Pvelectronics Frank 3 Guida alla configurazione

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

Assembly Instructions

And

User Guide

Nixie Clock Type ‘Frank 3’

Software version: 2.4

PCB Version: 04 Nov 10

(Crystal Timebase version

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

1 INTRODUCTION

1 1 About the clock

Nixie clock type ‘Frank 3’ is a compact design with all components and

tubes mounted on a single PCB. The efficient use of board space is

achieved by using a multiplex design to drive the display tubes. Only a

single high-voltage binary-to-decimal decoder IC (74141 is required, and

each tube is switched on in sequence very quickly to give the illusion that

all the tubes are actually lit.

The larger tubes for hours and minutes are type IN-12 with a digit height

of 18mm. The smaller tubes for the seconds are type IN-17 with a digit

height of 9mm. These tubes are Russian in origin and were produced

during the 1980’s, when the technology was at it’s most advanced. It is

expected that the tubes will last for very many years and should not need

replacing.

The optional wooden case and hardware pack (rear cover, screws ,

supplied rough-machined, can be finished to give a very attractive clock

for everyday living spaces. The quality of the final finish will reflect the

time and care that is taken to finish the wood with successively finer

grades of sandpaper. Alternatively, you may wish to design your own

enclosure for the clock.

1 2 Clock Features

Nixie clock type ‘Frank 3’ has the following features:

- Hours, Minutes and Seconds display

- 12 or 24 hour modes

- Date display in either DD.MM.YY or MM.DD.YY format

- Programmable date display each minute

- Uses a Quartz Crystal Oscillator as the timebase

- Optional DCF77,5 / WWVB / MSF synchronisation

- Supercapacitor backup. Keeps time during short power outages

- Simple time setting using two buttons

- Programmable leading zero blanking

- Five programmable neon colon settings (Flashing AM/PM indication,

illuminated AM/PM indication, both flashing, both on, both off

- Maintains time during setup mode, eg. When changing between

Standard Time and Daylight Savings Time

- Seconds can be reset to zero to precisely the set time

- Programmable night mode - blanked or dimmed display to save tubes

or prevent sleep disturbance

- Separate modes for colon neons during night mode

- Standard or fading change of digits

- All user preferences stored to non-volatile memory

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

1 3 SAFETY

DANGER: The clock pcb includes a switched-mode voltage booster

circuit. This generates nominally 170 Volts DC, but is capable of

generating up to 300 Volts before adjustment. Assembly may only be

undertaken by individuals who are suitably qualified and experienced in

electronics assembly, and are familiar with safe procedures for working

with high voltages. If in doubt, refer to a suitably qualified engineer

before proceeding.

The voltages generated by this circuit can give a potentially

LETHAL ELECTRIC SHOCK

DISCLAIMER: This product is supplied as a kit of parts, intended only for

suitably qualified electronic engineers, who are suitably qualified and

experienced in electronics assembly, and are familiar with safe

procedures for working with high voltages. The supplier, his agents or

associates accept no liability for any damage, injury or death arising from

the use of this kit of parts.

This is not a finished product, and the person assembling the kit is

responsible for ensuring that the finished product complies with any

applicable local regulations governing electrical equipment, eg. UL, CE,

VDE.

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

2 TOOLS AND EQUIPMENT REQUIRED

2 1 Tools required to assemble the PCB

The following tools will be required to assemble the PCB:

- Soldering iron with a small tip (1-2 mm

- Wire cutters (TIP: A small pair of nail clippers works very well for this

function

- Wire strippers (TIP: A small pair of scissors is quite suitable

- Multimeter

- Small flat screwdriver for adjusting the high voltage supply

2 2 Materials you will need

Solder – lead / tin solder is preferred. Lead free solder, as now required

to be used in commercial products in Europe, has a much higher melting

point and can be very hard to work with.

Desoldering wick (braid can be useful if you accidentally create solder

bridges between adjacent solder joints.

2 3 Other items you will need

The clock kit does not include a power adapter. This is because the kit is

sold to many countries around the world, each with very different

household mains outlet socket types. It is more efficient for the user to

buy a suitable adapter locally. This saves shipping a heavy adapter with

the kit, and also the extra costs of managing stocks of many varied

power adapters.

The type of power adapter can be obtained at very low cost. The

following type of adapter should be obtained and used with the kit:

Output 9-12V DC

Minimum power output capability of 250 mA

Output plug: 2.1mm pin

A suitable adapter is shown in figure 1 below:

