[Murphy's_Lawyer] had some empty space on the wall in his kitchen, so he decided to fill it with a whirring Steampunk gizmo: an Arduino-driven steam gauge.
The build began as an old 10″ Ashcroft pressure gauge sourced from eBay, which [Murphy's_Lawyer] dissected to determine the state of its guts. Finding the gauge’s Bourdon tube intact, he got to work constructing a method of generating motion without the need for actual steam. The solution was to mount a continuous rotation servo between the tube and the case. The servo lacked the strength to flex the tube on its own, so [Murphy's_Lawyer] fashioned a simple lever out of brass to help it along.
The electronics consist of an Arduino Uno and an accompanying homemade PCB. The code for the Uno generates random motion for twirling the servo, and three LEDs built into the face reflect values generated for speed, pause and run time. The final upgrade came in the form of a new dial face, which provides some updated text as well as a cutout square that lets you see the previously obscured gears in action. Check out the video below, then see another Steampunk overhaul: the Edwardian Laptop.