• DPDT miniature switch.
• Female DB9 and shell for com port connection.
• Cable, approximately 6.5 feet (2m).

 Quan.    Part              Ref. Designators
---------------------------------------------
   2     0.01 ufd                C1,C2
   1     0.1  ufd                C3
   2     470 ohm                 R1,R2
   6     10K ohm                 R3,R4,R7-R10
   1     33K ohm                 R5
   1     1K ohm                  R6
   2     1N4148                  D1,D2
   2     2N3906                  Q1,Q2
   2     2N3904                  Q3,Q4
   1     18-pin DIP socket       U1
   1     programmed PIC16C620    U1
   1     4 MHz resonator         Y1