isolated mosfets

Started by John Larkin in sci.electronics.design6 hours ago 6 replies

I'm not having much luck searching for isolated-tab mosfets. Ideal would be a dpak n-channel. Any suggestions? -- John Larkin ...

I'm not having much luck searching for isolated-tab mosfets. Ideal would be a dpak n-channel. Any suggestions? -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over Reason"


SMD footprints

Started by Ed Lee in sci.electronics.design8 hours ago 21 replies

When i was using another PCB design tool, i built my own smd footprints . To do a quick prototype, i am using the linux "pcb" tool and the...

When i was using another PCB design tool, i built my own smd footprints . To do a quick prototype, i am using the linux "pcb" tool and the build-in footprints. The build-in footprints have pads with the same size as pins. When i build my own, i found it helpful to extend the pads beyond the pins. With enough flux, just let the solder suck in from the extended area into the pins. Also, it's ...


ACA case dismissed for no standing.

Started by amdx in sci.electronics.design10 hours ago 35 replies

I frequent early retirement groups. Most of the posters have one or more millions and are living of of the growth and dividends. All fine and...

I frequent early retirement groups. Most of the posters have one or more millions and are living of of the growth and dividends. All fine and good, but they are also very keen to control their incomes to stay at a level to get a nice subsidy on their healthcare insurance. The thread today had at least 20 of those happy millionaires responding with glee that the ACA is still with us. ...


Wetting current

Started by Klaus Vestergaard Kragelund in sci.electronics.design13 hours ago 31 replies

Hi I am working on a design where we are monitoring a relay, if it has been energized. That is done with high ohmic resistor and a source...

Hi I am working on a design where we are monitoring a relay, if it has been energized. That is done with high ohmic resistor and a source voltage, detecting a current when drawn But, contact wetting could be a problem, so have added a small capacitor on the contacts, so when they are closed a relatively high current runs for a short period of time to punch through the oxide layer of ...


LCD drivers

Started by John Larkin in sci.electronics.design13 hours ago 11 replies

https://www.marketwatch.com/story/the-tiny-1-chip-that-is-behind-record-price-increases-for-comp uters-11623958037?mod=home-page Does anybody...

https://www.marketwatch.com/story/the-tiny-1-chip-that-is-behind-record-price-increases-for-comp uters-11623958037?mod=home-page Does anybody have any FTDI FT800s? Maybe swap for something you need? -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over R


'Gold Standard' Data Shows Much Longer Droughts in West

Started by Fred Bloggs in sci.electronics.design15 hours ago 10 replies

Western U.S. is well on its way to becoming a permanently parched wasteland. Desertification always starts with significant shifts in rain...

Western U.S. is well on its way to becoming a permanently parched wasteland. Desertification always starts with significant shifts in rain patterns that no longer support life. "Rainstorms grew more erratic and droughts much longer across most of the U.S. West over the past half-century as climate change warmed the planet, according to a sweeping government study released Tuesday th


Solar power percentage of charge control ??????

Started by Unlisted in sci.electronics.design20 hours ago 52 replies

Im setting up a low powered FM radio station transmitter to play continuous music 24/7 from a remote off grid location. The entire setup will...

Im setting up a low powered FM radio station transmitter to play continuous music 24/7 from a remote off grid location. The entire setup will run from solar panels and batteries. The station will consist of the transmitter, a small mixer board, audio compressor, and a laptop computer filled with MP3 music. The station should run 98% of the time without human intervention. But many cloudy...


WWW Source Code For Sale

Started by Dean Hoffman in sci.electronics.design1 day ago 6 replies


California Is Climate Disaster

Started by Fred Bloggs in sci.electronics.design1 day ago 35 replies

The drought and heat waves are not something temporary, they are the new climate. Any relief from these conditions is what's temporary. This is...

The drought and heat waves are not something temporary, they are the new climate. Any relief from these conditions is what's temporary. This is the new reality, get over it. In 2020 the smoke from wildfires reduced solar farm outputs by as much as 30% in places. Wonderful. https://www.latimes.com/environment/newsletter/2021-06-17/california-hottest-driest-days-getting -drier-worsening-fire-ri


Toyota's Developing A Hydrogen Combustion Engine

Started by Fred Bloggs in sci.electronics.design1 day ago 17 replies

Very good engineering overview of the challenges, hurdles, and performance considerations involved in the development. Hydrogen combustion...

Very good engineering overview of the challenges, hurdles, and performance considerations involved in the development. Hydrogen combustion technology is not going mainstream anytime soon if ever. https://www.youtube.com/watch?v=3IPR50-soNA


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