Dieter's
IN-1 / LC-516
Nixie Clock Project
last update, and finished:
September-23-2005
GERMAN
VERSION OF THIS PAGE
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This project was based on the
circuit I used in my first IN-18 clock.
If you don't know it, you can find it here.
What I had in mind when I starded project was:
THE IN-1
NIXIE TUBE
You find all technical data of
this tube HERE!!!
Pinout/ Drawing:
THE LC-516 (Dolam) NIXIE TUBE
You find all technical data of
this tube HERE!!!
Pinout:
Technical Data- Overview:
Röhrendaten/ Tube Data | ||||
German | English | |||
Typ | Type | IN-1 | LC-516 | |
Hersteller | Brand | Reflector/ Sovtek | Dolam | |
Vergleichstypen | Substitudes | - | - | |
Ansicht | View | kopfseitig/ end-view | kopfseitig/ end-view | |
Symbole | Displayed Symbols | 0-9 | 0-9 | |
Symbolhöhe | Symbol Height | mm | 18 | 15.5 |
Durchmesser | Diameter | mm | 35 | 35 |
Höhe gesamt | Total Height | mm | 65 | 65 |
Pindurchmesser | Pin Diameter | mm | 2.36 | 2.36 |
min. Betriebsspannung | min. Supply Voltage | V | 170 | 170 |
typ. Brennspannung | typ. maintaining Voltage | V | 133 | 124 |
Betriebs- Kathodenstrom | Typical Cahthode Current | mA | 2.5 | 2 |
Sockel | Base | U11 | U11 | |
Fassung | Socket | U11 oder Einlötbuchsen 2.36mm/ U11 or Pin Receptacles 2.36mm | U11 oder Einlötbuchsen 2.36mm/ U11 or Pin Receptacles 2.36mm |
The
Schematic
Click on the image to
enlarge!
Lower left you can can see the switch mode power supply, which is
powered by a 12VDC/1A power supply.
I used the very common MC34063A switching regulator. The
power supply generates the 170VDV plate voltage for the Nixies.
Beneath on the right you see the Atmega 8515. It contains the
software and manages all jobs in the clock.
For this clock I used the Dallas RTC DS1302.
This Real Time Clock has an external crystal. The accuracy of the
clock depends to the accuracy of this crystal. The RTC is
puffered by a Lithium Battery which lasts more than 10 years. The
Time and Date will be stored when no power iss supplied to the
clock.
For the drivers I used the 74141 TTL ICs.
Here you can see the voltage and current- diagrams of the switch mode power supply:
After the schematic was developed, the Layout cut be routed:
After the layout was done, I
made some boards.
Here you can see top and bottom:
Here the equipped board:
The Clock with IN-1 Tubes:
The Clock with LC-516 Tubes:
The plate rersistors must be
matched to tubes in use of course.
The tubes are mounted in sockets, so they easily can be replaced.
The Clock with IN-1 Tubes in the Case:
The Clock with LC-516 Tubes in the Case:
THE CODE
The code was done in C++
A crossfading- feature was implemented in the code, so the digits
can be faded from one to the next.
Unfortunately this nice feature can not be catched in pictures.
Features of this Clock:
Here you can download the user manual of the clock: USER MANUAL.PDF
Thank you for reading and have much fun by playing around with nixies.
Yours, Dieter
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Schlüsselwörter: nixie nixieröhre nixieröhren röhre röhren tube tubes buizen indicator numerical vfd vacuum clock nixieclock uhr readout