Archived threads in /diy/ - Do It yourself - 417. page

>>1043705
Smh. 4got link. http://m.ebay.com/itm/50PCS-5800mAh-Li-ion-18650-3-7V-Rechargeable-Battery-For-Flashlight-From-USA-/111849969876?nav=SEARCH

Looks pretty good for a power cell, transformer could give it many uses

File: FSNBWHIHAQ2TMS2.MEDIUM.jpg (75KB, 620x620px) Image search: [Google]

75KB, 620x620px

King of random spot welder.

Mine will be similar but not as fancy.

Probably run a foot switch for power and 2 hands use for build packs.

Anyone ever build there own packs?

Pic related.


https://youtu.be/vrlvqib94xQ

im thinkin they go to those fancy gold pads commin out of the wires

g
vcc
clk
spd
5/5?
I?

>>1043570
I should clarify that the pic is not mine

File: BLDCControl[1].gif (39KB, 720x386px) Image search: [Google]

39KB, 720x386px

The six wires probably are for controle the chip LB11917 (I just found the datasheet for the LB11920 -- PWM drive motor three-phase).
So these wires are for control the IC that drives the motor.

These motor can have two configuration.
Three coils and common or only three coils.
You can spin using PWM in each coil with delay between phases. It's very hard to do, because you need a closed-loop controller since it can lost the synchronization very easy in open-loop.

So I recommend you search about that LB119XX and figure out how to use it.

>>1042998
clean it up and look for damage, replace dead parts etc, et voila.

>>1043020
Also power it up carefully instead of just plugging it in.

>>1043026

I already did, I get no filaments and the power transformer just buzzes loudly I suspect a short so only had it powered on for a few seconds

>>1042817
neat

>>1042817
Pretty cool

I'll try it with an old burnt out bulb

i made an oil lamp with one of those old bulbs

>>1042656
Look on Craigslist for general labor construction jobs. When the boss sees that your a worker and smart to boot, he'll give you more challenging things to do. After a couple years of experience switch to a better paying company, or go it alone.


I work in construction, I don't really like truss day, but I hate laying tile or block.
Framing and sheathing are my favorite part. It goes relatively quickly and at the end of the day it looks like a lot of work done.

Learn spanish.

Labour under a carpenter and work from their, take an apprenticeship and do diy projects on the side

>>1042636
Garden's it leeches the chemicals. Okay for flowers. I suppose Okay for veggies but it will have trace amounts.

New treated stuff doesn't use arsenic any more. So you just gotta research the new chemicles used to see what else they are used in.

Tables are fine. As long as you aren't eating the tables.

Walking on is because of splinters.. But yeah.

pretty sure green has arsenic in it. don't inhale when cutting

>>1042641
The "new", safer, arsenic-free stuff is greener than CCA. The color comes from the higher amounts of copper in the preservative.

>>1042488
Just use any tar or pitch, nobody would be able to get it off without getting they're hands really messy

>>1042488
You could put a dollop of silicone on the back of it. You'd have to stick it to something within a couple minutes, but it will stick to just about anything and dry in ~20 minutes and become very difficult to remove. There is also a quickset silicone that comes in little tubes, it is insanely strong and dries in seconds.

>>1042488

I've designed a few amplifiers, effect pedals, and power supplies, semi-"from scratch," but I sure as hell don't use any calculus. The only math I do is some simple back-of-the-envelope stuff before i throw something into SPICE. Learning how to do real EE math would probably help me put together higher order filters much faster than the roundabout trial-and-error method I tend to use, though. I took calc through differential equations in school but that was a while ago and I'm not really sure how to apply it to circuits.

It's very hard these days to come up with an "original" design in the realm of audio amps and effects, so most of the shit i've tried is usually over-convoluted and doesn't end up working as I imagined. Right now I'm trying to figure out how to get a PLL working with a guitar as input for some synth-y sounding and frequency shifting stuff.

>>1041437

File: DSC_0130.jpg (3MB, 3840x2160px) Image search: [Google]

3MB, 3840x2160px

>>1041423
I would say, calculus on the back of an envelope can bring you pretty far in a project.
But for amplifiers, both linear and switching, I would do a bit more calculus, just to ensure losses and gains are correct. But most importantly, the stability when feedback is applied. Here I'm falling a bit short on experience, though.

Was it just linear power supplies?
I have done a few switching supplies already, some more well designed than others..

I'm actually going to study the PLL my self. Need it at my job and for a spare time project with my old supervisor. They are pretty cool.

I would say it is easy to come up with new designs, but not new topologies.

What are the power ratings of your amplifiers?

2/3 of philips screwdrivers fit 2/3 philips screws if you dont give a fuck - most people don't.
1 size torx screwdriver fits 2 sizes of torx screws if you wiggle it, 3 if you have a hammer.
Torx drivers cost more and you need a lot more of them.
Majority will go with the cheaper option.
I have full sets of each and only get annoyed when im handed the aftermath of someone trying to remove a torx with a philips.

>>1041022
I'd rather try to remove a rusty Phillips then a rusty Torx any day.

Hate these. Break their heads all the fucking time!

File: 1360596279344.jpg (37KB, 1280x720px) Image search: [Google]

37KB, 1280x720px

But, why?

>>1040817
because im on 4chan at 2am
At only a couple bucks for stain and sealer and blades, with free wood in the forest, it's a lot cheaper than heroin.

>>1040795
I don't, but I'm sure somebody will like what you have made. Post some pictures on a Harry Potter forum, try Etsy too. You mkight be able to sell some for a bit of cash.

I would probably sand them down a little more to make them a tad smoother, make them a little less rustic. But, I can see why you would leave them like that, it does fit a wands 'style'.

I like the hollowed out parts of the wands. How did you do them?

File: IMG_20160810_180942734_HDR[1].jpg (3MB, 4320x2432px) Image search: [Google]

3MB, 4320x2432px

This one is a toolbox I threw together to keep in the back of my shitbox Honda for the next time it breaks down.

Interesting thread.

Keep it alive, next week i am home again and will contribute then!

File: image.jpg (2MB, 4032x3024px) Image search: [Google]

2MB, 4032x3024px

Which one?

does it need the square holes?

otherwise buy a bowl and grill the little holes

>>1045068
Yeah it does

>>1045069
Look here, explain yourself.
Why do the fucking holes need to be square?

What is your end goal? /diy can't help if you don't explain.

Is this even considered diy?

I didn't want to use reddit pls hlp

>>1044631
damn nigga just look on craigslist
anything that gets hot will work
$800 is way too much i found a kiln for $100 and melted shit in it

>>1044364
Can you just safety pin it to the back? Like 3 pins would do.. But this would poke holes in the whole thing.

>>1044371
I suppose that's possible, was really hoping for something that would not damage it. Or If I AM goiing to damage it, being able to easily undo and redo it would be ideal, on the off chance I decide it's in my benefit to wear a hood. (Like perhaps a button on the back of the hood and the back of the jacket. )

>>1044374
Tape it down when you fold it inside, maybe that'll work.

>>1044297
it can be alright. see how much current it draws at 14.5V (the voltage supplied by the alternator when it's running). if you can keep it cool at that level you should be ok.

>>1044297
>automotive application

Looks like it is designed for 12 Volt use. Previous post mentioned checking it at 14.5 V, but odds are it will be OK.

The lighting pattern will dictate its use. This will probably be OK for a dome light or other interior use. Probably not designed for external lighting.

LEDs need a resistor to limit the current. This one has one built in and will work straight off of your automotive supply.
>>1044308
I'm not sure where you get 14.5 from, most cars are different and for almost any situation that difference is irrelevant.