OT: Dumbest Judicial Ruling, EVER...

Started by Jim Thompson in sci.electronics.design18 minutes ago 44 replies

OT: Dumbest Judicial Ruling, EVER... I bet no leftist can discern the grotesque fallacy. ...

OT: Dumbest Judicial Ruling, EVER... I bet no leftist can discern the grotesque fallacy. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | ST


A useful instrument to have

Started by Jan Panteltje in sci.electronics.design19 minutes ago 25 replies

Talk about value for money: http://www.ebay.com/itm/332278660359 Have been having fun with this, bought it to measure temperature of some...

Talk about value for money: http://www.ebay.com/itm/332278660359 Have been having fun with this, bought it to measure temperature of some electronics hanging under my drone while it was hanging in the air, from a safe distance... But it turns out to be very precise and useful for measuring all sorts of stuff, transformers, raspberries, PC exhaust air, what not. It is not as narrow re...


Current Sources

Started by Chris in sci.electronics.basics32 minutes ago 62 replies

Hi Finding it real tough trying to visualise a current source. I have no probs with voltage sources which seem very logical, but for some...

Hi Finding it real tough trying to visualise a current source. I have no probs with voltage sources which seem very logical, but for some reason I can't get my head around current sources. How should I try to see them? Any guidance would be much appreciated; thanks.


Solutions to 'The Art of Electronics' exercises

Started by Daniel Mandic in sci.electronics.design41 minutes ago 32 replies

Is there any chance to get the solutions for the many exercises, found through Chapter 1-15 of that brilliant electronics teaching book? --...

Is there any chance to get the solutions for the many exercises, found through Chapter 1-15 of that brilliant electronics teaching book? -- Daniel Mandic


Most efficient way to get 1.5 volts from 3.7 volts or less?

Started by Anonymous in sci.electronics.basics2 hours ago 12 replies

I have a digital height gauge that eats batteries. Not a cheap Chinese made one, but a fairly high quality Japanese made one. It uses one SR44...

I have a digital height gauge that eats batteries. Not a cheap Chinese made one, but a fairly high quality Japanese made one. It uses one SR44 battery. For some reason it has started using batteries much faster than it used to. I have tried several different brands of batteries from several different sources and they all seem to last about the same. Because of the bulk of the sliding portion ...


Computer Assisted Fornication

Started by Anonymous in sci.electronics.design4 hours ago 64 replies

The thought of using a computer to fornicate may seem ridiculous, but consider this. Gasoline engines used to be able to function by...

The thought of using a computer to fornicate may seem ridiculous, but consider this. Gasoline engines used to be able to function by simple carburation and "ignition points" and coil to ignite the fuel. Now a days, this requires computers and very complicated circuits that work fine, until something fails, and then it will require thousands of dollars of scanners and testers to check and dete...


exploding wirewound resistors

Started by John Larkin in sci.electronics.design4 hours ago 69 replies

Lots of people make parts like this: https://www.digikey.com/product-detail/en/bourns-inc/PWR5322WR250JE/PWR5322WR250JETR-ND/2022962 The...

Lots of people make parts like this: https://www.digikey.com/product-detail/en/bourns-inc/PWR5322WR250JE/PWR5322WR250JETR-ND/2022962 The overload specs are almost always 5x rated power for 5 seconds, so a 3 watt part can absorb 15 joules in that time. I wonder what happens for shorter time overloads? Constant joules? Has anyone experimented with stressing this sort of small wirewoun...


(OT) How did those old gas station bells work?

Started by Anonymous in sci.electronics.design4 hours ago 20 replies

Back in the 60s, when I was a kid, I remember that most gas stations had a rubber hose (about the same size as an air compressor hose), that...

Back in the 60s, when I was a kid, I remember that most gas stations had a rubber hose (about the same size as an air compressor hose), that laid across the driveway, by the gas pumps. When a car pulled up to the pump, and drove over that hose, a bell would ring inside the station. This was back when the station attendant would come outside and fill your tank. Also when many stations were ...


MOSFET WTF

Started by Tim Williams in sci.electronics.design4 hours ago 17 replies

VDMOS nonlinear capacitance is modeled in terms of Vgd. Too bad a real MOSFET doesn't show a steplike change in Ciss as Vgd changes sign. ...

VDMOS nonlinear capacitance is modeled in terms of Vgd. Too bad a real MOSFET doesn't show a steplike change in Ciss as Vgd changes sign. (This is easily demonstrated with the gate charge test circuit, watching the waveform at low Vdd. The cutoff slope depends only on Vds, not Vgd.) So many decades of bullshit to sift through... Tim -- Seven Transistor Labs, LLC Electrical E...


Improved Diode Recovery Model

Started by Tim Williams in sci.electronics.design4 hours ago 1 reply

https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxyc3RldmVzY290dHxneDo1NjQ1Z TI1ZTY2MWFiM2Yz This had been discussed some...

https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxyc3RldmVzY290dHxneDo1NjQ1Z TI1ZTY2MWFiM2Yz This had been discussed some time ago. There was a lot of bragging about being able to create a model, but nothing came of it. Fortunately, this guy had beaten us to the punch, and released this paper publically. The design with multiple time constants makes me think of appro


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