diy - DIY & Electronics

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File: 1436094734670.jpg (348.69 KB, 1920x1185, mech15.jpg) ImgOps Exif iqdb

Anonymous 2015-07-05 11:12:14 No.821 [Reply]

Got a bit of a question for anyone who knows a bit about robotics.

Most actuators work with gears for changing speeds and torque, right?
But the problem for me here is that gearing only provides discrete values while for my project I need something that can cover a whole lot more.

Are there any actuators that allow me to specify a given torque/speed and then have it run as such without relying on gears?

Anonymous 2015-07-05 11:43:24 No.822

Really I should specifiy that I need an actuator that can provide a specified amount of torque at any given time.

Anonymous 2015-07-05 21:02:08 No.823

Well you can use a simple DC motor, the torque is proportional to the current flowing in the motor.
You can control the current using a motor driver, these are provided by motor manufacturer, some drivers can even be set using some kind of PC interface.
Finally you can control the driver using a MCU, or just an arduino.

Anonymous 2015-07-05 21:11:54 No.824

>>823
Thanks, anon. That should work well enough.

Anonymous 2015-07-17 12:13:52 No.869

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PS1 Anonymous 2015-07-07 14:47:25 No.837 [Reply]

Anyone knows of a good site for PlayStation 1 related resources? I want to know how do modchips work, how can you repair joystick ports on it, the controller itself or other parts.

File: 1425398413149.png (7.96 KB, 125x49, JewTube.png) ImgOps iqdb

youtube proxy - easier than expecte 2015-03-03 16:00:13 No.474 [Reply]

sup i made a thing because youtube the website, youtube the app, and all other android youtube apps suck balls
http://webspekt.de:8567/https://www.youtube.com/watch?v=Uqza3rZxqIs

prerequisites:
vanilla node.js 12 and ./youtube-dl
you can also use the youtube-dl command but you need to change it in the code


var spawn = require('child_process').spawn;
var fs = require("fs");
var serial=0;
var http = require('http');

var server = http.createServer(function (req, res) {
          serial++; 
   var s = serial;

Post too long. Click here to view the full text.

6 posts omitted. Click reply to view.

Anonymous 2015-03-09 21:28:36 No.498

>>497
you used to be able to suffix youtube urls with a format code which would determine the video quality, but they dropped support for that a long time ago.

Anonymous 2015-07-07 04:41:32 No.831

I made a thing using some javascript and youtube embeds. You use it with video/playlist IDs.
http://g4g.x10.mx/yt/yt.html
you can view the js source at http://g4g.x10.mx/yt/yt.js

op Anonymous 2015-07-07 08:22:06 No.833

>>498
youtube-dl has flags to specify quality but i couldnt get them working so i didnt add them

>>831
oh that is very cool! i actually tried feeding youtube playlist entries into my thing but it didnt work (always downloaded the first one or some soykaf) so your thing covers exactly that!

op Anonymous 2015-07-07 08:32:13 No.834

>>831
>so your thing covers exactly that!
well actually not, should look before i post. it's still cool.

there is actually a similar software running on reddit
https://www.reddit.com/r/radd_it/comments/1vjdw9/who_is_uplaylisterbot_and_what_can_it_do/

here is an example to play around with
http://radd.it/r/Cyberpunk/comments/31l9cl/video
it's quite shiny

the idea here was to generate a playlist from a bunch of links so people can watch them hands free

Anonymous 2015-07-07 08:53:28 No.835

File: 1436259208921.png (20.03 KB, 834x499, in_action.png) ImgOps iqdb

>>834
forgot pic

it's pretty clever.

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Anonymous 2014-11-26 14:48:31 No.190 [Reply]

Has anyone here visited Shenzhen? The electronics culture there is strong, since all the factories are there and it's so easy to get parts.

Pic related; it's some guy who manufactures electronics in his own home. http://www.hoektronics.com/2013/01/05/meet-a-shenzhen-maker-mr-chen/

5 posts and 2 image replies omitted. Click reply to view.

Anonymous 2014-12-06 21:40:06 No.219

>>193
I ordered one of those little USB TTL adapters and they sent me a few arduino clones instead. Based chinaman.

Anonymous 2014-12-16 04:44:38 No.232

File: 1418705078665.png (2.13 KB, 139x65, Shenzhen_in_Chinese.png) ImgOps iqdb

Links!

Here's the Shenzhen Map for Makers, pointing out important places in the city for hardware hobbyists:
https://www.seeedstudio.com/blog/2013/09/03/shenzhen-map-for-makers/
(tl;dr take me to the actual map: http://www.seeedstudio.com/document/pdf/Shenzhen%20Map%20for%20Makers.pdf)

HAXLR8R is a startup incubator with a particular focus on hardware based in Shenzhen:

http://www.haxlr8r.com/

Anonymous 2015-06-25 19:02:04 No.794

>>219
Awesome! Any plans for cool projects?

Anonymous 2015-06-26 15:17:37 No.796

I used to know a girl from there.

Anonymous 2015-06-30 23:59:55 No.804

>>213
I'm not the guy you asked but I've had good experiences with aliexpress. It's usually cheaper than ebay, delivery can take a while though...

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DIY mechanical keyboard Anonymous 2015-06-12 10:53:51 No.732 [Reply]

I'm thinking about building a mechanical keyboard; seeing as the nice ones are fairly expensive to buy I figure I might as well go the whole hog and make a project out of it.

