Archived threads in /diy/ - Do It yourself - 740. page

>>891543

anyone have experience using photo Interrupters?

how accurate could this one be if i was to program a microcontroller to count the interrupts to determine a motor's position?

https://www.sparkfun.com/products/9299

What happened to our OP?
We used to have a pastebin.

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>>891543
I am trying to compile a shopping cart of components for the matchless metal detector found here: http://www.geotech1.com/pages/metdet/projects/matchless/matchless150c.pdf

Can someone look over it and let me know if it looks good? I wasn't too sure about the following:

14 pin DIL IC socket (I could only find exact on ebay for ~$17)
ICM7556IPD (Ebay)
BC549C(Again, could only find on ebay)
.01uf ceramic disc (listed as 50v, will this work?)
500ohm pot in place of 470ohm

Couldn't find:
.001uf resistor polystrene (Does it have to be poly?)

I forgot:
A switch

My cart contains a CMOS 1555 and a 14 PIN IC Socket which I thought might work instead, truthfully I have no idea what I am doing. Do I need the components from ebay? Are there any US based companies anyone knows that stock these?

I did some electronics work back in highschool and I am fairly confident I can limp through online schematics enough to enjoy some things I can build that may be out of my price range on my salary. I am willing to learn, any suggestions helpful.

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A picture of the fuse box I want to mount.

>>889798
IMO easiest way to achieve the spinning head would be to mount the motor on top of a hat or helmet, and have the robot head be attached to the motor and not attached anywhere else on the costume.

>>889800
That's a pretty good idea. I can mount the electronics, including the motor, on top of a helmet. How much motor, and how much battery would you think is required? I was initially thinking of wiring 2 big 6 volt lantern batteries to make 12 volts that would last all night. I was thinking mount the batteries in the chest and run a pair of wires up the back of the neck to the helmet. I was thinking of a motor like
http://www.digikey.com/product-detail/en/324/1528-1062-ND/5022791

Does this seem like enough?

yeah, Aluminum over heats too quick. Keep a rotation of practice pieces going so you do not keep practicing with a too hot piece and you get a different weld each time

I'm currently trying to walk the cup and its a bitch

patience... seriously.

Rotate between 3-5 pieces you have set up. If your instructor says anything... explain why. You will actually spend more time welding rotating pieces than to stop and let shit cool.

When you get fucking pissed...which I am sure you will; take a break. Smoke, get a drink, do push ups.

If you are doing fine precision work avoid stimulants....like coffee.

Smile.Take you licks and fuck ups in stride and bury them.

>sensationalist news articles about the
stop right there. nobody in the news is going to know or care what that circuit board is or does. I think the closest historical analogy is GPS units which what, get banned in 3rd world countries worried about spying? another similar situation is lab glassware: there are a few unenforced restrictions but it's trivially easy to buy whatever online.

The Pi isn't suited to any of those tasked you described. However what it is good for is attacking wireless networks. Get a small container, add a PI and a battery and you have a mobile hacking machine that costs less than $50. Produce a ton of them and drop them all around the target you want to hack. Government has already explored this and as such they're invested in it. They won't place a ban.

>>886628
let us not forget clockmed. "misunderstood genius" will come to mind. although if they are discovering rpis then I assume that they will go off as successfully as the unabombers many shitty bombs that never did anything or only took a few fingers.

>>886449
http://www.kb6nu.com/wp-content/uploads/2015/03/2014-no-nonsense-tech-study-guide-v20.pdf

Read for six days, and on the seventh take the quiz.

why do hams get so buttblasted when i fart and burp into my baofang handheld transmitter during their sunday meetups.

Bonus- is there any group of hobbyists more autistic than hams?

>>886467
4chaners. Read yr post, it should be pretty obvious why....if I was trying to talk to someone and kept getting cut out by some dumb shit....

keep doing it though, fcc might come to your birthday party. I've been listening to hams look for a couple of guys around my city, got a couple last year, turned them over to the fcc.

Problem with your idea is it will not pass inspection

>>886444
don't they make int/exh combo tubes?

>>886444
what inspection?

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>>886289
gonna selflishly bump with a few morrowind pics

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>>886291
c'mon guise


just a little pointers would be appreciated, porb one bump after this then i'll just give up and go to home depot

Cut hole.
Cut drywall same size as hole.
Tape, mud, sand.
Paint when dry and flat.
Watch paint dry.
done.

https://lmddgtfy.net/?q=arduino%20sample%20code%20for%20a%20light%20switch

Try Github?

>>886138
>>>/g/ read the sticky

/diy/ is full of retards that can't help you

cutoff wheel on an angle grinder

>>886063
/thread

With a hacksaw.

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also this I think it might be important

Probably the easiest thing would be to just cut the wire off the charger and solder it to a male usb to make a cord.

>>885812
Charger is 5.2v, usb is 5v
Should be no problem with just cutting the lines and splicing them together

>>885770
What the fuck is hween.

>>885771
Halloween
how do you not understand that?

>>885771
>hween costume

its a horse costume.

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Here's a pic of the nut

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Take the nut up to your local hardware store and grab a matching size locknut
They have a little insert that grips on the shaft to prevent it from backing off

>>885590
Are the threads undamaged on the nut and the bolt? If they're not, replace or repair the threads.

Alternatively, get a lock nut, or pour locktite all over your nut. Not sure how long that last solution will last.

>>885534
yes they can

general advice: wear safety

>>885534
grinder brushes are for removing stuff from metal. they will damage wood. (you may *want* that damage for a weathering effect, but anyway)

the normal way that you strip latex paint from wood is with a heat gun. you heat the paint up a couple hundred degrees (until it begins to form small bubbles on its own) and it softens enough that you can just scrape it off without any chemicals

>>885534

You're better off using a heat gun and sand paper.

Wire brushes would scar the wood a piece of piss.

>>885378
Works on wood.
http://youtu.be/-nPU_91xFwk

>>885378
>>885379
More.
http://www.instructables.com/id/Solvent-Transfers/

>>885379
thanks! I'll pick some up and try on some scrap wood first

Have you figured the cost of materials?

>>885325
Material supplied.
Only interested in fab costs.

>>885320
3 hours

>>885328
add 1 hours for not letting me bend you over on material