More evidence that China is lying BIG TIME about the extent of COVID deaths

Started by Flyguy in sci.electronics.design2 hours ago 74 replies

The Chicomm lovers of the world (i.e. Sloman) will have to come to grip with the fact that China is totally lying about what is happening in the...

The Chicomm lovers of the world (i.e. Sloman) will have to come to grip with the fact that China is totally lying about what is happening in the country. I reported earlier that there has been an unprecedented number of cell phone disconnects in China (21 million). Now, funeral homes in Wuhan have markedly increased their orders of urns: https://www.newsweek.com/wuhan-covid-19-death


Favourite parts with off-label uses?

Started by Anonymous in sci.electronics.design5 hours ago 5 replies

Following up on blocher's sterling work,(*) Many of us use parts off-label, often very successfully. A few examples: SAV-551+ pHEMTs make...

Following up on blocher's sterling work,(*) Many of us use parts off-label, often very successfully. A few examples: SAV-551+ pHEMTs make very good wideband bootstraps. Their f_max is around 12 GHz, but they're amazingly stable. 74HC4352s make good flying-capacitor diff amp front ends. TMUX1511s make very nice analogue lock-ins--their Coff*Ron FOM is almost in a class with relays, but...


Approach to Finding the Root Cause of Failures

Started by Anonymous in sci.electronics.design6 hours ago 91 replies

Another topic that I hope can elicit engineering discussion: What makes up a good skill set for finding the root cause of a failure that is...

Another topic that I hope can elicit engineering discussion: What makes up a good skill set for finding the root cause of a failure that is rare, intermittent or obscure? Over the past several years I have been more involved in root cause failure than I was when I was doing more design work. In many ways I think it is more challenging than design work. It takes a mindset that is


two switcher circuits

Started by Anonymous in sci.electronics.design6 hours ago 25 replies

...

https://www.dropbox.com/s/keynlhs9ktzivyh/LTM8078_dual_neg_1.asc?dl=0 https://www.dropbox.com/s/htzvrbnd8qx3ooi/LTM8078_plus_minus_1.asc?dl=0 -- John Larkin Highland Technology, Inc Science teaches us to doubt. Claude Bernard


mSATA PCIe connector

Started by Winfield Hill in sci.electronics.design7 hours ago 28 replies

I'm thinking of using a standard mSATA / PCIe card-edge connector in a miniature pocket-sized project. Its small 30mm width, with...

I'm thinking of using a standard mSATA / PCIe card-edge connector in a miniature pocket-sized project. Its small 30mm width, with 52-contacts at 0.8mm, is good. The typical 50 max-uses spec is a bit troubling, but we may not need more uses than that. Inserted PCBs swing down into place. Its low price and reliability reputation are good. Does anybody have some advice to offer? ...


Surveillance of Wastewater Could Reveal True Scale of Coronavirus Outbreak Present and Future

Started by Anonymous in sci.electronics.design8 hours ago 6 replies

Wastewater monitoring has been used for decades to assess the success of vaccination campaigns against poliovirus, says Charles Gerba, an...

Wastewater monitoring has been used for decades to assess the success of vaccination campaigns against poliovirus, says Charles Gerba, an environmental microbiologist at The University of Arizona in Tucson. The approach could also be used to measure the effectiveness of interventions such as social distancing, says Gerba, who has found traces of SARS-CoV-2 in raw sewage in Tucson.


When is the Covid war over?

Started by Harry D in sci.electronics.design8 hours ago 174 replies

Engineers want to know what is the end deliverable or how do I know when the task is done. I believe the most important parameter is deaths per...

Engineers want to know what is the end deliverable or how do I know when the task is done. I believe the most important parameter is deaths per day to determine when it is back to work time. The D/D curve is bell-shaped and we are on the leading edge with about 150 D/D. If we can get down to 10 D/D, for three contiguous days, I believe we have passed the criteria. What is your over


varicaps?

Started by John Larkin in sci.electronics.design11 hours ago 109 replies

They seem to be getting obsolete. Maybe I can cheat and use a regular pn diode. -- John Larkin Highland Technology,...

They seem to be getting obsolete. Maybe I can cheat and use a regular pn diode. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com


500A power source

Started by Winfield Hill in sci.electronics.design12 hours ago 40 replies

In my search for a 8 to 10V, 500A source, needed for 2 seconds, I've been looking at LiFePO4, and LTO (Lithium Titanate) cells, in 38120...

In my search for a 8 to 10V, 500A source, needed for 2 seconds, I've been looking at LiFePO4, and LTO (Lithium Titanate) cells, in 38120 and 66160 sizes. All types of suppliers, plus completed battery systems, with charge balancing electronics. Sheesh, it's enough to make one's head spin. BTW, a simple "12V" battery has a bit too much voltage, an extra burden on power MOSFET(s)...


OT: March 2020 hydroxychloroquine study

Started by bitrex in sci.electronics.design12 hours ago 18 replies

No significant effect vs. control group:

No significant effect vs. control group:


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