Why your household needs a knight
Every shared kitchen has the same unsolved problem: a full bin, an open lid, and three people who each thought someone else was taking it out. The Garbage Guardian is a stick-on sensor inside the bin lid that settles it. It sleeps until motion wakes it, checks the fill level and the lid, and if things are not in order it sounds the trumpet, escalating from a polite reminder to full medieval panic, until the bin is actually empty.
The guardian's duties
When the bin is full
Sounds the trumpet until the bin is emptied, escalating with the remaining space: calm at 10 cm, full panic at 1 cm. It stops when the sensor measures an empty bin, not before.
The lid is left open
After a minute, the knight speaks up until the lid is closed. Close it and all is forgiven, instantly.
Honor good behaviour
When the bin is emptied and the lid is closed, the guardian rewards you with perfect silence. Deep sleep, no beeps, no blinking lights. Just honor.
Specifications
Laser fill sensing
Time-of-flight laser measures how full the bin is, to the millimeter, even in the dark.
Lid angle from gravity
6-axis motion sensor, no magnets, no moving parts. Works on any bin.
A knightly brain
Nordic nRF52840, ARM Cortex-M4.
Escalating trumpet
Piezo alarm, from polite beep to full medieval panic.
Months on 2× AA
Sleeps at a few µA, woken by motion.
Zero calibration
Mount it, switch it on with the lid closed, done.
Config in your browser
Optional Bluetooth wizard at /configure-web. Works fine without.
Tool-free mounting
Adhesive strip or magnets, inside any bin lid.
Pocket-size
Approx. 70 × 40 × 25 mm (final enclosure in development).
€0 running costs
No subscription, no cloud fees. Just fresh AAs a couple of times a year.
Our sacred promise
- Yours forever (pay once, never a subscription)
- Works the moment you switch it on (no app to install)
- Everything stays in your kitchen (no wifi, no cloud, no dashboard)
- Nothing to sign up for ("a trash bin should not have an account")
- Loyal to the mission (the trash goes out, always)
Get yours
The first batch of 100 units is in preparation. Sign up and you'll get the early-bird price of €49 (instead of €59) when ordering opens. No payment now, no obligation, just first in line.
One email when ordering opens. Nothing else. Unsubscribing is honored, unlike your bin duty.