Archived threads in /diy/ - Do It yourself - 573. page

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>>969124
try that again

whether, and yes

>>969128
yes I am being too picky, or yes I should grade it?

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I have never seen one that is thru-hole/board mount (like OP pic) that had more than 24 pulses. They wear out relatively quickly too, and don't move smooth because they have detents in them.

There are rotary encoders pretty cheap on the China sites. Looking fast I didn't find any with 128 steps per turn, most are 100, 200, 400 or 600 steps.
If you got a 400-step one then you could just use 3 pulses of the encoder as one 'actual' pulse, that would take 384 pulses on the encoder--which is pretty close to one actual turn.

Do note: the types of encoders pictured don't have detents, so they turn totally smooth.
And they don't have end stops either--they spin round and round.
They output 2-phase gray code and it is easiest (IMO) to just put a arduino (any 16mhz) on there to monitor the two encoder lines and put out the digital value on other pins. This is cheap and you can DIY it easily.

If you want an absolute optical encoder--one that *never* loses tracking and puts out a digital signal already--they cost a LOT of money. Figure $400-$500 at least, for just a 128-pulse unit. Absolute optical encoders are industrial-level gizmos with industrial-level prices; there are no cheap ones anywhere.

>>968941
>Figure $400-$500 at least, for just a 128-pulse unit.
Okay,,, I was a bit high in that estimate.
Here is an Omron-brand 256-pulse absolute encoder at Mouser for "only" $301
http://www.mouser.com/ProductDetail/Omron-Automation-and-Safety/E6CP-AG3C-256-2M/?qs=TwPrcXezm71FKQKJ%252bh0w3g%3D%3D

Omron makes a lot of different rotary encoders, but (looking on their website) the 256-pulse one is the lowest-pulse-count absolute one they appear to make.

A $12 China encoder and a $2 arduino pro is still way cheaper than $300, and can do -almost- the same thing.... The main advantage that an absolute encoder has is that it doesn't lose its position when powered down.

>>968898
You can have 128 positions or any other arbitrary number using a 24 step per rotation rotary encoder. A rotary encoder turns continuously and you keep track of position in code. You can count as high as you like before rolling over. You'll have to do multiple full rotations to go from 0-127, but that's fine if you show the number on something like an LCD display instead of printed on the panel behind the knob.

>>968716
So without ANY kind of support under it? You will have to hang it from the wall or from the ceiling. Particle board will sag like a motherfucker under its own weight without support, let along with whatever will be on your desk. Even plywood or real wood will do the same with time and weight.

I wouldn't exactly call particle board a slab of wood, but....

you're pretty much going to have to have some kind of support to keep it up....keep it mind it doesn't have to be much, and it doesn't mean you'd have to put posts down to the floor

there are plenty of designs for simple brackets with 2x4s, or you could just use metal shelf ones

>>968716
Add square metal brackets to each side using screws and glue to prevent to board from sagging. Screw the board down.

Should be fine.

>>968493
what is the point of this thread?

>>968494
woodworking?

>>969289
that is the point of this thread?

>>967896
Lightning is a bitch.
As far as troubleshooting goes, just measure everything that you can.
Start with the diodes, move up to transistors.
The ICs are very likely shot.

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These are called varistors.
They are usually connected directly at the mains.
Some times in series with a shunt resistor. When high transients occur, it will route it back, so your circuits are safe.

When the transients have more energy than usual, the varistor will break.
And most of the time if it breaks it will stay shorted.

Measure the resistance across the varistor.
If it is low (5k is still low) it has blown. Desolder the varistor and measure the resistance again. If the resistance is high, you are safe to plug your circuit in the mains and check if it works.

When you measure, remember to check the polarity of you measurements. The diode rectifier may lead you to believe the varistor is broken while it is perfectly fine.

Your circuit will work fine without the varistors.
But if you have a transient again, Everything will break. They cost about 50 cents,
So just replace it.

>>967903
Don't confuse the varistor (connected in parallel with the mains) with an inrush current limiting device like a NTC thermistor which will be connected in series with the mains and should have a relatively low resistance (like 5 ohms). They are in very similar packages.

Usually copper is pretty solid and stands the test of time. What do you mean by damaged? Just a section or the whole pipe its self? Need more specifics. Also yes, pex does require special tools to make the fitting connections.

>>967212
pex is also much more expensive than copper. and it will break down with exposure to the sunlight. it has its place. and its easier to use if you can buy fittings in bulk and need to thread a pipe through a wall. copper works well though.

if you just have some pinhole leaks just buy a new section of copper pipe and solder it in.

The original installer probably used copper for a reason, you better make sure pex will hold up under the conditions

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>>966772
you need to say what country you are in, different countries have different laws about owning and operating gas welding equipment

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>>966799
Right, sorry about that.

Good ole America! Where the eagles fly free and the burgers are juicy.

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>>966830
i also would have accepted "Where the burgers fly free and the eagles are juicy."

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>>966512
Here, ik its a shit picture, all I have for a camera is a $60 nokia phone.

>>966512
citric acid in warm water

leave in for 2 days

>>966518
this will... do what exactly? will it help the wood, the metal, or both? also how long will it stay fixed? I already tried scrubbing the metal, but as soon as it dries it just goes back to looking like this, Except with fingerprints and watermarks

and how do I keep the water warm for two days straight?

OP here

I think that if you somehow managed to make a cilindrical ingot of copper, you could make a rock anvil, scratch a straight shallow line, and hammer the ingot down into that line, until the wire traps inside

>>965599
>>965599
couldnt you just scratch a channel in some rock and pour the copper in it? it would be thick guage but it would "wire"

one day Primitive Technology will make copper wire and build an generator to produce electricity and then build e-Motors and power tools

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>>965503

My question; what’s the boxy machine in between the radial arm drill, the suspended cauldron and the bridgeport; a planer or a sheet metal brake or what?

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>>965505

>>965505
seems like a brake

Spinner for maximum pleb

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just make a little one of these

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Make this.

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>Power buffer
i've spent my whole adult life fucking about with with nylon and wire brushes, polishing cloths and nasty rubs and noxious liquid polishes. busting my knuckles and ballsack and still ending-up with sub-par work.

finally spent $50 on a HF buffer/stand and don't i feel like a dumbass. i love it <3

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Bandsaw

>>967052
Not bad, but it's no Dewalt™ brand Dewalt™

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Still looking at heatsinks for the cpu, so far it looks like I can save around 10 dollars by ordering from China

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http://pages.ebay.com/link/?nav=item.view&id=221809121186&alt=web

That's the pump. Going to hook it up to the computer psu.
A little more than $3 but whatever.

Overall it should cost around 20 dollars, including the hoses, since I have a mate who does water filters and shit who's willing to help me out with that.

>>970820
You do realize that this is bound to leak everywhere, right?

>>965132
If you don't know what hard water is or haven't noticed weird things like white residue all over your laundry or how you can never get your car clean because the water itself leaves stains that are almost impossible to remove when dry then yes.

>>965132
They do work. Depends on what you are paying for them I guess.

>>965132
Ever see someone jump off a bridge or something and hit the water hard? Always happens in natural bodies of water like lakes.
Water softening is used in community pools where diving boards are involved.