Long-lasting battery

Started by Piotr Wyderski in sci.electronics.design2 hours ago 8 replies

This website: http://www.tadiranbat.com/ boldly claims "THE ONLY LITHIUM BATTERIES PROVEN TO LAST 40 YEARS" But when I click on the XOL...

This website: http://www.tadiranbat.com/ boldly claims "THE ONLY LITHIUM BATTERIES PROVEN TO LAST 40 YEARS" But when I click on the XOL line link: http://www.tadiranbat.com/long-life-xol.html and open a random datasheet, the time axis universally ends at 1e5 hours, that is only 11 years. How did they come up with the claimed endurance? Best regards, Piotr


ketamine suppliers

Started by Dr tony Peter in sci.electronics.design4 hours ago

Buy liquid ketamine online, Liquid ketamine suppliers, Liquid ketamine, ketamine Liquid, Get liquid ketamine, Our website link:...

Buy liquid ketamine online, Liquid ketamine suppliers, Liquid ketamine, ketamine Liquid, Get liquid ketamine, Our website link: https://rotexvails.com/ Wickr us at.. Tonyfritz Our email..:contact@rotexvails.com Call Text & WhatsApp us at..:+1 (909) 683-1245 Good quality products. Good and affordable prices. Fast and Reliable delivery -Tracking Available! Various shipping


A better approach to desing may be teachable.

Started by Bill Sloman in sci.electronics.design5 hours ago

The latest Proceedings of the (US) National Academy of Sciences has a paper that is probably on-topic in a design group....

The latest Proceedings of the (US) National Academy of Sciences has a paper that is probably on-topic in a design group. https://www.pnas.org/content/pnas/early/2020/06/09/2002529117.full.pdf It reminded me that a lot of what I've gone through when I've been working out new design has been ripping up what initially looked like promising approaches and starting over. This isn't actually w...


OT: Most stupid comment from Trump ever

Started by Klaus Kragelund in sci.electronics.design6 hours ago 33 replies

https://twitter.com/i/status/1275361594571132928 What's his IQ anyway?

https://twitter.com/i/status/1275361594571132928 What's his IQ anyway?


OT: Why Covid-19 has a better recpetor-bonding domain than SARS did

Started by Bill Sloman in sci.electronics.design6 hours ago

The most recent Proceeding of the (US) National Academy of Sciences has an interesting - if highly technical - paper on the...

The most recent Proceeding of the (US) National Academy of Sciences has an interesting - if highly technical - paper on the subject. https://www.pnas.org/content/pnas/early/2020/06/04/2008209117.full.pdf It emphasises that the receptor-bonding domain in Covid-19 bonds some ten to fifteen times more strongly that in earlier SARS corona virus. It doesn't mention the fact - mentioned i


has google gone nuts?

Started by John Larkin in sci.electronics.design7 hours ago 33 replies

On the google.com page, there if a little menu box upper-right, that used to have a link to MAPS. Now clicking that box pulls up pages...

On the google.com page, there if a little menu box upper-right, that used to have a link to MAPS. Now clicking that box pulls up pages of blather about viruses and racial equity and google features. Does it do that for you too? I can't get google maps to work. Is it not public any more? -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lord ...


boasting

Started by david eather in sci.electronics.design7 hours ago 2 replies

wasn't there a kinda whitish guy who boasted that there wouldn't be 10 thousand new covid19 every day? How wrong does he have to be before the...

wasn't there a kinda whitish guy who boasted that there wouldn't be 10 thousand new covid19 every day? How wrong does he have to be before the barnacles can admit he was wrong?


Simulate RF interference coupling prior to testing

Started by mook Jonhon in sci.electronics.design7 hours ago 5 replies

I have a circuit that must operate next to a stong RF tranmitter (long rnage communication) Frequencies could be form MHz to Single...

I have a circuit that must operate next to a stong RF tranmitter (long rnage communication) Frequencies could be form MHz to Single GHZ range. what would be the best way to simulate a circuit in spice with a field farying RF fleid impenging on it. capacitove coupling? inductive coupling? other spice coupling method? The circuit dues have a single uH inductor connector to a diode ...


Numbers Don't Lie

Started by Ricketty C in sci.electronics.design9 hours ago 137 replies

There are many bogus numbers being pushed around regarding the death rate of this disease. I believe I've seen people citing 0.1% which is still...

There are many bogus numbers being pushed around regarding the death rate of this disease. I believe I've seen people citing 0.1% which is still a significant number in my book. This can be shown to be a bogus number by simply considering a few high infection rate states. New York state has had 31,046 deaths total which works out to 1,596 ppm or 0.16%. That is the death rate


discrete JFETs vs CMOS analog switch

Started by Adam Seychell in sci.electronics.design14 hours ago 24 replies

I need a switchable 0 /40dB attenuator for a 10Hz-20MHz 1Vp-p signal into a buffer amplifier (10k|3pF input loading). First I thought of using a...

I need a switchable 0 /40dB attenuator for a 10Hz-20MHz 1Vp-p signal into a buffer amplifier (10k|3pF input loading). First I thought of using a SPDT analog switch and resistor divider, but even 'low capacitance' devices come with 15~20pF capacitance on the common pin and have poor off isolation for my purpose. in --.--SW1--.--> to buffer | | 1kR | |--


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