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A Lixie clock recreates the layered glow of a Nixie display with 5-volt, individually addressable LEDs and laser-etched acrylic—not gas-filled tubes or high-voltage drivers. The original IEEE Spectrum project used four Lixie displays, an Arduino Nano, a USB-powered circuit, and a custom red-oak base. It remains a compelling maker project, but its 2018 prices, parts, software, and availability should not be treated as current build instructions.
For a new project, prototype one display first, confirm that its library and wiring match the hardware generation, then choose an Arduino Nano for a local clock, an ESP8266 or ESP32 for network time, or an RTC-equipped design for dependable offline operation.
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What is a Lixie?
A real Nixie tube is a glass cold-cathode gas-discharge device. Selecting one of its wire electrodes causes the gas around that electrode to glow. The tube therefore needs a suitable high-voltage supply, current limiting, and a driver circuit.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallA Lixie is an LED-and-acrylic display designed to imitate that appearance. It is best described as Nixie-style or Nixie-inspired, not as a functional or electrical replacement for a Nixie tube. It avoids the high-voltage section, scarce tubes, and fragile glass envelopes of a conventional Nixie clock, while adding RGB color control and programmable animations.
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- Small & Compact Plug-in Alarm Clock for Every Room: Perfect for modern homes ditching cable boxes—place it under your living room TV to replace the lost clock display, or use it as a sleek bedside alarm in the bedroom. Also ideal for home offices, gyms, or dorm desks.
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- Sleek, User-Friendly Design:Designed with simplicity in mind: a single top button controls brightness, while the clean, modern look complements any decor—from minimalist living rooms to industrial-style home gyms. Its intuitive interface works for all ages.
How the layered glow works
- A WS2812B-style RGB LED injects light into the edge or base of the display.
- The light travels through clear acrylic, largely remaining inside because of total internal reflection.
- Laser-etched regions scatter that light toward the viewer.
- Ten acrylic planes, each etched with a different numeral, are stacked together.
- Lighting one plane makes one numeral visible; reflections from the unlit planes create depth and the floating, tube-like effect.
The result is an optical illusion rather than a glowing wire electrode. It generally looks most convincing from the intended viewing angle and can appear less uniform from the side.
The original IEEE Spectrum build
The January 2018 article describes a four-digit clock assembled from four ready-made Lixie displays. Each display was reported at US$38 at the time, a historical figure rather than a current price. The controller was an Arduino Nano, and the author made a custom base from approximately 6-millimeter (1⁄4-inch) red oak.
The setup was powered over USB, with the display current limited to 400 mA for that particular four-digit configuration. That value is not a universal USB limit or a guarantee for every Lixie revision. Brightness, LED behavior, wiring, and the number of displays all affect the actual load. The author selected a warm color intended to resemble an amber Nixie tube.
The article is valuable as a design reference, but it does not supply a complete reproducible build: there is no full wiring diagram, complete bill of materials, exact base drawing, verified current measurement for every condition, or complete current software guide.
Original Lixie or Lixie II?
Lixie II is a successor product, not simply a new name for the original display. Reported changes include a redesigned housing, easier mounting, eight screws in the base, a modular construction intended to produce more glow, and an eleventh customizable pane.
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- 【Large LED Display】The 11" corded wall clock features full-screen time display and large bright numbers, easy to read. Here are all the features that you might expect for a digital wall clock: Time, Date, Week, Temp or Humidity. ATTENTION: Must be plugged in to work. Not battery operated.
- 【Auto Dimming】You can manually adjust the brightness by 10-levels. The digital wall clock has an auto dimming function; When turned on, the brightness will auto decrease at night, not to disturb your sleep.
- 【Time & Calendar Alternation】The digital wall clock's time and calendar can be set to alternating display mode.
- 【Memory Function】The wall clock also has a time memory function, no need to reset after power outage (2*AAA batteries need to be installed in advance).
- 【Remote Control & DST】All the settings and operations of the big wall clock do not need to be removed, but can be easily done with the remote control(2*AAA batteries need to be installed). You can easily change DST time in March and November using the remote.
The Tindie listing observed for this article showed a price of $33.99 per digit kit and an “On a Break” availability message. Check the product page before designing around it; the price and availability can change, and the kit may not include your controller, power supply, enclosure, or timekeeping hardware. A powered base kit was listed at $20 on the Lixie Labs store page.
Do not mix the original Lixie’s mechanical instructions, photographs, library calls, or expected kit contents with Lixie II documentation. If the display generation is uncertain, identify the hardware first and use the library and examples supplied for that version.
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- Four original Lixie displays or four compatible Lixie II digit kits.
- An Arduino Nano-class board for a local clock, or an ESP8266/ESP32 for Wi-Fi time.
- A properly rated regulated 5-volt power supply.
- Data, power, and ground wiring suited to the total current and cable length.
- A bulk capacitor near the display power input; the original project lists a 1000-μF capacitor.
