J+ O__
      |
   P1 %__|[]|_
      |  Pz1  |
J- O__+_______|

+-----------------------------------+-----------------+
|Papa Vince                         |ESiA-PLND:REV    |
+-----------------------------------+-----------------+
|Cigar Box Guitar piezoelectric pulse detector        |
+-----------------------------------------------------+
| J+ - Jack plug signal pin                           |
| J- - Jack plug ground pin                           |
| P1 - preferably 1kOhm(not a requirement)            |
| Pz1 - piezoelectric element                         |
+-----------------------------------------------------+