Copyright 2004, 2005, 2007 Sphere Research Corporation Nixie Clock Kit Instructions Page 5
Caution:
The
Microprocessor
(
UP1
) is very
static sensitive
, install it into the socket as the
last step, and ONLY after you have made all the required tests on the power supply. Ground
yourself to a grounded object before handling the IC, and
never touch the board to
something before you have touched it first, to avoid static discharge though the chip.
FIRST:
This kit requires an
external Power
Supply
, you should select that FIRST, and test it
before attempting to assemble and test this kit. A
12VDC or 12VAC wall wart is ideal, with at least a
1A rating, or you can use a source up to 16VAC/DC,
but you will then have to install the secondary on-
board 12V regulator to run the HV converter. If you
bought a supply from us, it will be a nominal 12VDC
supply, with a barrel style DC power connector.
Check to confirm it is positive on the center
conductor (may be up to 16VDC if unregulated and
no load), and working before proceeding. Be sure it
mates with the supplied DC power connector at J2.
Using our supplied 12VDC power supply, the on
board 12V regulator and rectifier are not
required, and they are jumpered out at U10 Input
to output), D1 and D5. This routes input power
directly to the internal 12VDC bus.
WHAT DISPLAY?
This kit can interface to many tube types, but the board patterns are tube-specific.
The combined board drives IN-14 nixies, but others with flying leads can be used, IF the pins are matched to the
board layout. Remember that the layout is marked by FUNCTION, not pin number, for your convenience. It is
possible with minor lead changes to run IN-16 tubes in the same layout in all or some (such as seconds)
positions. Check our website below for tube basing information before you attempt a tube change.
http://www.sphere.bc.ca/test/nixie.html
On the remote boards, either sockets or tubes with flying leads can be used, but note that the socket pattern fits
only specific socket types, and a tube does not fit directly into the holes.
WHAT TIMEBASE?
This kit supports 4 possible modes, 3 internal, and one external. Internally, either a
simple quartz crystal can be used (Y1), or one of two different temperature stabilized oscillators from Maxim
(DS32KHZ) in SMD or DIP format. Note that in the initial board layouts, the over-sized DIP package interferes
with the J9 header (it can be mounted on the bottom to avoid this interference). This clearance will be fixed on
later revisions. Externally, a remote source of CMOS/TTL compatible 32.768KHz data can be sent to the J8 EXT
clock pin. USE ONLY ONE TIMEBASE SOURCE.
The default is crystal Y1, the temp stabilized oscillators
are an upgrade to the kit.
Содержание U6DNC Series
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