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Mode

Description

Values

0

Time mode.

 This is the normal mode and displays the time. It is the

normal start up mode of the clock. If you do nothing. The clock is in 

this mode.

In this mode a short press cycles through the values given in “Time 
Display Mode”, but always returns to the standard time display after

5 seconds.

1

Set minutes.

 Each short press will advance the minute. The 

minutes roll over back to 0 ffter reaching 59 minutes. Each time you
set the minute, the seconds is reset to 0.

2

Set Hours.

 Each short press will advance the hour. The hours roll 

over back to zero after reaching 12 or 24 (depending on the 12/24 

hours mode).

3

Set Day.

 Each short press will advance the day. The day roll over 

back to one after reaching the maximum number of days in the 
month.

4

Set Month.

 Each short press will advance the month. The month 

roll over back to zero after reaching 12.

5

Set Year.

 Each short press will advance the year. The year roll over 

back to 2015 after reaching 2099.

6

Fade Speed Slower

. Each short press will make the fade speed 

between digits slower.

Default: 50
Max: 200

Min: 20

7

Fade Speed Faster

. Each short press will make the fade speed 

between digits faster.

Default: 50

Max: 200
Min: 20

8

HV Generator Frequency Higher.

 This controls the internal 

frequency of the HV generator. The lower the number, the higher 

the frequency of the HV generation. Normally you will not have to 
adjust this, but with some tubes, adjusting it can stop “flickering” in 

the filaments.

Before leaving the clock for long periods with a new setting, check 
that IRF740 MOSFET is not running too hot.

Default: 200
Max: 400

Min: 100

9

HV Generator Frequency Lower.

 This controls the internal 

frequency of the HV generator. The higher the number, the lower 

the frequency of the HV generation. Normally you will not have to 
adjust this, but with some tubes, adjusting it can stop “flickering” in 

the filaments.

Before leaving the clock for long periods with a new setting, check 
that IRF740 MOSFET is not running too hot.

Default: 200
Max: 400

Min: 100

10

Scroll-back Speed Slower.

 Each short press will make the “scroll-

back” speed slower.

Default: 4
Max: 40

Min: 1

11

Scroll-back Speed Faster.

 Each short press will make the “scroll-

back” speed faster.

Default: 4

Max: 40
Min: 1

12

12 or 24 hour time.

 The hours are displayed in 12 or 24 hour 

mode.

“1” = 12 hour
“0” = 24 hour

13

Blank leading “0”.

 Blank out the leading “0” from single digit hours. “1” = blank

“0” = don't blank

Содержание Nixie Clock v6

Страница 1: ...th a normal PC Low power consumption Anti Cathode Poisoning ACP makes sure that the tubes will stay healthy for many years with no intervention from you All settings are stored in non volatile memory...

Страница 2: ...current internal temperature inside the clock case will be shown in degrees Celsius If this goes above 40 you should consider ventilating the case because the temperature compensation is not able to w...

Страница 3: ...Each short press will make the fade speed between digits faster Default 50 Max 200 Min 20 8 HV Generator Frequency Higher This controls the internal frequency of the HV generator The lower the number...

Страница 4: ...telling you that the clock is still running In order to display the time just press the button and the time will be displayed If you want to enable the display for the rest of the day do a long press...

Страница 5: ...ible from 7V 12V Higher voltages may be possible but could cause the digits to flicker is the voltage is too high The absolute maximum input voltage is 30V Any higher voltage than this will damage the...

Страница 6: ...nected to these sink terminals To connect up you take the positive sides of the LEDs to either VIN or VCC and connect the negative sides of the LEDs to these termionals BL RED PWM cathode connection f...

Страница 7: ...Schematic Below is the schematic for the clock...

Страница 8: ...And for the external components showing how they are connected The LDR and switch are connected to ground pin 1 The LEDs are driven preferably from VCC regulated 5V...

Страница 9: ...Construction Kit Contents When you unpack the kit you should find the following contents...

Страница 10: ...but have different jobs to do Be careful to get the 1N4001 and not the UF4004 D1 should be placed so that the white stripe on the body lines up with the white stripe on the board C9 must go the right...

Страница 11: ...int The resistor color code 2 7k The color code for the 2 7k resistor is RED 2 VIOLET 7 BLACK 0 BROWN 1 1 zero in this case Brown 1 1 Tolerance 2 7 0 0 with 1 tolerance Hint The 100 nF capacitor The c...

Страница 12: ...At the end of the low voltage circuit build your board should look like this Low Voltage Circuit...

Страница 13: ...28 Q1 IRF740 R9 390k R18 10k R10 4 7k The high voltage circuit uses the micro controller to drive the boost circuit with a high frequency square wave and has a feedback loop in which the controller re...

Страница 14: ...he voltage may be significantly higher than 170V at the moment because the high voltage generator is powerful and the output is not loaded Once you add a load by connecting the tubes the voltage shoul...

Страница 15: ...The 4 7 k resistor The color code for the 4 7k resistor is YELLOW 4 VIOLET 7 BLACK 0 BROWN 1 1 zero in this case Brown 1 1 Tolerance 4 7 0 0 with 1 tolerance Hint The 390 k resistor The color code for...

Страница 16: ...At the end of the high voltage circuit build your board should look like this High Voltage Circuit...

Страница 17: ...move the two unused pins see hint The LED must go with the right polarity The side has a flat on it and has the shorter lead see hint The LED should be wired up with the longer lead to pin 4 of the CO...

Страница 18: ...After you have wired everything up it should look like this Note that here I have put the RTC module directly onto the main board The battery goes in the RTC module with the back upwards...

Страница 19: ...ay round The dot denotes pin 1 and should be on the side closest to the micro controller All 6 should fit perfectly into the 24 pin socket The Opto Isolators are socketed because they are sensitive to...

Страница 20: ...After you have installed the Anode controls that part of the board should look this...

Страница 21: ...ch time the digit to be displayed the correct cathodes have to be set Notes Instead of the 74141 you might have the Russian equivalent K155 Be careful to orient the 74141 correctly Place the 16 pin so...

Страница 22: ...series with each LED cathode instead You can run between 4 and 6 LEDs off the driver depending on the type and the supply you can choose the regulated 5V or the unregulated VIN The total current for e...

Страница 23: ...he software to make the wiring and the PCB easy and logical We use a translation table in the software and cross some of the standard channels to make the PCB more logical You can also see this on the...

Страница 24: ...The wiring for the tubes is this...

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