My notes don’t include what triggered the thought, but I think it was something in one of the Lee Smolin books I read recently. My recent post, Analog Computing, brought the idea to mind again, because analog computers often use op amps. I was reminded yet again while reading about SPADs.
I’m talking about the very useful rules of thumb (heuristics) I learned to help understand, even design, electronic circuitry. They’re shortcuts in the sense of being only approximately true, but their simplified view can make a circuit much easier to understand.
I thought I’d pass them on for those interested in electronic design.
Well, it’s been quite a week! As mentioned in the last post, the coming of fall (which is always bittersweet for me), a bout of miserably muggy weather, and then electrical problems in my home, have all conspired to batter the shores of my equilibrium. But there have been some raisins in the poo pile. This week, stressful though it was, has turned out a good one.
For one, my Minnesota Twins won the AL Central Division last Wednesday! They are going to postseason for the first time since 2010. (The bad news is that it looks like they’ll face the Yankees — who ended the Twins’ postseason in 2003, 2004, 2009, 2010 and 2017.)
And my electrical power problems are fixed. (I think.)
Enjoying a nice morning!
I’ve definitely been feeling the wear and tear of my age lately. This past few weeks, especially, a variety of things has conspired to do considerable pounding on my emotional balance. Simply put, it’s been a shitty transition into fall with the looming dark and cold of winter (the Autumnal Equinox was this past Monday).
And since I have an electrician coming tomorrow to try to solve the power outages that have affected half the circuits in my home, it ain’t over yet. On the other hand, counting blessings, the weather is finally fall-like (we had a bout of hot muggy misery last week); I’ve been really enjoying my morning walks; and I read one of the most delightful and brilliant science fiction books.
I’ll tell you about the book this coming Sci-Fi Saturday. Today I thought I’d show you why I love my morning walks!
One of those annoying-to-those-who-know-better shortcuts that movies and TV shows sometimes take is the visual trope of throwing a piece of wood (or a rock) at an “electrified fence” and producing an exciting shower of sparks. Typically, one character is just about to touch the fence, only to be pulled back just in time by another character who throws something at the fence to show the first character how they almost bought it.
It looks good — everyone loves a good sparking. In fact, you may have noticed how many action scenes take place in factories that seem mainly to manufacture sparks and steam. You may have noticed how often welders seem to be creating showers of sparks in the background of every action movie.
But this isn’t about our love of sparks.