The DRM Chair has only a limited number of use before it self-destructs. The number of use was set to 8, so everyone could sit down and enjoy a single time the chair.
A small sensor detects when someone sits and decrements a counter. Every time someone sits up, the chair knocks a number of time to signal how many uses are left. When reaching zero, the self-destruct system is turned on and the structural joints of the chair are melted.
We had this model from IKEA awhile back.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — The Essential Guide to Electronics in Shenzhen
Wearables — Lithium Batteries: a soft touch goes a long way
Electronics — Capacitor Polarity Markers
Biohacking — Can Gizmos Cure Insomnia? – The New Yorker
No comments yet.
Sorry, the comment form is closed at this time.