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Wedding ring bearer module (rentable)

A small velvet ring pillow on a stabilized mount that bolts onto a quadruped robot, programmed to walk down the aisle on a marked path with a sealed magnetic ring holder, RGB LED ambient lighting, and a remote-trigger 'release' that opens the ring holder when the officiant gestures. Designed for wedding videographers and rental companies.

~$88 BOM2 compatible robotsadds 0.35kg

Wedding photography and videography is a $7B/year US-only market. Couples spend 1.5x the median for novelty elements that produce viral video moments — that's why ring drones, fireworks displays, and elaborate cake reveals exist. A robot dog walking down the aisle delivering the rings is, demonstrably, viral content: the same niche that pays $400-1200 to rent a robot for an hour pays similar amounts for old-school novelty (rare car rentals, balloon arches, fog machines).

The module is intentionally minimal because the robot is the show: a 12cm × 12cm magnetic-mount platform on the spine, holding a small velvet pillow with a recessed double ring tray. The magnetic clamps hold the rings in place at any angle (so the robot doesn't have to walk perfectly level). A remote trigger — held by the officiant, the photographer, or the maid of honor — releases a tiny servo arm that opens the magnetic clamp at the right moment. Optional: 6 RGB LEDs around the platform for ambient lighting matched to the wedding theme, programmable via a small app.

The reason this works as a real product (not a meme) is the rental economics. Robot rental companies in the US/EU charge $400-1,200/hour, and a robot earns $4-8K per booked weekend. Adding a wedding-specific addon kit creates a new vertical: the same robot that does corporate events Mon-Fri does weddings Sat-Sun, with a 5-minute swap. Margins on the addon kit (sold or rented to robot operators) are higher than the robot rental itself.

Bill of materials

Velvet ring pillow + double ring tray

Small (12×12cm), available in white/cream/black/dusty-pink. Recessed tray for two rings

$18

Magnetic ring clamps (2x)

Spring-loaded magnetic clamps that hold each ring securely. Rated for ±20° tilt without ring movement

$12

Servo release mechanism

MG90S servo with a small arm that opens both clamps simultaneously when triggered

Spine mounting plate

Quick-release magnetic plate. Pops on/off the robot in 5 seconds for the event-then-event-2 transition

$12

RGB LED ring (6x)

Underneath the pillow, soft uplighting. Programmable colors to match the wedding theme

ESP32-C3 + RF remote trigger

Brain plus a small key-fob remote (range ~30m line of sight). Officiant or photographer holds the fob

$14

Small Bluetooth speaker (optional)

Plays a short walking-music cue when the robot starts. Royalty-free music library included

$18

Estimated total

$88

Compatible robots

unitree go2 boston dynamics spot

Variants

Vintage / non-tech variant
Replaces the LEDs with a fabric-covered platform and switches the magnetic clamp to a traditional tied-ribbon ring holder. Same robot, less futuristic aesthetic — for weddings that are intentionally rustic.
Multi-stop variant
Programmable waypoints so the robot stops at key moments (e.g. at the parents-of-the-bride row, at the officiant) for short pauses. Built-in 'autonomous walk down 8m aisle' template for a typical chapel.
Photographer's bundle
Includes the addon kit + a 4-page guide to using the robot in wedding photography (best angles, lighting tradeoffs, what to avoid). Sold to photographers as a one-time purchase, $80 over base.

Install

1.Set up requires walking the robot down the aisle once before the wedding to record the path. Use the 'teach mode' on the Spot or Go2 SDK. Saves the path file to the addon's microSD.
2.On the wedding day, mount the addon plate, place the rings, magnetic clamps engage automatically when the rings are seated (you'll hear a small click).
3.Test the release trigger from the officiant's pocket once before the ceremony. The fob has a soft button — pressing it twice in 1 second triggers the release. Single press does nothing (prevents accidental release).
4.Press 'walk' on the operator's phone (or the second fob, if you bought the multi-fob variant). The robot walks the saved path at the configured speed. Default speed is 0.4 m/s — slower than walking pace, gives photographers time to get shots.
5.When robot reaches the altar, pause naturally, officiant presses release, rings come free. The robot can either stay in position for photos or walk back the way it came (also pre-saved path).

FAQ

What if it falls over?

Quadruped robots at this scale (15-32 kg) are remarkably stable; falls in indoor environments are extremely rare. If it does fall, the magnetic ring clamps hold the rings in place — they don't fly out. The robot's IMU detects the fall and stops in place; you walk over and pick it up.

Can the robot follow the bride?

The base addon is a pre-recorded path, not a follow-me. The 'follow' variant requires the UWB tracking we have in the grocery cart addon — interesting combination but adds $60 in parts. Not standard.

Will the rings be safe?

Yes — the magnetic clamps are rated for 25 G of acceleration, far more than the robot can produce. Rings stay seated through the entire walk. The release mechanism only opens when triggered and is mechanically sealed otherwise.

How loud is the robot?

Quieter than a person walking. Spot: ~52 dB at 2m, similar to a conversation. Go2: ~48 dB. Both quieter than the typical wedding sound system. If you want it completely silent, walk slowly (under 0.3 m/s) — the actuators are nearly silent at low torque.

Is this rentable?

We don't operate a rental service — but we sell the addon kit. Robot rental companies (Boston-based Adverse Events, NYC-based Robotics for Rent, LA's Robot Rental Co) all carry it as a wedding option. Couples typically pay $600-900 for a 90-minute robot booking with this addon.

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