Figure 1

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

3 LIST OF COMPONENTS

3 1 Table of components

Circuit Designation Part Description

Resistors

R1 390K, ¼ Watt

R2 4.3K, ¼ Watt

R3 100R, ¼ Watt

R4 5K6, ¼ Watt

R5 560R, ¼ Watt

R6 100R, ¼ Watt

R7 560R, ¼ Watt

R8, R9 10K, ¼ Watt

R10 33K, ¼ Watt

R11-R13 Not installed

R17

2K7

, ¼ Watt

R18, R19 5K6, ¼ Watt

R20 – R25 390K, ¼ Watt

R26 – R31 10K, ¼ Watt

R32

, R33

33K

, ¼ Watt

R34, R35 390K, ¼ Watt

R36 – R42 560R, ¼ Watt

Capacitors

C1 470uF, 16-25V, Electrolytic

C2 100uF, 16-25V, Electrolytic

C3 1uF, 250V, Electrolytic

C4 33pF ceramic

C5 33pF ceramic

C6 0.1F

C7 100nF ceramic

Transistors

Q1 IRF730 or IRF630 MOSFET

Q2, Q3 MPSA42 NPN

Q4 – Q9 MPSA92 PNP

Q10 – Q17 MPSA42 NPN

Diodes

D1 1N5819

D2 UF4004

D3, D4 1N5819

D5 – D8 1N4148

5mm Green LED

D10 3mm Orange LED

D11 – D16 3mm Blue LED

D17 Not installed

Integrated Circuits

IC1 7805 5V voltage regulator

IC2 PIC16F1936 8-bit Microcontroller

IC3 74141 / K155N Nixie driver

IC4 Not installed

Miscellaneous

L1 100uH – 470uH inductor

NE1, NE2 4mm wire ended neon lamp

SW1, SW2, SW3 Miniature push button

VR1 1K Potentiometer

IC Socket 28 Way IC Socket for IC2

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

GPS / RFT Socket 6-Way Mini DIN connector

J1 2.1mm Chassis power socket

SKT1-44 1mm Harwin solder-in socket

LS1 Piezo Sounder

Insulation Silicone Insulation for Neons

X1 32.768KHz Watch Crystal

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

3 2 Parts list / Packing sheet

Part Description Quantity

Resistors

100R, ¼ Watt 2

560R, ¼ Watt 9

2.7K, ¼ Watt 4

4.3K, ¼ Watt 1

5.6K, ¼ Watt 3

10K, ¼ Watt 8

33K, ¼ Watt 3

390K, ¼ Watt 9

Capacitors

470uF, 16-25V, Electrolytic 1

100uF, 16-25V, Electrolytic 1

1uF, 250V, Electrolytic

100nF, ceramic 1

33pF, ceramic 2

0.1F 1

Transistors

IRF730 or IRF630 MOSFET 1

MPSA92 PNP 6

MPSA42 NPN 10

Diodes

1N5819 3

UF4004 fast recovery diode 1

1N4148 4

5mm Green LED 1

3mm Orange LED 1

3mm Blue LED 6

Integrated Circuits

7805 5V voltage regulator 1

PIC16Fxxxx 8-bit Microcontroller 1

74141 / K155N Nixie driver 1

Miscellaneous

100uH – 470uH inductor 1

4mm wire ended neon lamp 2

Miniature push button 3

1K Potentiometer 1

28 Way IC Socket for IC2 1

Way Mini DIN connector

2.1mm Chassis power socket 1

1mm Harwin solder-in socket 44

Piezo Sounder 1

25 cm clear Insulation 1

32.768KHz Watch Crystal 1

It is recommended that the kit is checked against the list above, to

ensure all parts are present before commencing assembly. Don’t be

alarmed if there are some extra components, as some component

bags are shared between different kit types.

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

4 ASSEMBLY OF THE PCB

4 1 1mm Sockets For Nixie Tubes

There are 44 individual sockets that need to be soldered in. The

best method is a follows. Place all sockets into the holes, noting

that for each tube there is one hole that has no socket as show

below. When all sockets have been placed, place a flat and hard

object over the top of the sockets, and turn the PCB over so you

can solder from the underside. Be sure to insert the sockets FROM

the front side of the PCB – the side with the white component

markings. The photo below shows the solder side of the PCB after

all the sockets have been inserted and soldered in.

4 2 Capacitor C7

Mount C7 on the same side of the PCB as the white cross-hatched

markings for Q1 and IC1. See above.

Clip the leads on the main component side very short, as the IC

socket for IC2 will need to fit over the trimmed leads.

4 3 Diodes D1 – D8

pay attention to mount the correct diode type in the right place.

The black diodes have a white orientation band and the pink diodes

have a black orientation band. Place the diodes with the orientation

band aligned with the band marking on the PCB.

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

4 4 IC3 and socket for IC2

Insert the 28 way IC socket into the PCB at the IC2 position,

ensuring that the notch at one end is aligned with the

corresponding marking on the PCB. Insert IC3 directly into the

PCB. Solder both components in place, but do NOT insert IC2 at

this stage. This will be inserted at the very end of the assembly.

Refer the picture below.

Nixie Tube Clock ‘Frank 3’

www.pvelectronics.co.uk

4 5 Q3, Q10 – Q17 (MPSA42 Transistors)

Insert all the MPSA42 transistors as shown below. The PCB marking

shows how to orient the flat on the component body.

Important: Do not insert Q2 at this stage.

4 6 Q4 – Q9 (MPSA92 Transistors)

Now insert the six MPSA92 transistors as shown in figure below.

4 7 R1 – R11, R14 – R41

Note that R12 and R13 are not installed, and R42 is not installed

yet. These resistors, indeed all the resistors on the board need to

be mounted upright to save space. The leads need to be formed as

shown below. Bend the leads of each resistor as shown and solder

in to the correct postion, making sure the component body is as

close to the board as possible.

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