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Although its much less hazardous than methanol or ethylene glycol. Apparently early uses of isopropyl included as an anesthetic for animals, but there were too many issues with side effects (probably because its a CNS suppressant that also metabolizes into formaldehyde, another CNS suppressant).

China says between $60 and $90. FOB. MOQ of 100. That's per Kg. And probably just a cube, I don't have a technical drawing for an actual dive weight. So roughly 10x the cost of lead. Bit spendy!

High pressure sintered with a nickel binder... Not something you can do at home, and while its not hard to have done, might be a bit pricey for something as big as a dive weight. Anyone emailed China to ask for a price yet? (Ok, yes I have. Lets see).

Tungsten Shot-Tungsten Shot Manufacturers, Suppliers and Exporters on Alibaba.comGlass or get Tungsten shot from China! Prices range from $1 per Kg all the way up to $300/Kg! Who knows. But might be fun to order some and see what you actually get. Then make some epoxy blocks filled with Tungsten.

I like your ideas and want to know more, do you have a newsletter I could subscribe to? Also: Looks like the base cost of Tungsten is around $100/lb. If you really want to try it out, go for it in powdered form. You can put that in a bag, or add it to epoxy to mold it. Unfortunately Tungsten...

By flood I meant have your +5V and GND traces each part of the flood, its not super important, but its kinda nice. And I use either OSHpark or SeeedStudio. Although I'm normally ordering stuff in 2oz copper, so its more expensive and longer lead times. Seeed also have low cost PCBA if you don't...

Might be kind of awesome to use those 2 inputs for the two hoses... Maybe re purpose one of the exhausts for a DSV (certainly not have them function as exhausts that would ruin a major point of using a double hose reg). Although I suspect you'll end up with quite high WOB... And I can't tell...

I'm an Eagle user so I can't help with KiCAD. But your board looks nice. 2 suggestions though. Firstly, there's no reason for the two ring traces to not be flooded (so they take up all the unused board). Secondly you should add mounting holes. Even if you don't end up using them its a nice...

Service bureaus have gotten really cheap and easy to use these days, if you only want one or two things its a much simpler and cheaper way to go. I was fortunate enough that my wife let me take up a large percentage of our tiny apartment with my 3D printer, which ended up getting quite out of...

Totally different things. The computer has a receiver for the AI, which is on a totally different frequency to Bluetooth, plus it doesn't have a transmitter of any kind.

They are really not kidding. There was a guy who really did burn his house down. :gulp: 300C ? really? I'd be worried about damaging your printer! Typical PLA temps are 185-220C. With most modern printers (post 2015 I guess) being around 220C Maybe 220C, I've never used that printer. Actually...

Glass and the purple elmers glue sticks. That or PEI sheets. And I stopped using ABS many years ago. Its trash. Very hard to print with and the only advantage over PET if you can chemically weld it. Not a small advantage I know, but not worth the fumes and failed prints. Now its PLA, PET or if...

The neopixel's use their own protocol, yes its 8 bit, no its nothing like DMX (1992 or otherwise). DMX has never been anything to do with 0-10v systems. Those were replaced by AMX192 (which Stand Lighting agreed to publish and effectively kill as part of the industry wide adoption of DMX, which...

Well this is a well hidden sub... But in answer to the OP's question: Right now Fusion360, its the right mix of features and price (compared to Inventor or Solidworks it crazy cheap for what you get). For reference, I've shipped products designed in Creo (the thing that replaced Pro-Engineer...

I ordered a bunch of stuff and you people need to stop distracting him so he can SHIP ME MY STUFF!!! (waves fist at the screen) (grumble grumble)

Ah, I understand. I think if you stop thinking of the connection as 'one' knot, but rather as two knots with a short length of line between it will be much easier to get what you want. Then you just need to pick knots that hold things in a way you like.

While there are times that whipping parts together is useful (for keeping them stationary relative to each other), people always want to use a lot more cord and knots than are really needed. In Scuba you are generally not worrying about the SWL or WLL of your attachments (and if you are, throw...

You're darn right i want one of those! That's AWESOME! If I'm carrying a bunch of otherwise useless lead, why the heck wouldn't I swap some of it out for an awesome tool like that!?! Might not include it as part of my travel kit though...

You want one of these! Well, without the tip damage. I might have bought one at an antique store. And I might be 3D printing a not terrible sheath for it. And I might be planning on carrying it because it makes a great pry-bar, or hammer. And maybe I'll cut into the back of the blade to add...

From the previous link: 'Engine induction and ships supply outboard valve' is my best guess. The picture also identifies that long pipe, another part of the air supply for the boat when on the surface running the engines. Makes sense given the size and shape in the other drawing. Its a bit...