ICI16• 13
17. Install R1, 100K ohm potentiometer [little orange top thingy marked
104], above C3.
18. Install C4, 1 µF electrolytic capacitor. Remember to orient the part by
the negative stripe and the ‘+’ sign on the board silkscreen.
19. Install R2, 1M ohm resistor [brown-black-green], above R1.
20. Install X1, 3.3149MHz crystal [metal can], to the left of C4.
21. Install C14, 0.1 uF ceramic disc capacitor [marked 104].
You’ll notice a silkscreened position for a resistor, R8. R8 is not needed; do
not install any part in this position.
22. Install H1, 3 pin header above J2.
23. Install Q2, BS170 power transistor, to the left of J2. Line up the flat spot
with the flat spot on the board drawing.
24. Install R20, 10K ohm resistor [brown-black-orange], above and to the
right of Q2. Install it vertically.
25. Install C12, 0.1 uF ceramic disc capacitor [marked 104], to the left of
R20.
26. Install C10, 0.01 uF ceramic disc capacitor [marked 103], above H1.
27. Install R12, 10K ohm resistor [brown-black-orange], above C12.
28. Install R13, 10K ohm resistor [brown-black-orange], next to R12.
29. Install R21, 10K ohm resistor [brown-black-orange]. Next to R13.
30. Install the IC socket for U2, above C10. Then, insert the 68HC908JK1
microcontroller. Line up the notch on the chip with the notch on the board
drawing. Be sure all the IC pins are in the socket and not bent under or out.
31. Install X2, 9.8304 MHz crystal [marked 98304], to the right of U2.
32. Install C9, 10 pF ceramic disc capacitor [marked 10], below X2.
33. Install R7, 1M ohm resistor [brown-black-orange], next to X2. Install it
vertically.
34. Install C11, 10 pF ceramic disc capacitor [marked 10], above R7.
35. Install R6, 220 ohm resistor [red-red-brown], above C11.
36. Install C13, 10 uF electrolytic capacitor, above R6. Watch polarity.
37. Install D1, LED, to the right of C13. You’ll note that the part has a flat
side on it and the silkscreen shows a flat side too. Orient both flat sides and
leave the LED up off the PC board as far as you need to so that you can
see it later when you’re programming.