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OT: Opinions about this situation?

Started by Jim Thompson in sci.electronics.design26 minutes ago 12 replies

OT: Opinions about this situation?... An alternate question... at what frequencies are these "devices" controlled ?> :-} ...

OT: Opinions about this situation?... An alternate question... at what frequencies are these "devices" controlled ?> :-} ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete


Got these from my backyard

Started by DecadentLinuxUserNumeroUno in sci.electronics.design40 minutes ago 123 replies

biggest blackberries I have ever seen... I love Virginia! http://s27.postimg.org/oy6l6ig37/bigberries.jpg

biggest blackberries I have ever seen... I love Virginia! http://s27.postimg.org/oy6l6ig37/bigberries.jpg


Soldering to Ni/Au pads

Started by Phil Hobbs in sci.electronics.design41 minutes ago 10 replies

So I have this bunch of very small InGaAs photodiodes (60-micron diameter) that are wire bonded to a ceramic carrier with 100 microinches of...

So I have this bunch of very small InGaAs photodiodes (60-micron diameter) that are wire bonded to a ceramic carrier with 100 microinches of gold over 75 microinches of nickel. Problem is, the entire pad dissolves in 60/40 solder. Good thing I had spares. :( How do you solder to these things? Is 2% silver solder good enough? Thanks Phil Hobbs -- Dr Philip C D Hobbs Principa...


PIR sensor reacts on power

Started by Sonnich Jensen in sci.electronics.design43 minutes ago 3 replies

Hi all I bought an MP PIR sensor on eBay...

Hi all I bought an MP PIR sensor on eBay ( http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xmp+pir.TRS0&_n kw=mp+pir&_sacat=0 ), which works well, except when plugged in It has its owns battery, and works well when working on battery, but when I plug it in (I need it for longer time that the battery lasts), then it will contact me quite often. It uses a USB m


OT: Gas price

Started by Anonymous in sci.electronics.design2 hours ago 52 replies

With oil at $1, wholesale gas at $1.8. Can't believe we are still paying $4.5 in the west coast. Drove to Arizona to fill up at $2.9. Still...

With oil at $1, wholesale gas at $1.8. Can't believe we are still paying $4.5 in the west coast. Drove to Arizona to fill up at $2.9. Still expensive, but OK. Will drive to Texas to fill up my personal tanker. Question: Is it illegal to smuggle gasoline across state line for personal use?


OT? Shawyer EMdrive Independently "Verified"

Started by nuny...@bid.nes in sci.electronics.design2 hours ago 3 replies

A scientist with "a long history of experimentally testing (and debunking) breakthrough propulsion systems" has replicated the Eagleworks...

A scientist with "a long history of experimentally testing (and debunking) breakthrough propulsion systems" has replicated the Eagleworks results- 20 micronewtons thrust for 700W input. He can't explain it either. http://www.sciencealert.com/independent-scientists-confirm-that-the-impossible-em-drive-produces-thrust However, his experimental setup has some of the same problems a


Breaking the Shannon Channel Capacity Limit

Started by ChesterW in sci.electronics.design2 hours ago 34 replies

These guys claim a new modulation method that exceeds the data transmission rate set by the Shannon limit. Any opinions? Opinions on this...

These guys claim a new modulation method that exceeds the data transmission rate set by the Shannon limit. Any opinions? Opinions on this topic that is, I KNOW you all have considerable opinions on other issues ;) http://www.astrapi-corp.com ChesterW


How to blow up an LM395

Started by George Herold in sci.electronics.design2 hours ago 9 replies

http://www.ti.com/lit/ds/symlink/lm395.pdf I use these as "bullet proof" output pass elements. One is used to drive a 50 ohm heater. (~30V...

http://www.ti.com/lit/ds/symlink/lm395.pdf I use these as "bullet proof" output pass elements. One is used to drive a 50 ohm heater. (~30V p-p PWM) I had a few reports that the circuit would not turn off, it was always heating. I had one user ship the board back. Indeed the LM395 was toast. I tried everything to destroy another one, Short circuit the load, change the load... I le...


rant: Sears Sucks

Started by John Larkin in sci.electronics.design3 hours ago 3 replies

There are only two appliance stores in the small town of Truckee, and Sears is close to us. We've bought appliances and beds from them,...

There are only two appliance stores in the small town of Truckee, and Sears is close to us. We've bought appliances and beds from them, and they have been great. But it's an affiliate store, a Sears product reseller, not corporate. When you walk in, the store owner (a former Silicon Valley engineer) meets you, and he's friendly and funny and really sells you the best option. The products ...


ot, great war book

Started by John Larkin in sci.electronics.design3 hours ago 29 replies

...

http://www.amazon.com/Guns-Last-Light-1944-1945-Liberation/dp/1250037816/ref=sr_1_1?ie=UTF8&qid= 1437500561&sr=8-1&keywords=guns+at+last+light This is a fabulous book. It's the third of a triligy, but I read this one because I prefer the parts where we're winning. It's a great detailed description of the war in Europe, starting a bit before d-day. It's full of quotes from meetings, newspa


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