OT: Trump's UK Visit

Started by Cursitor Doom in sci.electronics.design2 hours ago 124 replies

Just out of curiosity and to have my suspicions confirmed, I've been watching the TV coverage of Trump's visit to Britain and just as I...

Just out of curiosity and to have my suspicions confirmed, I've been watching the TV coverage of Trump's visit to Britain and just as I thought, virtually all of the usual suspects in the mainstream media are focusing on the demonstrations against his him, trying to make it look as if everyone in the UK detests Trump and everything he stands for. As expected, CNN, the BBC and rest of thi...


Cell phone use causes tongue cancer

Started by Jeff Liebermann in sci.electronics.design4 hours ago 36 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


low current limit

Started by mook Jonhon in sci.electronics.design4 hours ago 16 replies

I thought I'd bounce this off you folks. I have a design that requires two independant current limits. Voltage source is up to 30V and it...

I thought I'd bounce this off you folks. I have a design that requires two independant current limits. Voltage source is up to 30V and it need to limit peek current to 20mA peek when the 30V output is shorted to ground. There is also a requirement that two independant and different current limits are in series to assure this does not happen if one fails. I can't use the switching reg...


T50-2 toroid

Started by bitrex in sci.electronics.design8 hours ago 5 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 ...


Installing LTSpice IV vs XVII

Started by Anonymous in sci.electronics.design10 hours ago 6 replies

I'm on a newer machine that hasn't had LTSpice installed as yet. My most recent download is years old and won't update because ADI isn't...

I'm on a newer machine that hasn't had LTSpice installed as yet. My most recent download is years old and won't update because ADI isn't supporting the old Linear web site I suppose. I see they have an XP compatible download (LTS IV) which also wown't update and a newer XVII version which I expect is current. I recall someone here didn't want to use this newer version. Was that


Electric start for suitcase inverter generator by using its alternator as a BLDC motor?

Started by Johnny B Good in sci.electronics.design12 hours ago 26 replies

I'm posting here in the hope that I can get some guidance on how to add an electric start feature to a cheap inverter generator cursed by the...

I'm posting here in the hope that I can get some guidance on how to add an electric start feature to a cheap inverter generator cursed by the traditional recoil pull starter (the Devil's invention, imho). Apologies beforehand for what is a rather long initial post but I thought it best to appraise you of my thoughts and what I know of the problems involved in my proposed electronic add-...


Single cell AAA to 24V @ ~20mA

Started by mook Jonhon in sci.electronics.design1 day ago 12 replies

I've done some searching for a canned single cell boost circuit that can make 24V from a single AA alkaline, or rechargable AA cell. (1V...

I've done some searching for a canned single cell boost circuit that can make 24V from a single AA alkaline, or rechargable AA cell. (1V min Vin) Outputs is ~20mA but it is only applied for about 10 seconds a couple times a day. I can fine single cell to 3.3 and 5V all day but 24v or even 12V is a high factor. I could roll my own with a flyback with a high turns ratio but I would p...


Heat Records Falling Around the World in 2018

Started by John S in sci.electronics.design2 days ago 15 replies

https://www.wunderground.com/cat6/Heat-Records-Falling-Around-World-2018

https://www.wunderground.com/cat6/Heat-Records-Falling-Around-World-2018


Hacking a depletion MOSFET model

Started by Phil Hobbs in sci.electronics.design2 days ago 42 replies

The LND150 model predicts IDSS of about 2.4 mA, whereas the actual parts cluster very tightly around 1.6 mA. Here's the model--what should I...

The LND150 model predicts IDSS of about 2.4 mA, whereas the actual parts cluster very tightly around 1.6 mA. Here's the model--what should I adjust to fix it? .MODEL LND150 NMOS (LEVEL=3 RS=150.00 NSUB=5.0E13 +DELTA=0.1 KAPPA=1.O TPG=1 CGDO=2.1716E-12 +RD=40.0 VTO=-2.0 VMAX=1.0E8 ETA=0.1 +NFS=6.6E10 TOX=1.0E-7 LD=1.698E...


OT: Where have the bugs gone?

Started by Steve Wilson in sci.electronics.design2 days ago 61 replies

Years ago, I could not drive anywhere without the front of my car getting splattered with bugs. Now there are none. At sunrise, there used to...

Years ago, I could not drive anywhere without the front of my car getting splattered with bugs. Now there are none. At sunrise, there used to be a beautiful chorus of birds welcoming the day. Now there are none. At dusk, there used to be clouds of birds somehow twisting and turning in synchronization without hitting each other. Now there are none. This appears to be a widespread pro...


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