10 more posts in this thread. [Missing image file: zmotymn.jpg]
Always had an interest in jewelry, specifically ring making, for a while. I've mixed and matched stones to settings a few years back with various success, but it's opened my eyes to how cheap good quality precious stones can be.
I'd like to know how feasible it is to enter the craft from basically no experience, without formal education of it either. I'm an artist, so the designing isn't what needs to be learned, just the techniques and skills. The tools required is the other half of my question, and off the top of my head, I would need a ring mandrel, a flex shaft tool, a kiln, and various files,anything I'm missing? Obviously wax blanks.
I'd like to work with primarily gold and silver, so I'm not sure what kiln would be most economical, as I don't even know what qualities other than max temp to look for.
9 more posts in this thread. [Missing image file: N8VEM11.jpg]
Homebrew computers seem like fun.. But these days the CPU selection seems bit awkward. There are tons of different stuff out there, but I don't really understand the differences. Could you build a computer with a MCU? How will it differ from CPU-based ones? I guess the main difference being the external interfaces, CPU having high-speed interface for external ram and stuff, while MCU must rely on everything builtin? Could you add something like PCI (conceptually similar, not necessary exactly the same) to MCU, so that you could plug in your own extension cards?
Thinking of it, cortex-m4 chips are 32bit, and run at tens of megahertz. So could you build a computer that would be equivalent of a 386/Amiga then?
I was thinking of some kind of architecture where the CPU would be connected to some kind of "north bridge", which in turn would be connected to the main memory and the peripheral bus. That way the peripherals should be able to access the memory directly, which should be good, right? The "north bridge" would also mux the interrupts from all the peripherals to one place maybe? Does that make any sense at all?
Anyways, how would you pick the CPU for your computer? What practical options are there?
5 more posts in this thread. [Missing image file: CAM00474.jpg]
Plastic "hourglass", takes about 30 sec for black liquid (oil?) to go from one chamber to the other. Clear liquid (water?) stays separate of the black liquid and is lighter than the black, making it stay above the black liquid. There is also air in the system, which of course stays on top. Object has a small rubber "cork" to isolate the system.
I once removed the cork because of curiosity at some time between 1998 and 2006. After I did this, the behavior of the object changed. The bubbles of the black liquid used to run smoothly in an expectable pattern, and with an even size when passing through the chamber separator. Now it's just a chaos, bubbles vary in size and there is always excess black liquid in different parts of the system when it comes to a standstill. I am not sure if there was any air in the system or not before I removed the cork.
>Is there any way I can restore the object to its former glory?
15 more posts in this thread. [Missing image file: MEM 100amp fuses on three phase supply.jpg]
/diy/, is it possible to blow a FUSE without blowing a BREAKER of a lower value in the same line?
I don't actually need to do this, but the thought crossed my mind, as I'm trying to study but being discouraged from doing so by assholes blasting music at one in the fucking morning. So, instead of studying I've been thinking about how one could blow a very large fuse (maybe 600 amps or so) with only having access to a 15 amp circuit. My building, I believe, has a large fuse on each phase on the disconnect where the power comes into the building.
Now, I know that breakers use electromagnetism to break the circuit, while fuses use the principal of ohmic heating. I've been thinking, what if one were to dead-short the circuit for a very short amount of time, too quick for the breaker to respond to it. The wire inside the fuse would heat up a slight amount, wouldn't it? While the breaker wouldn't have time to react and would be unaffected. Now what if one were to repeat that dead-short at maybe 100hz or so? The breaker would not have time to trip and would 'recover' instantly from the overcurrent, while the wire inside the fuse would continue to heat up. Do that enough, and perhaps the wire would melt through and the fuse would blow.
I have a flashlight, I can work in the dark, but the assholes' subwoofer can't. Of course, this is assuming that the assholes' room and mine are on the same phase, because this would only knock out one phase.
These are the thoughts that go through my mind late on a Thursday night....
(also, "possible malicious code in image file"? What the fuck?)
6 more posts in this thread. [Missing image file: 1791-shop-lights.jpg]
I am working on my shop lighting this weekend, and I thought I would see what you guys are doing.
My current setup is similar to the one in the picture. I have four 2-bulb fluorescent fixtures. Additionally, I have one incandescent fixture on a circuit that is different than any of my shop tools. That way, in case I trip a breaker, I don't have a saw spinning down in the dark. The second purpose is to help alleviate any strobe effect from the fluorescents.
The thing is, the fluorescent light is horrible to work by. It looks like you can see, but it is actually a very dim light. When I need to see details, I constantly pull over a drop lamp.
The easy answer is to put in a bunch of halogen or incandescent fixtures, but I don't want to load my entire circuit with lighting.
tl/dr: Have any of you thought through shop lighting? What did you do?
I have no idea where to look!
16 more posts in this thread. [Missing image file: push lock.jpg]
I am working on a new project, and I have found something that works well for my needs, I just have no clue where to find more! I called a locksmith and they called them 'privacy lock keys', but a search yields no promising results. Curses world, you got me again!
But on a related note, I need something similar to the image, but completely round at the top and without the...smush I guess....at the bottom. Sometimes they come with new houses with push lock doors.
3 more posts in this thread. [Missing image file: painting-fresco_2316720b.jpg]
>get new desk
>want a chair
>black friday amazon sale
>buy £200 leather office chair for £39.99
>arrives when freinds are round
>set it up
>no stitching on the seat part, leather jsut wrapped around cushion.
>friends go "well it was on sale, guess you better return it"
>go into attic, get box of strings and sewing kit of my grans she left here ages ago
>select matching string to stuff on back part, thread needle and sew the seams up.
>looks better than all the machined stitching on the rest
>bros looking at me like im mad
>"h-how did you do that? where did you learn how to sew?!?"
>mfw i have never done it before and just /diy/'ed the problem and they are acting like im crazy or poor as shit.
How do you freinds react to your /diy/ antics, be they minor or grand in scale.