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TI APP NOTE NIXIE CLOCK
6 digit IN12 60Hz line frequency logic
clock
(Schematic
/
50Hz Conversion /
BOM /
Kit labeling
)
(USPS First Class Worldwide Shipping
included) |
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TI APP Note Clock PWB
6.00" x 3.25" double sided board, solder mask and silk
both sides
Item 1 on the
BOM, not included in
the parts kit |
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1384
Circuit Board Only |
$8.95 |
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TI APP Note Clock Parts Kit
Items 2-28 on the
BOM |
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1384-K
Tubeless Clock Kit |
$81.95 |
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7441 HV Driver ICs
(x5)
Item 26 on the
BOM, included in the
parts kit |
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APE1F-2M-10-Z (x5)
Item 27 on the
BOM, included in the
parts kit |
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IN12A Nixie Tubes (x6)
Item 29 on the
BOM, not included in
the parts kit |
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Power Plug
5.5mm OD x 2.5mm ID
CUI
Inc
PP3-002B
Item
31 on the
BOM, not included in
the parts kit |
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Nixie Power
Supplies
Item
28 on the
BOM, included in the
parts kit!
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Nixie Tube Sockets
72 pcs, Item 30 on the
BOM, not included in
the parts kit
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Description (Schematic
/
BOM
/
Breadboard) |
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This is a simple hard logic Nixie clock based on a data
book application schematic from the mid 1970's illustrating the use of
Texas Instruments' 74141 BCD-Decimal nixie decoder-driver IC's. A
few modifications from the original design were implemented:
- A 5V series regulator instead of the original zener
shunt circuit for powering the logic.
- Neon lamp drive for the AM/PM indicators.
- Zeroing was added to the line frequency prescaler
and 1's digit during setting.
- The high voltage transformer input has also been
replaced by a boost
supply for the anode 170V supply.
- An error in the seconds 10's connection between the
decoder and display was corrected.
- All through hole parts except the capacitors which
are 1206 ceramic SMT and the power input connector; see the SMT soldering tutorial
here. A right angle through hole power connecter can
alternatively be installed on the SMT pads:
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IN12's have been used in the design but this will work
with any nixie display, the cathodes for each tube are marked on the PWB
for easy wiring. Components are also labeled with their values for
easy assembly.
Input power is 9VAC @ 500mA, suggested AC output wall adapters
and connector...
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