The trickiest bit here had to be taking a hand-drawn sketch and getting it to engrave cleanly onto clear acrylic. The maker's daughter drew the suspension bridge where the couple got engaged, traced over it with a marker, and the drawing was then digitized into an SVG with Adobe Capture. From there the design went into Adobe Illustrator, where the large numbers were added around it. Checking the engraving settings on the first acrylic piece before committing to the rest seems like the smart way to handle that risk.
The construction side is well thought through. The base was modeled in Shapr3D on an iPad Pro and prepped in Cura, and the printed parts include a slot for the acrylic plus internal compartments for the electronics. Aqua Net hairspray on the glass bed helped adhesion, and several bases and lids were printed at once, then sanded and finished with gold spray paint. The Fabool laser cutter engraved the designs and cut the rectangular panels from Glowforge Proofgrade medium clear acrylic.
The wiring was done in batches: wire cut, stripped and soldered to LEDs, switches and battery holders, with heat shrink over the joints. Each circuit uses two LEDs, a battery holder, a toggle switch and Wago connectors, which were glued in with 5-minute epoxy while the LEDs were secured with hot glue. Switch holes were drilled before the wiring went in, and the first finished base was tested by toggling it on and off.
One trade-off stands out: the tolerances were tight enough that some panels needed a gentle tap with a small mallet to seat properly. It is also a little unclear how many were made in total, since the image shows six numbers while ten completed units were lined up and switched on. The maker has shared the STL file, and mentioned the same design could work as a nightlight or glowing sign.
Project by Makers Workshop. Watch it on their YouTube channel: