can someone please explain to me how these things actually work? all the instructions i've found online so far have just left me with more questions than answers
the arduino libraries allow you to daisy-chain them together and address each one individually. how is that possible? from what i understand so far, the only control signal they accept is a 24-bit RGB value. there's no back and forth communication with the microcontroller. each one has only one input and output, so how can they be individually controlled if all they do is accept a value and then hand it to the next LED?
>>939613
If you check the datasheet for the ws2811 ic that is used you see that you send three bytes and that sets the first pixel. The next three bytes the first pixel is already set so it sends them to the next in line.
A reset resets everything.
At first I thought it was just a shift register type deal but the datasheet is such shit engrish its one way or the other.
So not exactly addressable, you have to throw everything out and reprogram all of them to change one led
>>939613
>address each one individually.
Simple. You send a string of 24 bit values to te first LED input. Each 24 bit 'word' is 8 bits each of RGB values. The first LED picks the first 24 bits off the string and sends the rest to the daisychained LEDs. Each one picks 24 bits off and sents the rest on.
So you can set each LED to a unique RGB value. You cannot send a single RGB value down the string addrressed to one LED in the middle. You have to pack the string with at least the RGB values for all the LEDs ahead of the one you want to change.
>>939625
>>939627
thanks for the responses, it makes a lot more sense to me now.
so if i'm interpreting this correctly, each LED has a 24 bit input buffer that retains its contents temporarily so long as it's receiving a data/clock signal. once the buffer is full, the overflow gets passed to the output until the signal stops, then the buffer automatically clears after a specified period
for example if you had three leds you wanted to first make red, green, and blue, then change to cyan, yellow, and magenta, you would have your microcontroller simply tap out
FF0000 00FF00 0000FF
then wait at least 50us and tap out
00FFFF FFFF00 FF00FF
and after another 50us the LEDs remain lit, but their input buffers will be cleared and ready to be refreshed
this is actually such a simple and elegant solution. i wish i got to design things like this
Got any ideas on how to make this? I'm thinking angle irons and pallet wood. There are benefits I see for this and sex plus just being lazy. But I like this. What ideas do you have for this when making it to make the process cheaper and easier?
Hi /diy/
I'm building my own cockpit (pic is something similar, not the actual one I'm builidng).
I'm getting to the stage where I'm thinking about making it look the part. Any recommendations on best ways of painting/vinyl wrap/finishing?
>>939256
Yeah, you dip the brush in the paint first.
Where do the birds fight?
>>939264
How the fuck is he going to dip the brush in the paint if he doesn't first open the paint bucket?
Illegal in Europe?
https://www.youtube.com/watch?v=VU0vuw58Adc
Why.jpg
Not illegal. Saws just have very small arbors so as to discourage their use.
Motor brakes cannot stop that much mass in a timely manner and blade guards don't work with them, so Eurocrats did what they do best.
Probably the same reason guns are illegal.
>the government thinks you're fragile little pansies that can't take care of yourselves
>liberals
>>938798
the regulations have specified that spinning blades must come to a full and complete stop within 10 seconds of the power to the blade being shut off if the blade is readily accessible to the operator's body.
Large fab shops and equipment used industrially have retractable blade guards, or heavier duty engine brakes to comply with the regulations.
Any one got a good way to make a cb radio mobile? Pic unrelated
Attach it to your truck?
AFAIK the power requirements are to high the only portable radios I've seen using CB have been shorter range than a home or truck setup....
>>937927
are you wanting to make a man pack? or a go box? or put it in vehicle? or??????????
>>937996
In other words how many batteries are you willing to carry?
If you had to limit yourself to only two power tools, which tools would they be?
A drill and a circular saw.
Those are basically all I used, + a tape measure+hammer+pencil to build 99% of a really noice shed.
>>932393
Grinder and corded power drill.
>>932393
Fuck. I'd have to go with two combo machines. A DeWalt radial arm saw and a Shopsmith probably. Not ideal machines and you have to re-zero them every time you switch up what you are doing but they can literally do everything. I can't think of a single operating in the shop they can't handle.
For around the house tasks I generally use hand tools because I fucking hate battery operated tools.
Hello there, diy. So I'm going to buy a gun and there in Europe we have to have a safe for storing it. Problem is that the price for a gun safe starts at 200 euros for a simple one, so I want to try to build it myself. I have a MIG welder so I think I could build it by myself for ~50 euros. The requirements for self-built gun safes are:
-everything is made of at least 3mm steel
-lock is hidden behind doors (no padlocks)
-hinges is also hidden to avoid easy access to breaking them
The only problem which I can't solve is hinges. How do I hide them without making a gap between a door and a frame? If I won't leave a gap then the steel of door will lean against a frame and the door won't open.
Is there some kind of special hinges to do the job?
Any other thoughts?
>>938909
kitchen cupboard door hinges
I don't think it would pass the inspection. Too "light duty" I believe.
Check how the commercial safes are made and copy the idea?
Does anybody know what this is and what it may do? I'm afraid to switch it.
>>938615
>posting a 3.5 meg fucking picture of this
>>938618
It's almost as dumb as your comment.
>>938615
It turns on the gas burner
Do I really need a college or university course to learn how to solder? I'd like to learn and become proficient and do repairs in the future. But holy tits even the bottom of the barrel shitty college courses here are $10,000 for a 2 year courses. That's a ridiculous amount of money to throw out without a guarantee that I'll make it back quickly. It's not really an option anyway as my credit is shit since I have a few things in collections. (Fun fact the last time I went to school for something they let me in the course before my student loan was completed and I ended up with 8,000 dollars in debt that never went on a loan)
So the bottom line is, I want to learn. Are there free online resources that can help me build my skills without sinking money into colleges, or perhaps alternative more reasonable courses?
1. Purchase a soldering iron + solder.
2. Find some junk electronics to practice soldering on.
3. ???
4. Profit!
You really don't need a college course to learn to solder.
>>937960
To learn to solder? God no.
To learn to repair computers, unless you're about to spend a ton of money on stuff to practice on, yeah.
Here at my work we manufacture pcb's. We can typically teach some one off the street to solder well in two weeks or less.
But to understand the "why's & how's" I would recommend going to school.
Furniture Thread: Post Yours and answer questions
A Pair of Deacons Benches in Yellow Cedar
Another view further along. The 16 panels are glued and cut but need a routered profile
A steel coffee table I'm in the process of making.
When it's done it will be powder coated black, have chrome feet and a 10mm thick glass surface.
Trained electrician here starting an electric problem thread
>>936069
What is that contactor for? Also have some questions in a few minutes... Taking pics
Why?
>>936069
How do you waterproof a mains socket that i want to tail out into my garden for a lamp?
I'm thinking of putting a 33cc chainsaw engine on a bike with a torque clutch and a number 14 tractor chain. This will be my first time doing something like this.Does anyone have any tips or tricks ? Feel free to brag about stuff you have built.
If you use a chain and sprocket you'll need a huge sprocket on the wheel. Just use friction drive on the tire like the picture.
>>937910
Thanks looks like I need to make a trip towards harbor freight or a tractor shop.
>>937905
>Does anyone have any tips or tricks ?
Carry a fire extinguisher.
Hi so i got a paintball co2 bottle like this
9 once and when its full of co2 i would like to know the pressure its held.
any here can help ?
Seriously?
it's around 3-4000 psi but if you absolutely must know just put a gauge on it..
>>938662
Thats the output pressure from the regulator.
What is your honest opinion of Jimmy Diresta?
>>932454
Jimmy, stop posting this thread, you are annoying
>>932454
Do I need to have an opinion of him? The guy could be a fucking cuckold but it doesn't really matter because it's not his personal life that he broadcasts.
Go back to /b/
He's clever, should weld more.
Uses band saws incorrectly sometimes. But he's good at what he does.
So I have about 40 rolls of this stuff but buying 40 cases for it is too expensive. I looked to see if anyone had ever done a diy to store and despense these but came up with nothing. I'm wondering if anyone has an ideas of a diy way to store and make them easier to despense.
>>938361
Buy 1 case and reuse it?
I don't know the exact sizes of that thing, but perhaps 2 Pringles can lids around the spools with a pencil/pen through center would work?
>>938361
it's already in a dispenser, isn't it?
They are thin so get a empty tape dispenser and u can put 10 or about rolls on one and have the tape on the edge easy to rip.