Arduino Nixie Clock v6 Скачать руководство пользователя страница 13 | Manualshive

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High Voltage Circuit:

Parts List:

C5

22pF

C6

22pF

C1

1uF

C7

100nF

C8

100nF

C4

100uF - 470uF

D2

UF4004

IC2

MEGA8-P

Q2

16MHz

L1

100uH

S24

SOCKET 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 reads the voltage produced via an analogue input,
and regulates the brightness of the tubes so that there is no flickering or unwanted dimming.

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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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