/diy/ - Do It Yourself

>>123821
Unfortunately I can't really help you there. My experience is mostly limited to joining steel to steel. I'm not sure that it's possible with a MIG, though I'm sure brazing/soldering would work.

Welder here.

Aluminium being 'unweldable' is a load of bullshit. It's certainly a lot more difficult than steel to weld, but far from impossible. Certain types of welder aren't very good at welding it (arc, DC TIG, gasless MIG), but the rest are fine (AC TIG, MIG with gas).

You also cannot use steel MIG wire to weld aluminium.

They can be very simple. The one I pulled apart had an electromagnet connected to the AC power, and a permanent magnet on the end of a lever. As the AC power oscillates, the changing magnetic field from the electromagnet attracts and repels the permanent magnet, moving the lever back and forth.

There's a small rubber bladder under the lever which is compressed and expanded as the lever moves. A pair of one-way valves ensure that air is sucked into the intake and blown out the exhaust.

I've seen a few videos on youtube about knife making. Basically, you cut out the profile of the knife (i.e. the side view), then shape the sides however you want, then make the grind (the angled part that goes from the full thickness of the blade down to the cutting edge). Then you just need to harden and temper it, then shapen and add a handle and your'e done!

I haven't built an arcade stick, but I did use a keyboard encoder for another project. It's called the 'I-PAC' from Ultimarc. http://www.ultimarc.com/ipac1.html

They seem to have a lot of arcade stuff. Good luck!

I don't think you understand what a generator is. It's just a device that uses magnets (how do they work) and wire to convert mechanical energy into electrical energy. There's no 'boosting' happening.

>Ide
*I'd

It's probably just got a potentiometer in the pedal. If that's the case, it would be trivial to duplicate. I don't suppose you can get a hold of a pedal for testing?

>>103195
...or a gear/pulley reduction.

Most electric motors will rotate too quickly to be useful.

>>97910
The flyboard is similar, but not what is pictured. The picture is a JetLev. Pressure isn't really a problem - check out the flyboard. They just bolt a hose to the back of a jet ski. The difficult parts are the hose and the gymbals.

>>97903
Tree fiddy.

Probably around $15,000

>>97844
How discerning does your coin mech need to be?
If you just want something simple, a leaf switch behind a slot will count coins.

I can't believe no-one has suggested a vaporizer.

>>81524
Sorry it took me so long to get back to you. To a computer, an I-PAC is indistinguishable from a USB keyboard (or PS/2 if your laptop has a PS/2 port).

You just need to wire up your buttons (any normally open buttons/switches will work), then program the key assignments into the I-PAC with the software they give you.

Unlike some other keyboard encoders, the I-PAC stores its configuration onboard, so once it's been programmed, you can move it to any other computer and it will work as soon as you plug it in.

Hey OP, I don't know if you're still here, but if you are you might want to consider the I-Pac. It's meant for DIY arcade machines, but basically it's just a USB (or PS/2) keyboard encoder. It's a lot simpler than dealing with an arduino.

http://www.ultimarc.com/ipac1.html

I used some in some driving rigs that I built a while ago and they've been working flawlessly for years.

>>79541
>Do you know a way to cool down the temperature of a room which is like 10m2?
Get a portable air conditioner. They're priced quite reasonably.

>>78267
miNecraft

Miecraft.

>68ohm transistors.
I think you mean 'resistors'. I'm not trying to be a dick, I just want to make your life easier if you need to find information on them or order more.

>How on Earth do I drill a hole in the battery plate?
Ideally you'd need a small drill bit and a drill, but for something this small you can probably just punch a hole in it with a nail. That metal is pretty thin.

>>77455
It's cool man. 4chan is usually pretty hostile, so it's understandable that you interpreted it that way.

Good luck with your project!

>>77443
I wasn't trying to be critical - I was trying to be helpful/encouraging :(
You said it was going in your bedroom right? You could make it into a badass HTPC.

>1. The fans mount directly to the wood through wholes cut into it, using a case would be fucking stupid.
What I meant was that you could put the components from a computer inside your box, with your box being the computer case.

>2. The weight would be stupid.
The majority of the weight will be the MDF. That stuff isn't light.

>3. The cost would make it unfeasable.
You don't have to use new components. Even older machines work fine as home theater PCs.

>4. The size would make it unfeasable.
The only issue would be the 20cm depth, but as long as you mount optical drives vertically instead of horizontally, this would be fine.

What about putting a computer in the box?

OP, are you still here?

This idea is quite feasible.
- Line the entire inside with soundproofing foam. It absorbs sound, and is also soft. I can't speak to the acoustics of a box, but lining it with soundproofing material is a very good start.
- Put the computer on the outside and just have a monitor/keyboard inside. This will reduce heat.
- Run the ventilation constantly. Carbon dioxide can build up in a small space, and that shit will make you pass out and then die. We don't want that.

There are all kinds of audio tranmitters available. If you can, go digital - analog is prone to interference.