High Temperature Battery

Started by Klaus Kragelund in sci.electronics.design2 hours ago 5 replies

Hi I need a battery for high temperature operation I may be able to use only a coin cell non-rechargeable, like this...

Hi I need a battery for high temperature operation I may be able to use only a coin cell non-rechargeable, like this one: http://data.energizer.com/pdfs/377-376z.pdf But it has no temperature max data, I need minimum 60 degrees c Anyone know the max temperature from the technology used? I need minimum cost, 10 years operation (so reduced leakage) and as always minimum cost (very ...


Schottkys in series

Started by George Herold in sci.electronics.design2 hours ago 19 replies

Quick question. Can I put three 70 V schottkies in series and have them hold off 150 V? (maybe I can try before you answer.) George H.

Quick question. Can I put three 70 V schottkies in series and have them hold off 150 V? (maybe I can try before you answer.) George H.


Cell phone use causes tongue cancer

Started by Jeff Liebermann in sci.electronics.design4 hours ago 87 replies

I have discovered definitive proof that talking on a cell phone use causes cancer. It's not the usual cancer of the brain, or central nervous...

I have discovered definitive proof that talking on a cell phone use causes cancer. It's not the usual cancer of the brain, or central nervous system. It's cancer of the tongue. https://seer.cancer.gov/faststats/selections.php?run=runit&output=1&data=1&statistic=1&year=2018 01&race=1&sex=1&age=1&series=cancer&cancer=6 Notice the steady increase in new cases of tongue cancer since 1990, an


AD633 Spice Model Now Available

Started by Jim Thompson in sci.electronics.design9 hours ago 4 replies

On the Device Models & Subcircuits Page of my website you will find a new post... AD633_JT.zip A Rudimentary Behavioral Model...

On the Device Models & Subcircuits Page of my website you will find a new post... AD633_JT.zip A Rudimentary Behavioral Model of Analog Devices AD633 Analog Multiplier suitable for most transient analysis situations. However Noise, CMRR and Feed-Thru are not modeled. ...Jim Thompson -- | James E.Thompson ...


remarkable opamp

Started by John Larkin in sci.electronics.design13 hours ago 8 replies

http://www.ti.com/product/OPA197/description The data sheet is as impressive as the part itself. It talks about the things that most opamp...

http://www.ti.com/product/OPA197/description The data sheet is as impressive as the part itself. It talks about the things that most opamp data sheets avoid. -- John Larkin Highland Technology, Inc lunatic fringe electronics


FTDI chips VCP or VX drivers

Started by mook Jonhon in sci.electronics.design13 hours ago 60 replies

Looking into a test box that will need a USB input. I have always taken the easy route and used a Virtual Com Port chip form FTDI and run it...

Looking into a test box that will need a USB input. I have always taken the easy route and used a Virtual Com Port chip form FTDI and run it to a SCI port on a microcontroller. It appears I can use the chip as a native USB device instead of a virtual Com Port and I was curious as to the advantages to this approach. Have any of you used a FTDI as a native USB device in Windows 7 or 10...


Tesla Turning the Corner

Started by Anonymous in sci.electronics.design14 hours ago 20 replies

Tesla will have an earnings report on Aug 1. Consensus estimates of earnings for the quarter is $-3.61. That's over half a billion dollars. ...

Tesla will have an earnings report on Aug 1. Consensus estimates of earnings for the quarter is $-3.61. That's over half a billion dollars. However, now that they have production up to 5000 Model 3's per week, they will be bringing in around $3.25 Billion per quarter just on Model 3 production. So I would be surprised if they didn't turn a profit next quarter and for future quar


three terminal volt regulator

Started by George Herold in sci.electronics.basics18 hours ago 11 replies

Hi all, Simple question. Some 1/2 amp LM7805 is obselete (TO-220 pac) I need a replacement. So either a 1 amp...

Hi all, Simple question. Some 1/2 amp LM7805 is obselete (TO-220 pac) I need a replacement. So either a 1 amp 7805 http://www.onsemi.com/pub/Collateral/MC7800-D.PDF or a LM340 http://www.ti.com/lit/ds/symlink/lm340.pdf Is there any (practical) difference between the two? (besides the price.) George H.


T50-2 toroid

Started by bitrex in sci.electronics.design22 hours ago 41 replies

I have a bunch of T50-2 powdered iron RF toroids I got at fire sale price. Do you think they could be pressed into service as low power...

I have a bunch of T50-2 powdered iron RF toroids I got at fire sale price. Do you think they could be pressed into service as low power flyback transformers for large step-up ratios e.g. 5 volts to 48 From other user's data it looks like they give about 50uH inductance per 100 turns @ 250kHz I'm pretty confident I could wind about 150-200 turns of 28 gauge magnet wire, overlapping, on ...


LT Spice thumbnail

Started by John Larkin in sci.electronics.design1 day ago 9 replies

If I single-click on an .asc file in Windows Explorer, I see the schematic thumbnail at the bottom of the window. How does that work? It...

If I single-click on an .asc file in Windows Explorer, I see the schematic thumbnail at the bottom of the window. How does that work? It works for symbols too, .asy files. Does Windows invoke LT Spice to make the thumbnail images? -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.hi...


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