A unique clock that combines retro aesthetics and modern technology has emerged, drawing inspiration from Soviet-era designs. Created by inventor Changliang Li, this clock employs homemade Nixie tubes alongside vintage cold-cathode tubes to display time in a visually striking manner.
The clock features MTX-90 cold-cathode thyratrons, which function similarly to neon tubes and are integral to its operation. These tubes are arranged in a loop counter that converts a standard 50 Hz mains frequency into seconds, minutes, and hours. Although the circuit design is not original to Li’s project, it is based on a concept that was once popular in electronics literature, credited to PA3FWM.
Crafting Nixie Tubes and Cold-Cathode Logic
The Nixie tubes used in this clock are newly manufactured by Sadudu of iNixie Labs. A detailed video showcases the tube-making process, which includes cutting glow elements with a fiber laser before encapsulating them using a lathe-based device.
Li’s innovative use of cold-cathode tubes relies on ambient light or background radiation for reliable operation, as the trigger electrode is not actively engaged in this setup. To enhance the switching performance of the thyratrons, Li incorporated a surplus smoke detector source to ensure sufficient ionization, allowing the clock to function seamlessly.
While the video hints that the MTX-90 tubes might have originally been seeded with radioisotopes, no concrete evidence supports this claim, which raises questions about the historical context of this technology.
Aesthetic Appeal and Functionality
The resulting clock is not only functional but also incredibly attractive, captivating viewers with its glowing display. The hypnotic effect of the Nixie tubes in action can be observed around the 3:37 mark in the video presentation.
For those interested in the intersection of vintage electronics and modern engineering, this project serves as a compelling example. It merges nostalgia with contemporary craftsmanship, breathing new life into technology from the past.
Li’s work exemplifies the creativity that often emerges when traditional methods meet modern innovations. If you have a project inspired by your own bright ideas, consider sharing it through available platforms to inspire others in the maker community.
