bang-bang control loop

Started by Anonymous in sci.electronics.design4 hours ago 18 replies

https://www.cnbc.com/2022/01/25/the-federal-reserve-is-likely-to-signal-a-march-rate-hike.html We've seen this pattern for hundreds of years,...

https://www.cnbc.com/2022/01/25/the-federal-reserve-is-likely-to-signal-a-march-rate-hike.html We've seen this pattern for hundreds of years, but nobody adds much damping or lead comp to the loop. Quite the contrary. -- I yam what I yam - Popeye


Bargain LTSpice/Lab laptop

Started by bitrex in sci.electronics.design4 hours ago 23 replies

Last of the Japanese/German-made business-class machines; several years old now but AFAIK they're well-built and not a PITA to work on,...

Last of the Japanese/German-made business-class machines; several years old now but AFAIK they're well-built and not a PITA to work on, and even a refurb should be good for a few more years of service...


Driving Too Slow

Started by Ed Lee in sci.electronics.design5 hours ago 164 replies

For Maximum EV Efficiency, Stick to 25 Miles an Hour, Ignore Angry Drivers and...

For Maximum EV Efficiency, Stick to 25 Miles an Hour, Ignore Angry Drivers and POLICE. https://www.wsj.com/articles/ev-electric-car-battery-charge-hypermiler-11642517385 I was driving around 40 MPH on right lane of a highway (speed limit unknown) and got pull over for driving too slow. I told him that i was running low on charges and won't make it to the charger any faster. He escort me fo...


"Hollow" screw

Started by Don Y in sci.electronics.design5 hours ago 28 replies

I need a screw (a bit over 1/4" thread diameter) with a hole drilled longitudinally throughout its length. The hole as large as feasible...

I need a screw (a bit over 1/4" thread diameter) with a hole drilled longitudinally throughout its length. The hole as large as feasible without significantly reducing the strength to unusable (nebulous term) levels. I realize I will eventually have to contract a casting or machined parts. But, am looking for onesy-twosy quantities to demo a prototype. I thought I could approximate i...


Companies that went bankrupt over bad decisions

Started by Fred Bloggs in sci.electronics.design8 hours ago 8 replies

Xerox was poised to take over the world, and they blew it.

Xerox was poised to take over the world, and they blew it.


Covid Omicron Pattern

Started by Rick C in sci.electronics.design8 hours ago 14 replies

There does seem to be a pattern of the omicron variant of covid rising in infection rates very rapidly, then peaking and falling off. The drop...

There does seem to be a pattern of the omicron variant of covid rising in infection rates very rapidly, then peaking and falling off. The drop does not seem to be as rapid and several countries have seen it drop some and plateau. I'm surprised by this as I don't think it can be explained by changes in behavior. I spend time in Virginia and Puerto Rico where the infection is following rough...


Make your system 1000x faster !

Started by skybuck2000 in sci.electronics.design12 hours ago

Two valuable super short videos for you in dutch how to make your system 1000x faster it's in dutch but good luck ! it may crash some apps...

Two valuable super short videos for you in dutch how to make your system 1000x faster it's in dutch but good luck ! it may crash some apps sometimes though, but the time gained is worth the reload when they do crash and it might also save your solid state disk from dieing ! Twee mooie videos for jullie. Video 1: Firefox sneller maken in 34 seconde: https://www.youtube.com/watch?v


Looking for a decade counter -or- divider ?

Started by Sid 03 in sci.electronics.design13 hours ago 19 replies

Decade counter: I am looking for a decade counter, I found some on-line like the 4017 and 74HC[T]390. But I am now sure any of those are what...

Decade counter: I am looking for a decade counter, I found some on-line like the 4017 and 74HC[T]390. But I am now sure any of those are what I want. At my previous job we use to have quad decade counters in one chip available. That has been a few years ago and not sure where to look now. What I want to be able to do is tie at least two of them end to end and get a divider of 10 and 100. M...


TDR solder mask

Started by John Larkin in sci.electronics.design15 hours ago 5 replies

https://www.dropbox.com/s/idwz568o8hfpgzb/TDR_Solder_Mask.jpg?raw=1 The two un-masked patches are not visible on 30 ps TDR. Board variations...

https://www.dropbox.com/s/idwz568o8hfpgzb/TDR_Solder_Mask.jpg?raw=1 The two un-masked patches are not visible on 30 ps TDR. Board variations are a lot bigger. -- If a man will begin with certainties, he shall end with doubts, but if he will be content to begin with doubts he shall end in certainties. Francis Bacon


This 22-year-old builds chips in his parents\u2019 garage

Started by Jan Panteltje in sci.electronics.design15 hours ago 20 replies

This 22-year-old builds chips in his parents\u2019 garage ...

This 22-year-old builds chips in his parents\u2019 garage https://arstechnica.com/information-technology/2022/01/this-22-year-old-builds-chips-in-his-par ents-garage/ more than 1000 transistors on it...


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