Archived threads in /diy/ - Do It yourself - 155. page

fairly certain theres only 2 ways to change an alloys color/shade:

Paint and heat

what heat does for color depends on the alloy being used I think, but it also effects the strength and durability of the metal as well, so not a great option.

*i could be wrong and there might actually be ways to alter the colors/shades of alloys, but I don't think so.

>>1167182
Hmmm. What about chemicals?
A vinegar mix or even Black Oxide Phosphate?
I know that over time these do darken (seen them in old cargo bays) just looking to give time a helping hand.

>>1167192
yes, hydrogen peroxide will create a black patina on it that is changing the metal itself

>>1158696

Old thread reached bump limit.

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I have 15 UV LEDs and I want to make a UV flashlight. What is the best circuit to make them all work efficiently?
The forward voltage is 3.5 volts, so it would take 4xAA batteries and 15 resistors to make them work.

I'm looking for a circuit (maybe with a dedicated IC) that can step up the voltage and drive 15 UV LEDs from a low voltage like 2x AA batteries.

>>1167010
Personally I'd just run them all from as many Li-Ions in parallel as you wanted with a little dropper-resistor, probably just a single 18650, but if you want to use 2 AAs, maybe a joule-thief would work? It's probably the simplest circuit, but definitely not the most ideal. Since you're considering dedicated control circuits I can assume that you'll want something more sophisticated, to which I'd suggest buying one of those <$2 chinesium boost/buck/whatever converters from AliExpress or ebay. I'm not sure if dedicated LED drivers work at such voltages.

Have you done some wattage calculations to ensure two AAs can keep up? They should unless you've got particularly bright LEDs, but you never know.

TL;DR: I want a 2 axis laser cutter CNC to cut cardboards and thin wood/plywood. (How original! :kappa:). Already confident with motors/linear motion/electronics problematic. I read that what I need is a C02 laser tube.

Here are my questions:

*I have no idea how to determine what the power should be, but I guess I can't take a too powerful one since all i have to do is run it on lower power.

*Is there any good build log/guide/tutorial available to understand the basics of CO2 lasers, the safety ofc (again i'm so scared of lazors), and most importantly how to assemble precisely and effectively the mirrors/lens, etc?

*(Ok, Maybe I should have asked this one first) do I really Need CO2 Tube? I feel like a classical laser diode would be so much cheaper and safer regarding the overall build, but I guess 20W or 40W laser diodes don't exist. :/

(Also, pic is what i'd like, a laser diode machine, not a CO2 laser tube one.)

>>1166158
Student don't usually own a machine because 1. expensive 2. lots of time to set up properly, if you think your model will outweigh the cons then do it but 99.999% it is not worth the time unless your design is also amazing.

Power level are often achieved by trial and error which is part of the set up process. You put different stuff to test the levels.

Safety is not an issue if you buy the machine, it comes with cover. Wear a goggle if you are too scared.

Lens I don't know, if it is a focus thing then it is usually just turning a knob, or setting distances.

If CO2 tube is what people use then yeah. I mean, you are not reinventing the wheel here, just buy a machine and read the instructions.

As architecture student I don't imagine you have nearly enough time for all this dicking around but that is another topic.

If you really spend the time and money, people who did this usually also run a small business and sell your service to other students to make the most out of it. Your own project is not going to have enough jobs for the machine.

The picture is not the actual armor .

Look for her dress sizes

>>1165203
Steal a pair of her underwear and mail it to me, I'll have your results in a week.

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>>1164832
>putting hardwood over linoleum tile

It's shit wood breh

>>1164832
>pallet wood floor
>wood over linoleum tile
>no router ever touched the wood
>liquid nails

[image of 'projectile vomit' removed at request of viewers]

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Also I'm the guy asking for advice for lifting a stuck bearing several days ago, and I got it out eventually. Thanks /diy/

Gorilla glue

>>1171234
y u no superglue

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>>1171184
What's stopping the flame from burning where the air and the alcohol meet instead of in the foundary?

