Electronics-Related.com

Win11 repair

Started by john larkin in sci.electronics.design5 months ago 145 replies

I just "upgraded" from Windows 7 to 11. The new PC is a lot faster running Spice. But the File Explorer is a horror. When I drag/drop a...

I just "upgraded" from Windows 7 to 11. The new PC is a lot faster running Spice. But the File Explorer is a horror. When I drag/drop a file, the cursor becomes a giant ugly icon. When I copy a file where a copy already exists, I have to go through a secondary dialog to compare file attributes. If I right-click on a file, simple things like delete and rename are a secondary operation!...


Substitutes for the 7400 family....

Started by John Robertson in sci.electronics.design5 months ago 22 replies

I'd like to verify that 74F##(#) family can replace the 74##(#) chips which are getting rather expensive or of unknown (?) quality if one is...

I'd like to verify that 74F##(#) family can replace the 74##(#) chips which are getting rather expensive or of unknown (?) quality if one is second sourcing them from folks like Unicorn, or eBay (shudder). I am well aware the 74LS has may replacements including the 74ALS, 74HCT, and others, but they only fan-out to 10 LS gates or 1 original gates. I have older games that need reliabl...


Using Agent?

Started by john larkin in sci.electronics.design5 months ago 2 replies

I'm trying to get this new Win11 system to make sense. I got the new version of the Agent newsreader. It works, but for one weird thing: If...

I'm trying to get this new Win11 system to make sense. I got the new version of the Agent newsreader. It works, but for one weird thing: If someone includes a web link somewhere inside their post, and I open their post, Agent launches the link in my browser. Does anyone else see this? Know of a fix?


UV meter, 220nm, recommendations for purchase

Started by Klaus Kragelund in sci.electronics.design5 months ago 3 replies

Hi I need to purchase a UV meter to measure on a UV driver. Wavelengt is 220nm. Can anyone recommend a good cheap variant? I have been...

Hi I need to purchase a UV meter to measure on a UV driver. Wavelengt is 220nm. Can anyone recommend a good cheap variant? I have been recommended: USB2000+ and from: http://aseq-instruments.com/ Regards Klaus


Novel 1.7v Blue OLED

Started by Martin Brown in sci.electronics.design5 months ago 5 replies

A breakthrough in low voltage blue LEDs announced recently this manages to produce 2.7eV blue photons from an applied voltage of 1.47v! It is...

A breakthrough in low voltage blue LEDs announced recently this manages to produce 2.7eV blue photons from an applied voltage of 1.47v! It is the chemical equivalent of a Cockcroft-Walton voltage doubler. https://www.sciencedaily.com/releases/2023/09/230920110657.htm Or for more details the Nature paper (may be behind a paywall) https://www.nature.com/articles/s41467-023-41208-7 It...


RJ45 (8P8C) alternatives IN USE for ethernet

Started by Don Y in sci.electronics.design5 months ago 17 replies

It seems like nothing is coming close to replacing (or, acting as an alternative) RJ45's for ethernet applications. I've encountered ND9's and...

It seems like nothing is coming close to replacing (or, acting as an alternative) RJ45's for ethernet applications. I've encountered ND9's and M8's/M12's on some kit but primarily industrial applications. Any other alternatives that are in "widespread" use (i.e., an application domain with which I might have to interact so "plan ahead")? For daughtercard connections, I imagine anythin...


lots of vias

Started by John Larkin in sci.electronics.design5 months ago 4 replies

...

https://www.dropbox.com/scl/fi/vcp5qiwxt59cjht493ps2/P945A_top.jpg?rlkey=0qov5oq9dk7pwcqfs6ttspv xm&raw=1 https://www.dropbox.com/scl/fi/gpxexekknt7pl0gyfzl03/P954A_bot.jpg?rlkey=tsgj15uwykg6l1fl2x0llht 3z&raw=1 Each of the eight dpak fets has 400 filled vias from top to bottom copper. If I hold the board at just the right grazing incidence, looking at a distant light, I can barely see th


nanoimprint again

Started by John Larkin in sci.electronics.design5 months ago 4 replies

https://www.theregister.com/2023/10/13/canon_nanoimprint_litho/ That would be cool, go directly from e-beam to tiny stamps without all those...

https://www.theregister.com/2023/10/13/canon_nanoimprint_litho/ That would be cool, go directly from e-beam to tiny stamps without all those tin droplets and optics.


Six-pointed stars in JWST images

Started by Jeroen Belleman in sci.electronics.design5 months ago 19 replies

The six-pointed stars we see in all JWST images are rather disturbing, yet, it should be easy enough to filter them out. Why don't...

The six-pointed stars we see in all JWST images are rather disturbing, yet, it should be easy enough to filter them out. Why don't they? Jeroen Belleman


temperature compensating a laser diode

Started by John Larkin in sci.electronics.design5 months ago 5 replies

LEDs and lasers get way more efficient when they are cold. But their junction drop increases too. So it seems that driving them from...

LEDs and lasers get way more efficient when they are cold. But their junction drop increases too. So it seems that driving them from some magical Thevenin source would temperature compensate the light output. Has anyone done this? I need to hold some dBm level from a laser source from -40 to +85C and that might be a simple way to do it.


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