Argent OpenTracker, User Manual

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2. OpenTracker Assembly Notes
Table 1 – Parts List
Part Description Notes
U1 MC908KX8 MCU with socket Reference notch faces left
U2 78M05 Voltage Regulator Install first
U3 LM335Z Align to silkscreen outline
R1, R7 10 K resistor Brown ‐ Black ‐ Orange
R2 220K resistor Red ‐ Red ‐ Yellow
R3 2.2K resistor Red ‐ Red ‐ Red
R4 1K resistor Brown ‐ Black ‐ Red
R5 3K resistor Orange ‐ Black ‐ Red
R6 6.8K* resistor Blue ‐ Gray ‐ Red
R8, R9 10K potentiometer Align pins to holes
R10 10M resistor Brown ‐ Black ‐ Blue
R11 20K resistor Red ‐ Black ‐ Orange
JP1 10 ‐ pin header Single row .100 pins
C1 0.33uF capacitor Yellow with “334” marking
C2 ‐ C4 0.1uF capacitor Yellow with “104” marking
C6, C7 18pF capacitor “180” or “180j” marking
Q3, Q4 2N7000 transistor Align to silkscreen outline
D1 ‐ D2 1N914 or 1N4148 diode Black band denotes cathode
LED Red LED Short lead faces toward R4
X1 DB9 Connector ‐ female Left edge of board
X2 DB9 Connector ‐ male Right edge of board
Y1 29.4912 MHz crystal Bend down to PCB before soldering
* A 6.2K resistor (Blue ‐ Red ‐ Red) may be substituted for R6
The OpenTracker kit requires basic to intermediate level soldering skills. You will need a low ‐
wattage soldering iron, wire cutters, and solder. Rosin core solder is recommended – never use
acid core solder for electronics.
Review the parts list and identify the components you received. If any are missing or damaged,
contact support@n1vg.net for replacements. Don’t worry if your kit includes extra resistors or
other parts not listed above – these are provided for modifications and alternate versions of the
kit.
U2 is a surface mount device and should be installed first for ease of soldering. Apply a small
drop of solder to one pad and keep it melted while you align the part. Solder the other leg and
the metal tab at the top, making sure that the solder forms a good junction between the tab and
the circuit board for proper heat transfer.
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