Should you’re discovering that you simply get caught together with your hand within the cookie jar a lot too usually (who doesn’t this time of yr?), then you definitely would possibly wish to try Milos Rasic’s newest mission. Anyone that desires a cookie from Rasic’s Sensible Cookie Jar goes to should work for it! The one method to carry the lid and get a candy deal with is to go for a run first. Personally, I’m nonetheless attempting to determine if that’s a good suggestion or merciless and weird punishment.
The Sensible Cookie Jar takes on an issue many people know all too effectively through the colder months: loads of snacks and fewer excuses to get outdoors. Rasic’s resolution is as intelligent as it’s ruthless. The jar seems to be completely extraordinary on the skin, however contained in the lid is a small locking mechanism that refuses to budge till its proprietor meets a predefined working objective.
An summary of the design (📷: Milos Rasic)
This isn’t Rasic’s first try at combining health and confectionery denial. He initially constructed an identical gadget greater than six years in the past, again earlier than he had entry to a 3D printer. That early model relied on hand-cut plywood, improvised metallic elements, and a a lot bulkier design. The brand new iteration is smaller, cleaner, and much more refined, because of fashionable microcontrollers and customized 3D-printed elements.
The system is centered round a compact mechanical lock pushed by a tiny SG90 servo motor. As a substitute of straightforward linear pistons, the redesigned lid makes use of small gears with swinging arms that stretch outward to carry the lid firmly in place. The entire electronics are neatly packed into the lid itself, together with an ESP32-S3 microcontroller for Wi-Fi connectivity, a chargeable battery, and a charger module.
On the software program aspect, the Sensible Cookie Jar depends on the Strava health platform to determine whether or not you’ve earned your snack. The ESP32 runs a small net server and it periodically polls the Strava API to test the consumer’s most up-to-date exercise. As soon as the recorded distance meets or exceeds the goal, the servo springs into motion and unlocks the lid. To preserve battery life and keep away from an annoying buzz, the code attaches the servo solely when it wants to maneuver.
Rasic has supplied loads of particulars should you’d wish to construct your individual Sensible Cookie Jar. However be warned: if you’d like what’s inside, you’d higher lace up your trainers first.