Also seems dangerous unless you have a check valve preventing the flame from going into your tank of alcohol

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>>1171184
My waste oil burner is like that.

You want to slope the air pipe downwards a bit, so if oil leaks it goes into the furnace - rather than down the blower.

>>1171187
the air is gonna be traveling very fast, but I mean the alcohol can directly feed into the chamber rather than the pipe

>>1171191
thanks dud

>>1171101
Just refurbish part of the place, then move into the refurbished part, then you will have a fun /diy/ project for years

>accept or no
Why not?

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>>1171112

Parts of the exterior plaster fall down every now and then. I don't think that this will get any better in the near future. And if I want to fix that, I do need to let this get verified by experts from the city council. I'm sure they want to check the whole thing in that case.

Fuck no. Sell it ASAP to another sucker who has the necessary capital to deal with city council shit. Literal fucking money pit. Maybe turn it into a b&b if the location is good? Also 10 million at least.

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The wife and I have 2 shitholes and i fucking hate it. Wanna sell and move. Either rent this place or god willing buy it. At any rate if it doean't have PEX it will have. As you can see the house gets shaken baby syndrome when we blast.

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Fucking hell. First order of business is broadcasting wifi in this bitch. Fucking hell for 4g...

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"Goin for a swim."

>NB4 tires or differentials are kill.

I keeo my pit spotless and i gotta watter the road somehow. DIY a watter truck next week. Yall are gonna die laughing.

>>1170765
something is cockeyed

make sure the shafts are straight and parallel and the cogs are in line with each other

>>1170775
This
Rollers have to be 100% parallel or belt will walk off.
Not 99%
Not 99.95%
Adding a lip will just shred or bunch-up the belt.

>>1170775
>>1170825
should the belt be slightly larger then the rollers or should it be a snug fit?

this feels wrong

>>1170495
back scratchers

>>1170495
Jurassic World 2 props.

>>1170495
Footloose.

Lost

There's really no reason to look beyond the Bernzomatic TS8000. I got one this year and was kicking myself for dealing with a cheapo without a regulator for so long.

>>1170537
yeah get the adjustable one

>one button piezo click ignition so no fucking around with strikers
>adjustable gas

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>>1170537
Came here to say this. TS8000 has a larger flame than most blowtorches which means it will heat up stuff faster saving you time and gas. It can connect to propane or MAP gas bottles (which burn even hotter than propane.) MAP can be used for brazing aluminum so if you don't have access to a TIG welding machine then you can still weld aluminum. For example I have an aluminum jon boat. When a rivet leaks I use my TS8000 with MAP gas to heat the area up to 700 degrees. Then I use an aluminum brazing rod to melt some aluminum around rivet. It's a literal weld once cooled and it never leaks again. TS8000 ftw

>>1170279
You're fulla shit; they warn you in the directions that the clock's ticking when you uncork the bottles. A year's being really optimistic with Oomoo; 6 months is realistic. Smooth on does sell trials of mold max, but you need to use a vacuum degasser for that stuff.

>>1170366
Alright, how about the second question then: Is there anything in comparable price and quality that I can use instead? The next-priced things I can find either need vacuum degassers or are 2-3x the cost per weight.

Silicone + cornflour

>>1170213
UV fly killer lamps, fly strips?
they the classic solutions for a reason, they tend to at least half work - don't hang them where the customers can see the tho - and if you think that's self-evident advice, you've never been in a cafe/restaurant in Spain/Greece/etc.

>>1170213
Uv fly killers im thr kitchen

Hang fly bags around your dumpsters , grease clean out, and back door.

>>1170213
Ziplock bag full of water witj a peny in it. No earthly idea how or why this works but it does. Most all flypaper sucks dick.

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>>1169862

Those kind of look cheap. I'm experimenting with 3D printed neon signs. Those "leafs" could easily be printed and back illuminated with WS2812bs.

>>1169862
diffused acrylic and leds, simple shit. the shopping cart guy could help you out here

>>1169906
Have fun with the software side of things.