Hysterical* power supply.

Started by George Herold in sci.electronics.design2 days ago 27 replies

So more spad stuff, I was trying to trigger the one shot right from the comparator,cless delay. But the comparator output only goes to ~1V of...

So more spad stuff, I was trying to trigger the one shot right from the comparator,cless delay. But the comparator output only goes to ~1V of the rails, which works for one shot.. but if another comes right away, then there's issues. (oh this is with an AD8611 as comparator.) https://www.dropbox.com/s/6cic0wvxuqymgtj/Hyterical%20PS.JPG?dl=0 well it worked, maybe this post is just to ...


Who wants 1 million euros?

Started by brix in sci.electronics.design2 days ago 3 replies

I have to take these arbitrations. There is the figure the city and the referee judge of the organization. Who can help me? ? 30,000,000 ...

I have to take these arbitrations. There is the figure the city and the referee judge of the organization. Who can help me? ? 30,000,000 Turin (foot) ? 18.000.000 Rome (penis) ? 13,500,000 Milan (hand) ? 2,800,000 Ravenna (hand) ? 2,200,000 Rimini (hand) ? 1,500,000 Siena (ax) ? 800.000 Bari (foot) ? 700,000 Verona (foot) ? 650.000 Ferra


micro-chip

Started by John Larkin in sci.electronics.design3 days ago 27 replies

I've been pushing (ie, blowing up) come Cree SiC power fets, the 1200 volt 280 mohm part in TO247. It sure looks like thermal runaway. Just...

I've been pushing (ie, blowing up) come Cree SiC power fets, the 1200 volt 280 mohm part in TO247. It sure looks like thermal runaway. Just for fun I ground one down. https://www.dropbox.com/s/hnu2b7qlfw98bwq/Cree_Chip.JPG?raw=1 No wonder it blows up. The actual chip is tiny, so all the heat is in one spot. Why bother to put it in that giant TO247 package? A healthy mosfet die woul...


RF broadcast front end

Started by bitrex in sci.electronics.design3 days ago 15 replies

What kind of options are there now for integrated RF receiver front ends for the FM radio broadcast band? Particularly interested any...

What kind of options are there now for integrated RF receiver front ends for the FM radio broadcast band? Particularly interested any solutions that would allow use of a small form-factor antenna, maybe a tuned input network with more gain than usual would work, I don't need the whole band's worth of bandwidth just to receive just a MHz or two of it.


current monitor

Started by John Larkin in sci.electronics.design3 days ago 32 replies

I might want to add a power supply current monitor to a product. The supply is 48 volts and I expect a huge amount of EMI. There are lots of...

I might want to add a power supply current monitor to a product. The supply is 48 volts and I expect a huge amount of EMI. There are lots of dedicated chips to do this, but just a few that work at 48 volts. I can do this from parts that we have in stock: https://www.dropbox.com/s/b6bfjv5v8vwv7nm/Isense_1.JPG?raw=1 I wonder if that's the best place for C1. I can put my power LED ...


PIC/dsPIC development

Started by bitrex in sci.electronics.design4 days ago 88 replies

I might have to work on a project involving dsPIC code which I don't have a lot of experience with, I'm primarily an AVR and ARM guy. What's...

I might have to work on a project involving dsPIC code which I don't have a lot of experience with, I'm primarily an AVR and ARM guy. What's the hip current toolchains/dev boards y'all like to use for PIC development on Linux or Windows desktops nowatimes?


OT: Lefties caught out again!

Started by Cursitor Doom in sci.electronics.design5 days ago 60 replies

Up to their old false-flag tactics yet again! The "alt-right" (whoever that is) would have been vilified for this stunt, if only the Lefty...

Up to their old false-flag tactics yet again! The "alt-right" (whoever that is) would have been vilified for this stunt, if only the Lefty culprit had been less of a heedless moron. Then they might just have got away with it. Better luck next time, Lefties! :-D https://tinyurl.com/ycy7gv6zT -- This message may be freely reproduced without limit or charge only via the Usenet p...


Replacing my electronic parts supply after Hurricane Micheal

Started by amdx in sci.electronics.design5 days ago 11 replies

Hi all, I had several part drawer units filled with resistors, capacitors, ICs, Feet, Diodes, FETs, and more all for personal hobby...

Hi all, I had several part drawer units filled with resistors, capacitors, ICs, Feet, Diodes, FETs, and more all for personal hobby use. After the shingles and roof panels left the drywall came down and let the water in. My drawers were filled with water. I don't want to count every part. Do you have a favorite parts rack filled with 1/4 watt resistors 5%. A rack of Electrolytics ...


RAM temperature sensors needed soon.

Started by Anonymous in sci.electronics.design5 days ago 13 replies

Cryptocoins may start using algorithms which can be executed fast only on CPU-RAM chips. Problem with this is current hardware has no RAM...

Cryptocoins may start using algorithms which can be executed fast only on CPU-RAM chips. Problem with this is current hardware has no RAM temperature sensors ?!?!? Therefore I am requesting this feature to be added to new hardware as soon as possible. Bye, Skybuck.


locked :-:)

Started by Anonymous in sci.electronics.design5 days ago 16 replies

After having a fight with writing the LMX2332 software, a story apart, found old windows version on some ham site, booted old computer with...

After having a fight with writing the LMX2332 software, a story apart, found old windows version on some ham site, booted old computer with win98, (wine did not like it at all), old PC lithium BIOS backup was dead, `wrong graphics card win98 did not have the driver, finally started National's 'code_loader4' program, compared the binary bits to my software, did not make any sense (theirs) but...


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