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PPM3 Page 18
We’ll skip T1 for now and come back to it later.
46. Install C31, 47nF (marked 473).
47. Install D2, 1N4148 diode (orange glass body with a black band).
Orient the black band with the band marked on the silkscreen and PC
board layout.
48. Install D1, the last 1N4148 diode (orange glass body with a black
band). Again, make sure you line up the black band on the part with the
silkscreen marking for the part.
49. Install C1, 10uF electrolytic. Remember to line up the positive lead
correctly.
50. Install R31, 4.7k ohms (yellow-violet-red).
51. Install C16, 2.2nF capacitor (marked 222).
52. Install C30, the last 1uF electrolytic capacitor. Watch the polarity when
installing.
53. Install C11, 10nF (marked 103).
54. Install C6, a 10uF electrolytic capacitor. Follow the silkscreen for
proper orientation (again!).
55. Install R4, 100k ohms (brown-black-yellow).
56. Install C13, 10nF capacitor (marked 103).
57. Install C14, 10uF electrolytic. Don’t worry; I’ll only remind you about
polarity on one more of these parts. But like your parents always said
when they gave you advice as a kid, you’ll thank me later.
58. Install C33, 5.6nF (marked 562).
59. Install R9, 39k ohms (orange-white-orange).
60. Install C15, the last 10uF electrolytic. Oh go ahead, you know you
have to make sure you install it correctly!!
Well, the regular parts and the surface mount parts are in; now we’ll tackle
some of the larger components. Then we’ll be moments away from firing up
your new kit and seeing what it can do. One note on the large parts though.
Be sure you have them seated flat on the PC board and that you thoroughly
solder all connections. You’ll want strong solder joints for good mechanical
connections and if these parts aren’t seated properly they will not be robust
You’ll also have trouble when you put the kit in the case because things won’t
line up. A little care now will save a lot of heartache later. Oh, by the way, I
know that the LEDs are rather small but we saved them for later so they
wouldn’t be flopping around while you flipped the board over and back a
million times during construction. They’re so bright and perky we thought we’d