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DanielleFong's profile
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@DanielleFong

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@DanielleFong

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Empire of the Future
Joined February 2008

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    Two-way (sending and receiving) short codes:

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    1. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      It’s both horrifying and fascinating. And there’s no way to learn except by shopping. Bugs = buying the wrong thing.

      3 replies 0 retweets 28 likes
      Show this thread
    2. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      I spent an hour this morning with calipers first figuring out, then buying... nuts and bolts. And there’s a chance I got it wrong.

      1 reply 0 retweets 20 likes
      Show this thread
    3. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      The polarity of build vs buy decision-making has flipped in the last 30 years. There’s really no such thing as pure building anymore. It’s all degrees of buying. A “from-scratch” design really means “from commodity COTS” — the baseline is not unrefined raw materials but China.

      1 reply 5 retweets 41 likes
      Show this thread
    4. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      I didn’t realize how utterly bad I was at this part till I tried doing non-trivial amounts of shopping in the last few months.

      2 replies 0 retweets 17 likes
      Show this thread
    5. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      Example: a typical early mechanical engineering class is called kinematics of machinery. It’s applied geometry. You work a lot of problems about how one thing will move if another moves. The things are connected by pins, sliders etc. In the textbook, the pin is just a point.

      2 replies 1 retweet 19 likes
      Show this thread
    6. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      In practice... buying a pin is a whole production. Took me hours of googling and Twitter questions to even shortlist the types of pins to choose from, and finding a cheap source of a sufficiently varied assortment box so I have room to experiment.

      2 replies 1 retweet 24 likes
      Show this thread
    7. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      And now my whole initial design is junk because I thought pin selection would be trivial. Now it is the driving constraint around which the rest of my design is developing.

      2 replies 1 retweet 21 likes
      Show this thread
    8. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      In fact I suspect “purchasing inertia” drives a lot of design. Selecting, characterizing, calibrating, and testing a catalog part is so much work that you will reuse that part in future designs until you’ve amortized the purchasing decision overhead.

      5 replies 2 retweets 41 likes
      Show this thread
    9. Venkatesh Rao (田 )‏ @vgr 15 Mar 2021

      I suspect, if you’re a part supplier, making it brain-dead easy to choose your part for a large, cheap, low-end application class buys you very loyal future customers for higher-end versions.

      8 replies 2 retweets 33 likes
      Show this thread
    10. 0.005 Seconds (49/300)‏ @seconds_0 15 Mar 2021
      Replying to @vgr

      McMaster Carr gets so much business because they make it stupid simple to shop for complex parts

      2 replies 0 retweets 5 likes
       🤷🏻‍♀️‏ @DanielleFong 15 Mar 2021
      Replying to @seconds_0 @vgr

      came here to say thispic.twitter.com/yRaHEn0Rri

      9:42 PM - 15 Mar 2021
      0 replies 0 retweets 0 likes

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