1. prescott2006

    Thread Starter Active Member

    Nov 8, 2008
    72
    1
    1. What does the capacitors in the red rectangle do? I do not see the capacitors connect to other component.
    2. can i use the frequency counter to display the pitch frequency? input to electret microphone then enter the frequency counter.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    The capacitors are used as decoupling capacitors for the PIC. They supply the high frequency switching currents required by the PIC.
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    What you have here is a typical shorthand technique that is used in schematics. Labels are used rather than overt connections to lines on the schematic. This is done to cut down on the clutter that comes with having a bunch of lines on the schematic.

    hgmjr
     
  4. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    If you use an electret microphone then its level is so low that it needs a preamp circuit.
     
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