- An optional real-time clock module for accurate offline timekeeping.
- An enclosure or base that supports the display bodies without clamping the acrylic.
- Appropriate soldering, woodworking, laser-cutting, or 3D-printing tools for the chosen enclosure.
Use the official Arduino hardware catalog when selecting a controller. The exact board matters less than matching its voltage, pins, library support, and timekeeping method to the display.
Wire one display before building the clock
The original Lixie project describes a four-wire-style interface consisting of 5 V, ground, data in, and a serial data output for chaining. A typical arrangement is:
5 V power supply ──────> 5 V on every display
Power ground ──────> GND on every display
Arduino data pin ──────> DIN on first display
First DOUT ──────> DIN on second display
Second DOUT ──────> DIN on third display
Third DOUT ──────> DIN on fourth displayCheck the markings on the actual hardware: data must enter DIN, not DOUT. Connect controller and display grounds together. For multiple bright displays, distribute 5-volt power robustly rather than relying on thin jumper wires or routing all current through one small connector. Measure the completed circuit instead of assuming the original 400-mA setting applies.
Rank #3
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- Plug in Alarm Clock with Battery Backup: This simple alarm clock designed with a battery backup function, which 4AAA batteries can keep all the setting and the alarm works well during the power outage, taking no risk of missing any important schedule. Besides, it's useful and distinctive to check the time by pressing top button, which will illuminate display for 20 seconds during power outages. Important: Adapter (included) is needed to keep the clock working. Batteries are for memory backup only
- Dimmable Alarm Clock with 6 Dimmers: As a modern alarm clock for bedrooms, this brightness clock has 5 adjustable dimmer levels+OFF to satisfy different needs for brightness. The level of brightness does not distract you from sleeping, ensuring that you can clearly see the time cross the room and easily check the time at night with its large number. More importantly, this electronic clock can protect your eyesight from harm with adjustable dimmer
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- Minimalist Aesthetics Alarm Clock for Room Decor and Gifts: This newly designed simple digital alarm clock retains the advantages of a digital alarm clock: easy to set, accurate time keeping, long life, and most importantly a small size (only 5 inch display). Its minimalist design not only serves as a travel alarm clock, tabletop clock, but also decorates the room. No matter what the holiday, it is a suitable choice as a gift to everyone
An ESP8266 or ESP32 outputs 3.3-volt logic. Whether that reliably drives a particular 5-volt WS2812B-compatible input depends on the display revision, supply voltage, wiring, and signal margin. A level shifter may be required. Reports of successful direct connection are not a universal compatibility guarantee.
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Prototype the electronics
- Connect only one display, 5 V, ground, and data.
- Install the library associated with the exact original-Lixie or Lixie-II hardware.
- Select the correct board and port in the Arduino IDE.
- Run a digit-cycling or supplied example and confirm all ten numerals illuminate.
- Set a conservative brightness or current limit before adding displays.
- Add displays one at a time, connecting each preceding DOUT to the next DIN.
- Test every position independently before enclosing the electronics.
The original project identifies Connor Nishijima’s library and shows a constructor pattern such as lix(DATA_PIN, NUM_LIXIES);. Treat that as an example, not a promise that every current release uses the same API. The Lixie II library listing records version 1.3.1, released November 25, 2019, but that date does not establish active maintenance or current compatibility. Download the exact repository version and examples associated with your display.
Give the display an accurate time source
The Lixie hardware displays digits; it does not keep accurate time. The original Nano project used its controller’s millis() counter and reported that one ceramic-resonator-based Nano ran approximately 0.3 percent fast. That is about 26 seconds per day, and it can vary with temperature. The observation applies to that board and environment, not to every Nano.
Arduino Nano
A Nano is a good choice for a simple demonstration or manually set clock. It is familiar and many Nano versions use 5-volt logic, but a software-only clock will drift. Use an RTC if the clock should remain useful after power cycles.
RTC module
An RTC provides a better offline source. Read hours and minutes, format them as four digits, and update the display once per minute or second. Provide for backup-power condition and periodic calibration rather than assuming every inexpensive RTC is perfectly accurate.
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- USB Charging Port: Convenient USB port allows you to charge your smartphone or other electric device without plug in wall. handy, convenient and organized.
- Easy Operation Clock: Intuitive setting button, experience zero stress when setting the time or alarm. Easy for kids, seniors and the elderly.
- Outlet Powered with Memorized Battery Backup : Plug in to power the clock with the included DC adapter . 2 x AAA batteries (not included) needed for storing time and alarm settings in case of power outage. With backup battery power source only, the screen will go blank and alarm will not sound.
ESP8266 or ESP32
A Wi-Fi controller can obtain time through NTP, the approach noted in the original article. It is convenient for automatic correction, but the firmware must handle startup, lost Wi-Fi, invalid time, time zones, and daylight-saving changes. ESP32 offers more capacity, while ESP8266 is closer to the platform cited by the original project. Both require checking 3.3-volt logic compatibility.
