TL;DR
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A hobbyist has developed a new version of a voltmeter clock, featuring a cleaner design and smooth, continuous movement of the hands. The project uses inexpensive panel meters and a custom microcontroller circuit.
A hobbyist has unveiled a redesigned voltmeter clock that features a more aesthetically pleasing appearance and smooth, continuous motion of the time indicators, using inexpensive components and custom electronics.
The project builds on an earlier version from 2019, with significant improvements in design and execution. The clock uses three generic 90° panel voltmeters, disassembled and customized with printed decals for displaying hours, minutes, and seconds. The new design incorporates a recessed front panel to hide unattractive flanges, achieved through CNC machining and bending techniques for the side walls.
The circuit employs an AVR128DB28 microcontroller, which controls the meters via digital output pins through high-frequency pulse trains. This method leverages the inductance of the meters to produce a smooth, continuous motion of the hands, rather than stepwise movement. The system is powered off a standard wall wart and features simple pushbuttons for setting the time. The code for controlling the display is concise and publicly available.
Why It Matters
This project demonstrates a practical, low-cost approach to creating a visually appealing clock that combines analog and digital techniques. It highlights how hobbyists can produce custom, functional electronics with minimal components, emphasizing craftsmanship and ingenuity. The continuous motion feature enhances the aesthetic appeal, making it a unique addition to home or office decor.
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Background
Voltimeter clocks have been a niche DIY project since at least 2019, when the original creator built a basic version. The recent update reflects ongoing interest in refining such designs for better aesthetics and functionality. The project leverages common electronics components and accessible fabrication methods, making it feasible for hobbyists to replicate or adapt.
“Most of the designs I see are needlessly complicated and not all that pretty, so I decided to build a revised version that’s cleaner and smoother.”
— the project creator
“The continuous motion is achieved through a high-frequency pulse train, leveraging the meter’s inductance to produce smooth movement.”
— the creator
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What Remains Unclear
It is not yet clear how durable or precise the clock will be over long periods, or how easily others can replicate the design without detailed instructions. The project remains a hobbyist endeavor with limited testing on longevity and accuracy.
microcontroller controlled clock
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What’s Next
The creator may publish detailed build instructions and code, encouraging others to experiment or improve upon the design. Future updates could include enhanced enclosure designs, more precise timing mechanisms, or integration with digital systems.
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Key Questions
How does the clock achieve smooth, continuous movement?
The clock uses a high-frequency pulse train to control the meters, exploiting their inductance to produce intermediate positions, resulting in seamless motion.
What components are used in this project?
Three generic 90° panel voltmeters, an AVR128DB28 microcontroller, a wall wart power supply, and small pushbuttons for setting the time.
Can I build this clock myself?
Yes, the project uses accessible components and fabrication methods, but some familiarity with electronics and woodworking is recommended. Detailed instructions and code are expected to be shared by the creator.
What are the main advantages of this design?
It offers a visually appealing, smooth-moving clock at low cost, with a simple control interface and a handcrafted aesthetic.
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