# nixieclock.biz

> Handmade Nixie tube and Numitron retro clock kits by TSM Ltd, shipped from Switzerland. Factory assembled or DIY build kits with optional WiFi NTP time sync, open source Arduino firmware, and easy tube replacement. 4-digit and 6-digit models available.

## Store

- [All Clock Kits](https://www.nixieclock.biz/Store.html): Full product listing — Nixie and Numitron clock kits
- [MNC6 6-Digit Nixie Clock](https://www.nixieclock.biz/StoreMNC6.html): Factory assembled 6-digit medium tube Nixie clock (IN-14, IN-16, Z570M and others)
- [MNC6 V2](https://www.nixieclock.biz/StoreMNC6V2.html): Updated MNC6 with integrated WiFi NTP sync
- [SNC4 IN-2 Nixie Clock](https://www.nixieclock.biz/StoreSNC4IN2.html): 4-digit Nixie clock kit using IN-2 tubes
- [SNC4 IN-17 Nixie Clock](https://www.nixieclock.biz/StoreSNC4IN17.html): 4-digit Nixie clock kit using IN-17 tubes
- [SNC4/6 Small Tube Clock](https://www.nixieclock.biz/StoreSNC46.html): 4/6-digit small tube Nixie clock (IN-12, IN-2, IN-17)
- [Classic Rev5](https://www.nixieclock.biz/StoreClassicRev5.html): 6-digit Arduino Nixie clock kit with ESP8266 WiFi
- [Classic Rev6](https://www.nixieclock.biz/StoreClassicRev6.html): 6-digit Arduino Nixie clock with NeoPixels and PIR support
- [Modular Nixie Clock](https://www.nixieclock.biz/StoreModular.html): 6-digit modular clock with pluggable tube holders (IN-14)
- [All-In-One Clock](https://www.nixieclock.biz/StoreAllInOne.html): Self-contained 6-digit Arduino Nixie clock for IN-14, IN-8-2, Z570M
- [Arduino All-In-One](https://www.nixieclock.biz/StoreArduinoAllInOne.html): Arduino-powered DIY All-In-One 6-digit Nixie clock
- [4-Digit Wemos Clock](https://www.nixieclock.biz/Store4DigitWemos.html): WiFi Nixie clock for IN-12 or IN-2 tubes with 3D printable case
- [Single Decatron Clock](https://www.nixieclock.biz/StoreSingleDecatronClock.html): Animated single Decatron clock for A-101 or OG-4 tubes
- [6-Digit Numitron Clock](https://www.nixieclock.biz/StoreNumitron-6Digit.html): WiFi-enabled 6-digit Numitron clock (DA-2000, IV-13, IV-9)
- [4-Digit Numitron Clock](https://www.nixieclock.biz/StoreNumitron-4Digit.html): WiFi-enabled 4-digit Numitron clock (DA-2000, IV-13, IV-9)
- [Add-Ons & Upgrades](https://www.nixieclock.biz/StoreAddOns.html): WiFi time provider module to upgrade battery-backed RTC clocks

## Guides

Hands-on answers to common Nixie/Numitron questions, written and attributed to Ian Sparkes (founder, TSM Ltd), who designs and hand-builds the kits. Each guide leads with a direct answer and links to the relevant product pages.

- [Guides Index](https://www.nixieclock.biz/guides/index.html): Full list of guides
- [How Long Do Nixie Tubes Actually Last?](https://www.nixieclock.biz/guides/how-long-do-nixie-tubes-last.html): Real lifespan figures, cathode poisoning, storage ageing, and how to tell a dying tube from a dying driver board
- [IN-14, Z570M, or IN-8-2: Which Tube Should I Choose?](https://www.nixieclock.biz/guides/in14-vs-z570m-vs-in8-2-which-tube.html): Glow character, digit font, size, and availability trade-offs between the three medium-tube families used in the MNC6 line
- [Is Nixie Tube Voltage Dangerous?](https://www.nixieclock.biz/guides/is-nixie-tube-voltage-dangerous.html): What the internal ~170-180V tube supply means for safety, in a finished clock versus during DIY kit assembly
- [Kit or Fully Assembled — Which Should I Buy?](https://www.nixieclock.biz/guides/kit-or-assembled-which-should-i-buy.html): Same electronics either way — what changes is who solders it, the price, and HV exposure during build
- [Nixie or Numitron — Which Should I Buy?](https://www.nixieclock.biz/guides/nixie-vs-numitron-which-should-i-buy.html): Neon glow discharge vs incandescent filament digits — glow character, voltage, and mechanical simplicity trade-offs
- [Classic vs Modular vs MNC6 — Which Clock Range?](https://www.nixieclock.biz/guides/classic-vs-modular-vs-mnc6-which-clock.html): What separates the ranges by tube family, form factor, and price point
- [How Hard Is It to Solder a Nixie Clock Kit?](https://www.nixieclock.biz/guides/how-hard-is-it-to-solder-a-nixie-clock-kit.html): Required skill level, common first-timer mistakes, and a sensible build order
- [What Tools Do I Need to Build a Nixie Clock Kit?](https://www.nixieclock.biz/guides/tools-needed-to-build-a-nixie-clock-kit.html): The core tool list for a through-hole kit build, including why a 200V-rated multimeter matters
- [Nixie Clock Won't Power On? Troubleshooting](https://www.nixieclock.biz/guides/nixie-clock-wont-power-on-troubleshooting.html): Step-by-step triage for a dead board or a single dark digit
- [Does a Nixie Clock Need WiFi to Keep Accurate Time?](https://www.nixieclock.biz/guides/does-a-nixie-clock-need-wifi-to-keep-time.html): NTP-synced WiFi models vs onboard RTC timekeeping and expected drift
- [Nixie Clock WiFi Setup Without an App](https://www.nixieclock.biz/guides/nixie-clock-wifi-setup-without-app.html): What WiFi is used for and the ongoing network dependency after initial setup
- [Can I Leave My Nixie Clock On 24/7?](https://www.nixieclock.biz/guides/can-i-leave-my-nixie-clock-on-247.html): Continuous-use tube life and cathode poisoning prevention on static digits
- [How to Clean a Nixie Tube and Clock Case](https://www.nixieclock.biz/guides/how-to-clean-a-nixie-tube-and-clock-case.html): Safe cleaning methods for tube glass and different case materials
- [Where Do You Ship From & How Long Does Delivery Take?](https://www.nixieclock.biz/guides/where-do-you-ship-from-how-long-does-delivery-take.html): Hand-built and tested in Switzerland — what affects transit time and customs

## Support & Documentation

- [Manuals & Downloads](https://www.nixieclock.biz/Manuals.html): User manuals, construction guides, firmware, and 3D print files for all models
- [Support](https://www.nixieclock.biz/Support.html): Get help with assembly, firmware, and configuration
- [Contact](https://www.nixieclock.biz/Contact.html): Email nixie@protonmail.com

## About

TSM Ltd makes open source retro clock kits using vintage Nixie tubes, Numitron tubes, and Decatron tubes, paired with modern ESP8266/Arduino controllers. Kits ship from Switzerland and include options for WiFi NTP time synchronisation and browser-based configuration. Source code is available on Bitbucket.