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Joined 3 years ago
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Cake day: June 23rd, 2023

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  • Smart washing machine: ours is in the basement and my wife and I used to regularly forget we had laundry in it. I now have Home Assistant text us when a load is complete. But it only texts us if we are home and can do something about it. If nobody is home it waits until one of us gets home to text us.

    BUT: The washer and dryer are still dumb, pre-IoT generation. I built light sensors that are taped to the displays, and Home Assistant relies on those to determine if the appliances are on or off. No need for cloud-based monitoring, etc. A little creativity like that can work just as well or better than a convenient cloud-based solution.


  • I grew up boating up and down the New England coast. As long as there are big boats in the water there will be a need for good mechanics, and plenty of boat owners willing to throw money at you.

    I remember stopping at a marina for fuel once and we saw a mechanic replacing an outboard engine on one of those big “cigarette” boats that often have 3 or 4 engines on them. We struck up a conversation and learned that the boat owner was a rich idiot who didn’t know how to operate the boat properly and would blow an engine almost every time he took the boat out. It happened so often that the mechanic had started keeping a spare $20,000 engine in stock just for this boat. He was more than happy to take money from the idiot boat owner to keep the guy happy.





  • Speaking of slot machines, every slot machine, electronic poker machine, etc. are just state machines that operate based on a stream of random numbers fed into them by another device.

    The random number generators (RNG’s) used for gaming are highly regulated (at least here in the US) and only a small handful of companies make them. They have to be certified for use by organizations like The Nevada Gaming Control Board. RNGs have to be secured so only NGC officials and other key people can access them. If they are opened unexpectedly or otherwise tampered with then they need to go into lockdown and stop generating numbers until an official resets it.

    The RNGs also need to be able to replay sequences of numbers on demand. If the same sequence of numbers are fed into a game and the user plays the same way then the result of the game should be 100% identical each time.