Pin
Description
JP1-9
Analog input #1
JP1-10
Analog input #0
JP1-11
+5V
RB0
Digital input/output #0
RC4
Digital input/output #1
RC5
Digital input/output #2
RB3
Digital input/output #3
RB4
Digital input/output #4
RB5
Digital input/output #5
ICSP-5
Digital input/output #6
ICSP-4
Digital input/output #7
Board assembly is straight forward. Install the shorter components such as the IC1 socket and IC2 first. Then
install the smaller components such as the reset jumper, X1, R1, etc. Finally, install the larger components such
as IC3 and J1. You can wire a source of 8-12V to the Vin and GND pins or use the supplied 9V battery
connector. Since the 9V battery wires take stress, you should solder both sides of the wire and you may wish to
provide strain relief such as a drop of hot glue over the wires.
The only polarity-sensitive components normally placed on the board are the ICs, the LED, and the large
electrolytic capacitor. The capacitor is clearly marked as are the ICs (IC3's metal back side is closest to the edge
of the board). The flat side of the LED (D1) is the ground side, so the long lead goes in the other hole.
Although
it is customary to put the body of the resistors in the hole that has the white circle around it, putting one in backwards will
not affect circuit operation. Also, it is customary to put the ceramic resonator or crystal so that the markings face away
from IC1, but putting it backwards will not affect circuit operation.
Normally, C1-C4 are not polarized capacitors. However, if you use polarized capacitors the negative side of C1, C3, and
C4 are all to the right as you read the markings correctly. That is, if you consider the DB9 connector “up” and IC1 is on
the right, the negative leads of C1, C3, and C4 are to the right. C2's negative lead is to the bottom using the same
orientation (that is, facing the LED).
JP2 and JP3 mirror the inner pins of JP1 (that is JP2-1 and JP3-1 are connected to JP1-2) and are connected together along
the top side of the board. If you wish to customize what signals appear on JP1 you can use a hobby knife or razor blade to
carefully cut the traces between JP2 and JP3. Then you can use wire to connect JP3 to a different connection, or pick up
the signal that used to go to JP1 in the JP2 hole. For example, if you wanted JP1-2 to connect to digital I/O #7 you could
cut the trace between JP2-1 and JP3-1 (which correspond to JP1-2) and jumper JP3-1 to ICSP-4.
-9-
P
in
1
P
in
1
+
+
+
+
