Spawning this from @Justin thread about Unicorns pooping .Net watches.
What would people do with a round LCD that was “excess” to requirements that might help get us to the 3000 MOQ?
I thought it’d make a great stop-light demo. You basically need 3x of them, one you fill with red, one you fill with orange/yellow, one fill with green. ( 
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DIY Nest anyone?
https://www.walmart.com/ip/Google-Nest-Learning-Thermostat-3rd-Generation-Stainless-Steel/46667636
A bike computer dashboard
resurrect Colin’s bike computer? Great idea!
Fancy humidor thermometer/hygrometer with adjustable faces to make it match the box. Pop in BLE and make a mobile app to go with it. Different faces as in-app purchases. Basically, a fancier competitor to the Boveda Butler.
A well water level (or storage tank) indicator for those of us on wells…
car - parking distance sensor
(still old car around with no distance sensors to park car on urban areas)