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Nixie Clock IN-17 Assembly Instructions And User's Manual

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IN-17 NIXIE TUBE CLOCK KIT
Assembly instruction and user manual
Bring to your home a piece of history with The Vintage Nixie Clock and its Cold War era
components. The clock will give a cosiness and a uniqueness for your house. To warm clock digits shine you want
to see permanently as to flame of fire.

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Summary of Contents for Nixie Clock IN-17

  • Page 1 Assembly instruction and user manual Bring to your home a piece of history with The Vintage Nixie Clock and its Cold War era components. The clock will give a cosiness and a uniqueness for your house. To warm clock digits shine you want...
  • Page 2 Introduction This parts kit intended for an electronics hobbyists that want to make a Nixie clock and do not want go deep to complicated clock control electronics and software. This instruction step-by-step assists you to assemble the clock. The kit consists all necessary electronics parts (excluding Nixie tubes and power adapter) and a microcontroller with pre-programmed an application software.

  • Page 3: Safety Precautions

    Safety precautions The clock printed circuit board (PCB) includes a High Voltage source that powers the Nixie tubes. It output voltage can reach 180 Volts DC. The voltage generated by this source can give a potentially LETHAL ELECTRIC SHOCK. When PCB is powered its contacts shall be not touched by hands or non- isolated tools (non-isolated tweezers for example).
  • Page 4 The clock kit does not include next components  A power adapter. Output voltage 12V DC, output current ~1A. Output end plug – 5.5 x 2.1mm, centre positive. It is cheaper to buy such power adapter in your local electronics shop because it will be equipped by necessary grid plug.
  • Page 5 Parts list Component designation Component description RESISTORS 470kΩ, 0.25W 1kΩ, 0.25W 3.3kΩ, 0.25W 0.51Ω, 0.5W R5, R6, R7, R8, R9, R10, R11, R15, R18, R19 10kΩ, 0.25W 220Ω, 0.25W R12, R14 330Ω, 0.25W R16, R17 680kΩ, 0.25W...
  • Page 6 1N4004 1N914 UF4004 D4-D9 LED, 3mm INTEGRATED CIRCUITS LM7805 MC34063 K155ID1 ATMEGA328P-PU DS3231 MISCELLANEOUS Nixie Clock PCB BAT_1 CR2032 Battery socket Battery 3V CR2032 DB1, DB2 Neon bulb FUSE 0.5A 330uH, 1A Inductor N1 - N6 IN-16 Nixie tube S1 - S3...
  • Page 7 NOTES:  Components actual view can differ due to different manufacturers.  If an inscription or color bar coding of the component is small, it is necessary to use the magnifying glass. Components review Resistors 1kΩ (R2) 10kΩ (R5, R6, R7, R8, R9, R10, R11, R15, R18, R19) 470kΩ...
  • Page 8 The first, second and third coloured bands on the resistors indicate the resistance using a colour code. This table indicates how to convert each colour to its numerical equivalent. Gold band means 5% tolerance. Band colour Numerical Band colour Numerical equivalent equivalent black...
  • Page 9 Transistors BC547, (Q3, Q5) BC557, (Q1) MPSA42, (Q4) IRF840, MOSFET, (Q2) EL817, (OK1-OK6)
  • Page 10 Diodes 1N4004 (D1) UF4004 (D3) 1N914 (D2) LED, 3mm (D4-D9)

