Recent content by DaveE

Or good risk assessment. I doubt that he was nonchalant. It took him more than 40 years to die of cancer at age 70, which also happened to a lot of people that didn't watch an A-bomb. This, except 'analyze the nature and source of the hazard' was left out. That's done first. I'm not saying...

Y'all would be appalled at what engineers did in the cowboy days of the laser manufacturing business. They were careful (usually, LOL), they knew what they were doing, but they didn't usually wear glasses*. They complained that the glasses made it hard to see the beam(s) they were working with...

Your laser will have a label that describes the hazard level (class). You might or might not need eye protection. Don't stare into the beam. Position the laser close to your lens so shiny reflective things aren't likely to intervene. Once it's expanded into a line it is unlikely to be a...

Also for an easy kludge, a hose clamp and foam tape around the lens. Not great in the optics world, but you get what you pay for. It'll work.

If you are so inclined, you can make a good clamp with simple tools in a block of whatever (I'd use Aluminum). Drill a hole just a tiny bit larger than the lens, cut a slot, and squeeze it gently with a screw. Like this: PS: Don't make the flexure side (opposite the cut) as large as I drew it...

You can just use a good epoxy to glue it to whatever you can find (hint: eBay...). You shouldn't need anything special. You probably will need some sort of tooling (masking tape?) to hold it in the position you need. If you do want to spend a bunch of money on a special mount look at Thor Labs.

https://www.c3controls.com/white-paper/what-are-the-advantages-and-disadvantages-of-programmable-relay-controllers?srsltid=AfmBOorMhoyDMy_WrBA0PvDvSrT9VLhoNK1SBO9knxpp7WkmGc37Aa-M

He asked about "more effective", not just more. Your example is good, but maximum power for a given line isn't really the point. Utilities simply don't want to operate in this very lossy region with poor load regulation. I interpret this more like minimum losses (cost, really) for a given user...

Khan academy has some really good tutorials about basic circuit analysis. You may find studying that more productive than this approach.

But as others have said ##R_W## isn't necessarily a constant. I don't think maximum power delivery is the only metric to optimize, this leads to very inefficient solutions. Other things a utility may value: 1) Infrastructure costs. 2) Operating costs. 3) Power quality. 4) Reliability...

Key point here. You add the vectors, with amplitude and phase, before you calculate intensity (energy). ##(A_1+A_2+A_3)^2 \neq A_1^2+A_2^2+A_3^3## for vectors

Some might (esp. motors), others will be OK. Many will be unknown because the designers don't design for or test things you aren't supposed to do.

If nothing else it's a thing to stare at and wonder about for a bit.

It is standard practice these days for the ground connection to be made first and broken last when HV connectors are inserted or removed. This is in most safety standards. Also, it looks kind of expensive, but IDK.

That's my guess too. It's too simple not to work at all. Scanning has an advantage in brightness over divergent optics. PS: Google says laser levels don't scan though.