Just when it seems we’ve seen all manner of awesomely hacked-together clocks, yet another one pops up that makes you think, “Hmm, I should build that.” This particular model is made out of three analog voltmeters, which fit nicely into an aluminum “stompbox” enclosure.
An Arduino Nano and RTC module are used for control and timekeeping. Since this board isn’t capable of outputting the original 1000VAC required to power these meters, the resistor, diode, and capacitor originally used with each one was hacked off and replaced with 2.2k resistors. This value was chosen via a process of trial and error to allow it to traverse the whole range of the meter with only the 5V output from the Nano. RGB LEDs were also added to each display for a bit of extra style.
The original faceplate was scanned into CorelDraw to use as a template, allowing creator ElegantAlchemist to produce a new “hrs,” “min,” and “sec” displays. As seen in the project’s Imgur set, the clock has a sweeping startup routine, along with a ticking motion when in action. It even appears that several copies of the device were made, with ‘Alchemist suggesting that having a few of these around the house would make your abode look like a submarine. Code is available here if you’d like to construct your own, or several!