  • Page 11: Integrated Circuits

    Integrated Circuits LM7805 (U1) MC34063 (U2) K155ИД1 (U3) ATMEGA328P-PU (U4) DS3231 (U5)
  • Page 12 Miscellaneous CR2032 Battery socket (BAT_1) Battery Neon bulb (DB1, DB2) Fuse 330uH, 1A Inductor (L1)
  • Page 13 Button (S1-S3) 16 pin socket 28 pin socket Power socket (5.5mm x 2.1mm) Speaker PCB Spacers 3mm screw...
  • Page 14 1N914 UF4004 LED, 3mm INTEGRATED CIRCUITS LM7805 MC34063 K155ID1 ATMEGA328P-PU DS3231 MISCELLANEOUS Nixie Clock PCB CR2032 Battery socket CR2032 Battery Neon bulb 330uH, 1A Inductor Buttons 16 pin socket 28 pin socket Power socket (5.5mm x 2.1mm) Speaker PCB spacers (10mm)
  • Page 15 PCB assembly sequence NOTES:  This instruction contents high definition pictures. If anywhere is uncertainty, PCB view can magnify and an interested component may to view in details  The side of the board that has printed component marking is the “component side”. This means that components must mount by inserting them down from the printed side.
  • Page 16 2.4.1. The small-value ceramic capacitor (C2) may be installed in either orientation, but the larger- value cylindrical capacitor (C7) must be installed with the proper polarity. The polarity is indicated on the PCB by a “+” sign near one end of the capacitor location. The polarity is indicated on the body of the capacitor with a stripe with a minus (-) sign located on the negative side of the capacitor.
  • Page 17 3. High voltage generator components preparation for insertion into the board and soldering order MC34063 BC557 IRF840 UF4004 1N914 Inductor 330uH 2.2uF, 250V C3, C5 0.1uF 2.2nF 0.5Ω 0.5W 1kΩ 3.3kΩ 220Ω 470kΩ 3.1. All resistors (except R4) leads bend in accordance with this picture that each resistor place on board surface will be minimal.
  • Page 19 3.5. Bend the resistor contact and solder into place R13. 4. Low and High Voltage sources operability test After Low and High Voltage sources components assembly it is necessary to check relevant source proper operability. 4.1. Select multi-meter DC 200 V measuring range. 4.2.
  • Page 20 4.4. Test low voltage (LV) source operability. Touch the black probe on the GND test point and the red probe on the 5V test point. The voltage should measure between 4.8 and 5.2 Volts. If not, disconnect power and check all relevant joints quality and polarity. Do not continue with the assembly until the error will be corrected.
  • Page 21 5. Microcontroller circuit components assembly Atmega328P-PU 10kΩ U4 Socket 28 pin socket 5.1. Take the resistor R11 and bend it, like pointed in item 3.1. Insert resistor into the board holes marked as R11 and solder it leads.
  • Page 22 6. Tube driver circuit components K155ИД1 OK1-OK6 EL817 330Ω U3 socket 16 pin socket 6.1. Take the resistor R12 and bend it, like pointed in item 3.1. Insert resistor into the board holes marked as R12 and solder it leads. 6.2.
  • Page 23 NOTE: An integrated circuit U5 DS3231 is in SMD (surface mount device) case, which is very difficult for soldering. Due to it soldered in advance. 7. RTC (real time clock) circuit components assembly DS3231 0.1uF R5, R6, R7 10kΩ BAT_1 CR2032 Battery socket Battery 3V CR2032...
  • Page 24 7.3. Battery has polarity (+/-) and requires special attention when mounting. Its socket BAT_1 solder as pointed on the picture. Insert the battery into the socket.
  • Page 25 8. Buttons circuit components assembly S1-S3 Buttons R8, R9, R10 10kΩ 8.1. Parts S1-S3 are right-angle tactile button switches. Insert them into locations S1, S2 and S3, and make sure that they sit flat on the board. Solder all four pins of each switch. 8.2.
  • Page 26 9. Speaker circuit components assembly BC547 10kΩ Speaker 9.1. Take the resistor R19 and bend it, like pointed in item 3.1. Insert resistor into the board holes marked as R19 and solder it leads. 9.2. Install the transistor Q5 legs into the board holes marked as Q5 that its case flat edge is above the flat edge of the placement marking.
  • Page 27 10. LED backlight circuit components 10kΩ 330Ω BC547 LED1-LED6 LED, 3mm There are two options for connecting LEDs. 1. Non-bending LED pins. This method is simpler, but the distance from the tube to the PCB will be greater. 2. Bend the LED contacts. This method is more complicated. In this case, the tube will be as close as possible to the PCB.
  • Page 28 The variant with bent LED contacts is described below. 10.1. Resistor R14, R18 leads bend in accordance with item 3.1. Insert them into location R14, R18 and solder it’s leads as pointed on the picture 10.2. Install the transistor Q3 legs into the board holes marked as Q3 that its case flat edge is above the flat edge of the placement marking.
  • Page 29 10.3. Bend the pins of the LEDs as shown in the photo. 10.4. Each LED (LED1 … LED6) must be mounted pointing vertically upwards for the bottom side of the board so that the long lead (the anode “+”) is inserted into the relevant hole marked (+). Be sure to mount LEDs properly because it is very difficult to de-solder them without damage if they mounted backward.
  • Page 30 10.5. Plug in the power supply, and then check or all of the LEDs light up. If not, check all relevant joints quality and polarity. Do not continue with the assembly until the error will be corrected. 10.6. Disconnect power supply.
  • Page 31 11. Neon dot circuit components DB1, DB2 Neon Bulb R16, R17 680kΩ 10kΩ MPSA42 11.1. Resistors R15, R16 and R17 leads bend in accordance with item 3.1. Insert them into locations R15, R16, R17 and solder their leads as pointed on the picture 11.2.
  • Page 32 12. Nixie tube mounting order Nixie tube mounting is most responsible work, because it is very difficult to de-solder its wires without PCB damage if they mounted incorrectly. You must follow our step-by-step assembly instructions. For clock six pcs IN-16 nixie tubes are necessary.
  • Page 33 12.1. For each tube cut wires until ~15-20 mm length. Remove a plastic holder. By using long nose pliers, smooth out an each tube wire. 12.3. One by one begin to install tubes into the PCB relevant placement holes. Lead marked by white bar is anode.
  • Page 34 12.4. Install all tubes on the same height. Level tubes that they stand straight. After inserting a tube leads into the board, solder its two opposite leads first. This will hold the tube in place. Look at it carefully to check it proper height and reciprocal arrangement. It is important that tubes will not inclined to the sides.
  • Page 35 12.5. To solder Neon bulbs DB1 and DB2 in place on the PCB. 12.6. Cut the excess leads short (as close as possible to the PC board). 12.7. Plug in the power DC 12V supply. If all components installed and soldered properly the clock shall begin to operate.

  • Page 36: Pcb Dimensions

    13. PCB dimensions PCB dimensions pointed on the drawing below. They will be necessary if you decide to make the case for clock. All dimensions pointed in millimetres. Highest electronics component height is equal 9 mm.
  • Page 37 14. Clock configuration and operation The three buttons of the clock have the following functions: Button 1 - Mode, Button 2 - Set, Button 3 - Adjust Clock Settings: 12 programmable modes:  Mode 1: Alarm settings (0 - disable; 1 - enable) ...