Raspberry Pi or other Linux board
A Linux single-board computer is useful when the display will also show network data, dashboards, or scripted content. It brings greater software overhead and is less appliance-like than a microcontroller.
A robust connected clock can synchronize over Wi-Fi and retain time with an RTC fallback. Do not show a plausible but invalid time while the system is waiting for its first synchronization; use a startup animation or recognizable error pattern instead.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Build a stable base
The woodworking is the main custom-fabrication challenge. The original author found the concealed openings and cutouts more difficult than the programming. Since the original article does not provide enough information to reproduce its base precisely, make the enclosure from the dimensions of the displays you actually receive.
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- Measure each display body, acrylic-stack thickness, mounting point, and cable exit.
- Make a full-size cardboard or paper template with the proposed digit spacing.
- Check the viewing angle and ensure the openings hide the display edges without touching the acrylic.
- Leave clearance around each stack so assembly does not force or twist the panes.
- Reserve a rear cavity or removable rear panel for the controller, power entry, and data chain.
- Add strain relief so the cable cannot pull on a display.
- Use a recessed opening, guard, or transparent cover to reduce accidental knocks.
For the original look, approximately 6-mm red oak was used. Alternatives include a laser-cut acrylic frame, 3D-printed brackets, aluminum extrusion, or a simple printed enclosure. Build the mock-up before cutting the final material.
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- Digital Clock Alarm Clock for Bedrooms: Peakeep gathers all features you rely on a clock for your bedroom, such as precise and clearly visible numbers, a loud alarm with snooze and volume control, adjustable display brightness, 1 USB charger, and even a backup battery alarm in case of power outages
- Large Numbers Digital Clock: 2-inch height of large digits can be seen from a greater distance, providing a clear and easy way to keep track of time. Big numbers make it easier for seniors and elderly with poor eyesight or those who struggle to read small fonts or simply prefer a larger display to read the time
- Loud Alarm Clock with Volume Control: 5 settings of volume control for the alarm enable the clock to be super loud for heavy sleepers or those who have trouble waking up. It also allows you to set the alarm to a lower volume to help protect your hearing while still waking you up. 9-min snooze can be helpful if you like to catch a few extra minutes of sleep in the morning
- Digital Clock with Adjustable Brightness: 5 different brightness settings ensure clock time is always visible in various lighting conditions. You can customize the brightness to your preference to get eye comfort and improve sleep by adjusting the display to a lower brightness level or completely off at night
- Electric Alarm Clock with Battery Backup: With a powerful AC/DC adapter included, this digital LED clock is able to run smoothly and accurately. Additionally, the clock requires 2 AAA batteries (not provided) to memorize your settings and trigger the alarm, this way, in the event of power outage, you won't oversleep or worry about resetting the time
Troubleshooting
No display output
- Measure 5 V at the display under load.
- Confirm a common ground.
- Check that data enters DIN and that the sketch uses the intended pin.
- Verify the library matches the display generation.
- Confirm the configured display count.
- Check whether the supply voltage collapses when the LEDs illuminate.
The first digit works but later digits do not
Inspect the DOUT-to-DIN links, then test each display alone. Add displays one at a time. Suspect power drop, a damaged unit, an incorrect count, or signal degradation from long data wires.
An ESP8266 or ESP32 is intermittent
Investigate 3.3-to-5-volt signal compatibility and try an appropriate level shifter. Also check the board definition, library, supply noise during Wi-Fi transmission, and whether network startup is blocking display updates.
The clock drifts
Changing display code cannot correct an unstable time base. Replace millis()-only timing with an RTC or NTP, and define behavior when NTP is unavailable or the RTC backup supply is exhausted.
Acrylic is broken or misaligned
Do not disassemble a display unless the manufacturer’s instructions for that hardware explicitly require it. Avoid overtightening, provide assembly tolerance, and protect the stack in a case. User reports about fragility are anecdotal rather than a controlled reliability study.
Is a Lixie clock worth building?
Choose Lixies when the goal is a distinctive display and a hands-on electronics or enclosure project. They offer the Nixie aesthetic without the high-voltage circuitry of a conventional tube clock, and they are easier to animate and recolor.
Choose real Nixies when authentic tube physics, vintage construction, and the exact glow behavior matter more than low-voltage simplicity. Choose generic edge-lit acrylic when fabrication flexibility and potentially lower cost outweigh the time required to design the optical stack, LED mounting, alignment, and software. Choose an OLED or segmented LED clock when readability, low cost, and dependable timekeeping are the priorities.
The biggest practical uncertainties in 2026 are sourcing the defining display hardware and confirming current software support. If Lixie II is available and its documentation matches the kit, it is the most direct route for a new build. If not, an existing original-Lixie project may be worth preserving, while a scratch-built edge-lit display is the fallback for makers who can fabricate the acrylic and mechanical parts themselves.
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