A new clock design has emerged, blending nostalgia with modern technology. Innovator Changliang Li has crafted a unique “Soviet-Era Style Clock” that employs homemade Nixie tubes and Soviet-era cold-cathode tubes for its logic. This combination not only captivates with its aesthetic appeal but also showcases a fascinating engineering approach.
The clock prominently features Nixie tubes for time display. The core component driving its functionality is the MTX-90 cold-cathode thyratron. These thyratrons operate similarly to neon tubes, but they incorporate an additional trigger electrode, which is not utilized in this specific project. The neon tubes are configured in a loop counter that converts the 50 Hz mains frequency into seconds, minutes, and hours. While the circuit design is not original to Li’s project, it is based on a blueprint attributed to PA3FWM, which has been commonly referenced in electronics literature.
Li utilized new Nixie tubes manufactured by Sadudu of iNixie labs. The production process of these tubes is intriguing, involving the use of a fiber laser for cutting out the glow elements, which are later encapsulated using a lathe-like device. This meticulous crafting contributes to the clock’s distinctive visual appeal.
Technical Details and Functionality
The cold-cathode tubes function reliably due to their reliance on ambient light or background radiation for activation, given that the trigger electrode is left floating. To enhance the reliability of the switching mechanism in the thyratrons, Li incorporates a surplus smoke detector source, which facilitates sufficient ionization. Although the project video suggests that the MTX-90 may have originally been seeded with radioisotopes, there is currently no evidence to substantiate this claim.
The final product is not only functional but also mesmerizing in its operation. Viewers can observe the clock in action at around the 3:37 mark of the accompanying video. The hypnotic glow of the Nixie tubes and the intricate design of the clock create an inviting atmosphere.
The project exemplifies a blend of vintage technology and contemporary innovation. For those interested in the application of neon lamps and the functionalities of the Soviet MTX-90, a more in-depth exploration was previously featured. Changliang Li continues to inspire creativity in electronics, inviting others to share their innovative projects.
This captivating clock serves as a reminder of the enduring appeal of retro technology in the modern world, showcasing both the artistry and engineering prowess of its creator.
