Copyright 2004, 2005, 2007 Sphere Research Corporation Nixie Clock Kit Instructions Page 17
13.
Install and solder the crystal, Y1, next to the microprocessor. It looks like a tiny metal cylinder, with two
leads out one end. It may have the frequency or a code like R38 on it
. Either Y1, or U7 or U8 are
required for the clock to run
, or an external timing signal attached to J8
.
One crystal/osc.
Ð
required
14.
Install and solder the 5V indicator Led at LED1 using an elevator spacer, note that the LED has a flat on
one side of the plastic case, this is the cathode (it’s also the shorter lead), and should go to
the square
pad
on the board. Leave the LED spaced a bit above the board, too much heat will destroy the LED.
Repeat the process at D101 for the second green LED
.
15.
Install and solder the short (3AG) Neon lamp at DS3 using a spacer, this is the warning lamp for High
Voltage on the board.
Whenever it is lit, dangerous HV is present on the board.
16.
Before going further, inspect every solder joint, re-soldering if needed, and completely clean the board.
The assembly is now complete, except for inserting the ICs (which are static sensitive), and the Nixies
(which are very fragile). Solder all vias (the through-holes that do not have a component lead going
through them), to improve the reliability of the board. Install the headers at J9, J10 and J11 if a remote
display is to be used. They can be top or bottom mounted.
17. It is time to do some initial tests.
Install the timer IC at U100. Plug the wall wart into jack J2, and apply
power. The green LEDs should both light (5V DC power and HV converter Power), and a voltmeter test
at J7 to ground (J5) should show +5VDC, a test at J6 (RAWDC, the input power bus) should show about
+12VDC, and a test at J1 should show high voltage. DS3 (neon lamp) should be lit, and you can adjust
R104 for +170VDC at J1.
If any of these steps is not possible, stop and examine the circuit in
question. You cannot proceed until all of these power tests are satisfactory.
Examine the IN-14 Nixies, they have a bottom spacer pad, and
long leads. Normally, they are mounted flush with the board, and
the spacer pad provides a shock isolating cushion. When
installing them into the board, you need to be sure they are
vertical in all axes (not tilted), and the same height as the other
tubes, for a clean looking display.
When the tubes are correctly facing forward, the one internal lead
with white insulation will be in the pad marked A at the rear.
Examine the tubes and the board, and be sure you understand
the correct orientation of the tube, it has no gap between pins to
aid this, you have to align it for the correct location. The digits
must be forward, and the white insulated pin must be in pad A.
If you intend to use the LED back lighting board under the
tubes, you must remove the white insulator before soldering
the tubes, and use a spacer to raise them all ¼” above the
board.
Содержание U6DNC Series
Страница 6: ...Copyright 2004 2005 2007 Sphere Research Corporation Nixie Clock Kit Instructions Page 6 ...
Страница 7: ...Copyright 2004 2005 2007 Sphere Research Corporation Nixie Clock Kit Instructions Page 7 ...
Страница 8: ...Copyright 2004 2005 2007 Sphere Research Corporation Nixie Clock Kit Instructions Page 8 ...
