Texas power prices briefly soar to $9,000/MWh as heat wave bakes state

Started by Anonymous in sci.electronics.design2 hours ago 89 replies

Unbelievable 75GW peak demand due to heat wave, almost nothing in reserve. And this is just the warm-up, it's going to get much...

Unbelievable 75GW peak demand due to heat wave, almost nothing in reserve. And this is just the warm-up, it's going to get much worse. https://www.bloomberg.com/news/articles/2019-08-12/searing-texas-heat-pushes-power-prices-to-nea r-record-levels


The Truth About Faster Internet: It's Not Worth It

Started by Winfield Hill in sci.electronics.design2 hours ago 28 replies

https://tech.slashdot.org/story/19/08/20/1450204/the-truth-about-faster-internet-its-not-worth-i t -- Thanks, - Win

https://tech.slashdot.org/story/19/08/20/1450204/the-truth-about-faster-internet-its-not-worth-i t -- Thanks, - Win


Walmart suing Tesla for Solar panel fires

Started by John S in sci.electronics.design2 hours ago 4 replies

Dave Jones: https://www.youtube.com/watch?v=WzpXyNNZg38

Dave Jones: https://www.youtube.com/watch?v=WzpXyNNZg38


OT: Epstein: 'Conspiracy theorists' proved right again

Started by Cursitor Doom in sci.electronics.design2 hours ago 208 replies

He had too much dirt on too many top people. https://www.zerohedge.com/news/2019-08-10/jeffrey-epstein-dead-apparent- suicide -- This...

He had too much dirt on too many top people. https://www.zerohedge.com/news/2019-08-10/jeffrey-epstein-dead-apparent- suicide -- This message may be freely reproduced without limit or charge only via the Usenet protocol. Reproduction in whole or part through other protocols, whether for profit or not, is conditional upon a charge of GBP10.00 per reproduction. Publication in this...


Sources of digitized/scanned old data books?

Started by Anonymous in sci.electronics.design2 hours ago 10 replies

I have in my basement/lab a fairly large collection of analog and digital data books from circa 1979-2000. It is quite a collection from mfg that...

I have in my basement/lab a fairly large collection of analog and digital data books from circa 1979-2000. It is quite a collection from mfg that include TI, AMD, AMI, National, Signetics, Fairchild, Intel, BB, Linear, Mot, etc. Also have A number of cross ref to gen purpose devices, ECG, SK, NTE etc. My collection also contains compendium of app notes from the above. Are there


Nuclear battery

Started by Piotr Wyderski in sci.electronics.design2 hours ago 56 replies

Not terribly innovative on its own, but given the DIY aspect and price, it can be a viable "eternal" auxiliary power supply for some hi-rel...

Not terribly innovative on its own, but given the DIY aspect and price, it can be a viable "eternal" auxiliary power supply for some hi-rel devices: https://www.youtube.com/watch?v=KKdzhPiOqqg The tritium pipes are available on Aliexpress for 10-20 dollars a piece. Best regards, Piotr


How to design an Interesting inductor

Started by amdx in sci.electronics.design3 hours ago 38 replies

I'd like to have a Variable 100uh inductor, that is controlled to full saturation with dc through the 100uh coil. I see some two winding...

I'd like to have a Variable 100uh inductor, that is controlled to full saturation with dc through the 100uh coil. I see some two winding coils, but the dc control winding has huge inductance. Working range 500kHz to 4MHz. Is this possible? Thanks for your thoughts, Mikek


48V to 2000V DC-DC smallest design

Started by mook Jonhon in sci.electronics.design4 hours ago 18 replies

Its been a while but once again looking at a HV pulser type application. It will charge up about 10nF to 2kV with about 1mA. Then keep it...

Its been a while but once again looking at a HV pulser type application. It will charge up about 10nF to 2kV with about 1mA. Then keep it toped off as that cap discharges into another capacitive much smaller capacitive load. The 10nF will loose 100V or so then need to be recharged witn 1mA before the next burst. It need to be a custom approach due to environment constraints. Cost is ...


OT: Tax-free holiday starts today.

Started by Winfield Hill in sci.electronics.design7 hours ago 9 replies

A tax-free holiday weekend starts today, in Massachusetts (our sales tax is 6.25%). But my wife and I can't think of anything to...

A tax-free holiday weekend starts today, in Massachusetts (our sales tax is 6.25%). But my wife and I can't think of anything to buy! -- Thanks, - Win


interesting inductor

Started by Anonymous in sci.electronics.design19 hours ago 57 replies

https://www.digikey.com/products/en?keywords=RN%20242-6-02-1M8 That is technically a commmon-mode choke - which makes it cheap - but is...

https://www.digikey.com/products/en?keywords=RN%20242-6-02-1M8 That is technically a commmon-mode choke - which makes it cheap - but is probably useful for a real-inductor need that we have now. It's spec'd at 1.8 mH per winding, but my AADE meter says about 2.5. I should measure it some other ways to be sure. (K seems to be over 0.99, so it would be a good common-mode filter but no...


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