Error correction in short packet.

Started by Clive Arthur in sci.electronics.design1 hour ago 63 replies

Hi all I have serial data in 14 byte packets on which I'd like to detect and correct errors. Two bit errors would be nice. I can put 2...

Hi all I have serial data in 14 byte packets on which I'd like to detect and correct errors. Two bit errors would be nice. I can put 2 extra EDC bytes on the end to make a 16 byte packet. I don't have the resources for Reed-Solomon. I could use a 16 bit CRC, these are easy to generate with a small/moderate LUT. In the past, I've used a CRC16 for single bit error detection and c...


WTF is Russia Thinking?

Started by Ricky in sci.electronics.design2 hours ago 116 replies

I suppose I should ask what is Putin thinking, really. I read Russia has moved missiles close to Finland's border... nuclear capable missiles! ...

I suppose I should ask what is Putin thinking, really. I read Russia has moved missiles close to Finland's border... nuclear capable missiles! Is that supposed to make Finland more comfortable about not joining NATO? Finland may not have a choice. Turkey is making noises about vetoing their application. But that may just be posturing to gain some concessions. Working the system... I'm...


OT. Jif Recall

Started by Dean Hoffman in sci.electronics.design2 hours ago 3 replies

From the Lexington, KY plant.

From the Lexington, KY plant.


Tesla is fast

Started by RichD in sci.electronics.design3 hours ago 310 replies

Today the electric cars are the quickest on the road. The classic petrol muscle cars are vying for the silver medal. Was it obvious to the...

Today the electric cars are the quickest on the road. The classic petrol muscle cars are vying for the silver medal. Was it obvious to the designers, from day one, that this would be the case? Is it simply a power/weight calculation? I'm congenitally leery of simple explanations - -- Rich


Crystal oven theory

Started by bitrex in sci.electronics.design3 hours ago 14 replies

Here's a paper on the theory of crystal ovens: There's a lot more to it than just slapping a crystal & heater in a metal box and...

Here's a paper on the theory of crystal ovens: There's a lot more to it than just slapping a crystal & heater in a metal box and calling it a day! There are probably some pathologically bad geometries even a really fast control loop can never stabilize very well. The part about the outer can acting like a Faraday shield is interesting, shunting


(PDF) Oxford Textbook of Advanced Heart Failure and Cardiac Transplantation by Michael Domanski

Started by Med Care in sci.electronics.design4 hours ago

This is the PDF eBook version for Oxford Textbook of Advanced Heart Failure and Cardiac Transplantation by Michael...

This is the PDF eBook version for Oxford Textbook of Advanced Heart Failure and Cardiac Transplantation by Michael Domanski https://booksca.ca/library/pdf-oxford-textbook-of-advanced-heart-failure-and-cardiac-transplanta tion-by-michael-domanski/


Any Tesla driver here?

Started by Jeroen Belleman in sci.electronics.design5 hours ago 41 replies

Any Tesla drivers here? I heard of this silly incident where someone forced the hatch shut by hand rather than pushing the button, and by doing...

Any Tesla drivers here? I heard of this silly incident where someone forced the hatch shut by hand rather than pushing the button, and by doing so immobilized the car. Apparently, when you do that, it believes the hatch is still open and refuses to move. Don't you love modern cars? Comments? Jeroen --the driver should always have the final word-- Belleman


OT: Mutual blocking = Kinder gentler Internet

Started by John Doe in sci.electronics.design5 hours ago 25 replies

Elon Musk taking over Twitter will be just another brand of censorship. BTW... About a week ago, for some strange reason YouTube went ballistic...

Elon Musk taking over Twitter will be just another brand of censorship. BTW... About a week ago, for some strange reason YouTube went ballistic with shadow banning. Apparently they are trying to cut down on replies to original posts (similar to what Amazon did with product reviews), in the most unusual way. As long as there are censors, there will be corruption. Letting people decide ...


OT: Russia-Trump collusion hoax judge rules against Hillary attorney-client privilege

Started by John Doe in sci.electronics.design6 hours ago 45 replies

https://nypost.com/2022/05/12/judge-orders-steele-dossier-firm-fusion-gps-to-give-john-durham-em ails/ "Special counsel John Durham scored a...

https://nypost.com/2022/05/12/judge-orders-steele-dossier-firm-fusion-gps-to-give-john-durham-em ails/ "Special counsel John Durham scored a victory Thursday when a federal judge ordered the research firm behind the infamous "Steele dossier" to turn over nearly two dozen emails tied to its work with Hillary Clinton campaign lawyer Michael Sussmann." John Durham's team asked the judge to p


BJT behaviour at ridiculously low current levels

Started by Piotr Wyderski in sci.electronics.design11 hours ago 38 replies

Hi, I am experimenting with ultra-low power ideas and I was able to simulate a 30Hz relaxation oscillator running at 45nA/1V. I am waiting...

Hi, I am experimenting with ultra-low power ideas and I was able to simulate a 30Hz relaxation oscillator running at 45nA/1V. I am waiting for the delivery of high-value resistors, but the same oscillator with resistors scaled down 10x works on the bench and consumes ~380nA/3V/360Hz which is still pretty awesome. This real device has been made of BSS123/BSS84 operating in the subth...


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