Copyright 2004, 2005, 2007 Sphere Research Corporation Nixie Clock Kit Instructions Page 15
4.
Insert and solder the IC sockets, note that one end is notched, to mark the similarly notched/marked end
of the ICs themselves (pin 1 end). Be sure the sockets are fully tight to the board (insert, then bend over
the corner pins to make it grip the board). The UP1 microprocessor socket has gold machined pins. A
blue-green ZIF socket is shown in some pictures, but that was used only during prototyping, the normal
socket is the machined pin type (black) shown on the split board picture.
5.
Insert all the 0.1uF bypass capacitors and solder them, they can be either white marked with text as
shown or brown dipped radial parts, marked 104. C13 can be either 0.1uF or 0.01uF, not critical, and is
used ONLY with an AC supply. Install the switcher timing capacitor at C104, 2.2nF.
6.
Insert and solder the large flat supercap at C11, check polarity carefully, the can is negative (striped end),
the isolated pin is positive.
7.
Insert and solder the polarized capacitors,
note the polarity
, if a can type, it will have the negative side
marked with a stripe. If a dipped tantalum, it may have a line and sometimes a tiny plus sign at the +
terminal. The board has a + marked for the positive side of every capacitor, it is VERY important that all
be installed correct, double check the polarity of every part. C102 and C103 are especially critical, see
the pic below, and note the negative stripes and their orientation:
8. Q100 (MOSFET) can be damaged by static discharge, so handle it carefully
, and attach it to the
board with the provided screw and nut, the HEAD should be on the board BOTTOM side, to avoid a short
to the adjacent track. Solder and trim the leads, and attach the toroid choke L101 as shown above, the
leads just reach to the holes. A dab of glue or RTV to anchor the choke is useful. Install the trimpot at
location R104 as shown above, it will be adjusted from the board edge. Install the provided ferrite bead
(has wire leads) at location L100, it may be a big or small bead.
9.
Insert and solder the
smaller
polyswitch fuse at
F100
(looks like a small yellow disk capacitor). You can
lift one lead of the polyswitch and insert an ammeter to monitor the HV inverter current consumption if
you have a problem in this area.
Содержание U6DNC Series
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