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.

https://www.ti.com/product/ADC32RF54 $1500.

https://www.ti.com/product/ADC32RF54 $1500.

There has been conjecture here about lithium battery ignition, thermal runaway, and whether any measurements could provide useful warning of a...

There has been conjecture here about lithium battery ignition, thermal runaway, and whether any measurements could provide useful warning of a possible cell explosion. Waiting for my biscuits to cook, a (very) little research turns up not much about failure dynamics. Most studies measure external cell temperature as indicators of thermal runaway. I found one study, from NREL, that used f...

'New research, based largely on information from the Copernicus Sentinel-1 and ESA’s CryoSat satellite missions, has revealed alarming...

'New research, based largely on information from the Copernicus Sentinel-1 and ESA’s CryoSat satellite missions, has revealed alarming findings about the state of Antarctica's ice shelves: 40% of these floating shelves have significantly reduced in volume over the past quarter-century. While this underscores the accelerating impacts of climate change on the world's southernm

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...

https://www.theguardian.com/business/2023/aug/28/phoenix-microchip-plant- biden-union-tsmc Posed in front of an American flag and a large...

https://www.theguardian.com/business/2023/aug/28/phoenix-microchip-plant- biden-union-tsmc Posed in front of an American flag and a large banner reading ?A Future Made in America Phoenix, AZ,? Joe Biden told a crowd of assembled workers, supporters and media last December: ?American manufacturing is back, folks.? Eight months on, the Phoenix microchip plant ? the centerpiece of Biden?...

The system is designed to destroy short-range projectiles too close for the Iron Dome system to intercept effectively. It should be good for...

The system is designed to destroy short-range projectiles too close for the Iron Dome system to intercept effectively. It should be good for drones too, taking a cue from Ukraine where they're proving to be very disruptive. Drones are moving slow enough to get adequate dwell time out of the laser. IIRC the system, which has been in development for a while, was originally designed as

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!...

If Ukraine and Russia make peace, who keeps the Russian occupied land?

If Ukraine and Russia make peace, who keeps the Russian occupied land?

Air purifiers aren't enough to clean your home from wildfire smoke ...

Air purifiers aren't enough to clean your home from wildfire smoke https://arstechnica.com/science/2023/10/air-purifiers-arent-enough-to-clean-your-home-from-wild fire-smoke/ May be important to some here!