IN-18 Nixie Tube Clock KIT

IN-18 Nixie Tube Clock Kit

Build your own six-tube Nixie clock with this DIY electronics kit for IN-18 tubes. The kit includes electronic components and a pre-programmed microcontroller, with detailed instructions to guide you through assembly.

Nixie tubes and a power adapter are not included.

What’s included

• Electronic components required to assemble the clock, excluding Nixie tubes and the power adapter
• A microcontroller with pre-programmed clock software

What you need separately

• Six IN-18 Nixie tubes. We recommend unused New Old Stock (NOS) tubes.
• A 12V DC power adapter, approximately 1A, with a 5.5 × 2.1 mm centre-positive plug.

Assembly instructions

Follow the IN-18 Nixie clock assembly instructions (PDF) for step-by-step guidance.

For a pre-assembled option, see our assembled IN-18 Nixie clock controller. Nixie tubes and a power adapter are also required separately.

Clock and display features

• Hours, minutes and seconds display
• 12-hour or 24-hour operation
• Programmable leading-zero blanking
• Date display in DD/MM/YY or MM/DD/YY format
• Automatic date display
• Alarm function
• Simple time setting with three buttons
• Standard, crossfade and scrollback display modes
• “Slot Machine” routine to help prevent cathode poisoning
• Programmable RGB LED tube backlighting
• Automatic value increment for faster time setting
• Neon colon indicators blinking at 1 Hz
• High-frequency dynamic tube drive designed for long service life
• Settings stored in non-volatile memory
• Factory reset

Technical specifications

• Tube type: IN-18
• Input voltage: 12V DC
• Dimensions: 262 × 56 mm
• Power consumption: 3 W
• Timekeeping: DS3231 real-time clock with temperature compensation and CR2032 battery backup; accuracy of ±1 second per month
• Mains frequency: independent of AC frequency, for use in any country with a suitable power adapter