Has anyone any experience with a project like this and advice on where I should start?

Anonymous 2015-06-12 11:00:03 No.733

File: 1434106803088.jpg (337.03 KB, 1600x900, 1422127136264-3.jpg) ImgOps Exif iqdb

I always wanted an ergodox, that's what I'd build if I could get the parts.
However what I like is the diy, free firmware and ergonomy.
Are mech keys better for programming (read: a lot of typing) than, say, chiclet keys or a cheap plastic kb?

Anonymous 2015-06-12 11:57:47 No.734

Yes. Start with /r/mechanicalkeyboards wiki.

Anonymous 2015-06-12 15:40:28 No.735

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>>733
I have wide shoulder so for me spacing is more important than key type. I have a Microsoft Natural 4000 [http://www.microsoft.com/hardware/en-us/p/natural-ergonomic-keyboard-4000] and it's worked out well for me, except they aux. numpad means I have to reach really far to use my mouse, which causes wrist pain.

Anonymous 2015-06-19 15:34:10 No.773

>>733
I'd like to have an Ergodox too some day, but the way they're distributing it (the whole massdrop thing) seems to have ignored the new vote for ergodexes: the necessary amount of votes has been reached months ago, but nothing's happening. I don't have to cash to let someone else print the case for me, sadly.

Anonymous 2015-06-29 00:09:21 No.799

I have built a couple Phantoms and will soon be building a duck Orion V2.

A Phantom is a good place to start. You need switches, caps, diodes, stabilizers, pcb, plate, teensy, and case. I think the plate and the case are the hardest to come by, as you have to fab your own or buy an existing one. Check out Deskthority's phantom guide.

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Origami Anonymous 2014-11-21 20:15:30 No.175 [Reply]

Hi /diy/! anyone into origami? any good links with models?

6 posts and 2 image replies omitted. Click reply to view.

Anonymous 2015-04-08 14:41:29 No.583

>>569
>thine handiwork
'thy' is the correct form.

Anonymous 2015-06-12 23:48:33 No.737

File: 1434152913038.pdf (5.95 MB, 1433672585542.pdf)

Anonymous 2015-06-13 00:13:30 No.738

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Anonymous 2015-06-13 00:19:02 No.739

File: 1434154742260.pdf (460.93 KB, fish dolar.pdf)

>>738

Anonymous 2015-06-13 00:48:09 No.740

File: 1434156489420.jpg (370.45 KB, 1200x675, 1.jpg) ImgOps Exif iqdb

I did this one some time ago, the model is from Kade Chan (Fiery Dragon).
Tissue-foil 45x45.

In past I was fascinated with origami. Did many complex models and I have many photos here...
I recommend watch "Between the Folds", a documentary about science and art or origami.

File: 1430962607983.jpeg (8.98 KB, 300x168, soykaf.jpeg) ImgOps iqdb

Soykaf thread Anonymous 2015-05-07 01:36:48 No.653 [Reply]

Why haven't you make soykaf yet lain?
>https://www.youtube.com/watch?feature=player_detailpage&v=bZsNu30s0OM

6 posts and 2 image replies omitted. Click reply to view.

Anonymous 2015-06-03 05:10:37 No.703

>>694
http://stw.darknedgy.net/index.php?title=Foraging#Acorns
there are brief instruction on how to make coffee with acorns here if anyone's interested.

Anonymous 2015-06-03 07:18:04 No.704

>>695
I used to be heavily addicted to it doing ever increasing amounts(200-300 mg) daily and was an asshole when I didn't have any so I just decided to quit using it.

Anonymous 2015-06-11 07:23:51 No.728

>>653
>drinking the testosterone destroying choob

I stick with real coffee

Anonymous 2015-06-11 07:26:31 No.729

>>704
Voltaire drunk 50-70 cups a day. I drink perhaps 4-8. You should, too. Stabilizes mental health I read lately. Many, many good properties in general and only very, very, very slightly carcinogenic, but what isn't? Helps memorizing stuff and has slight anti aging properties.

Anonymous 2015-06-12 19:32:58 No.736

>>729
god damn

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Anonymous 2015-06-07 18:39:36 No.722 [Reply]

What do you guys think of tinkernut?
https://www.youtube.com/user/gigafide/videos

Anonymous 2015-06-07 19:40:44 No.723

I just watched his ethernet cable hacks. Pretty cool.

Anonymous 2015-06-08 08:41:14 No.724

>>722
i've been following his videos for almost 10 years now. His new videos just arent as fun as they used to be.

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Anonymous 2014-10-12 01:48:13 No.7 [Reply]

Free energy.
Let's discuss ways to charge batteries using alternative sources of energy.

My issue: How can we use solar energy without buying an expensive solar cell?

50 posts and 4 image replies omitted. Click reply to view.

Anonymous 2015-02-19 21:47:39 No.445

>>444
Also, hot water everywhere. Iceland.

Anonymous 2015-05-07 16:11:01 No.656

What would you say is a good way to start with green energy?

i like the idea because green energy is more passive then other more traditional energy resources

how much money would you say it would take to start?

Anonymous 2015-05-07 17:58:32 No.657

>>656
I agree. I do not think we will ever fully stop using oil, though. It will just be kept to a minimum; used for the most important tasks.

>how much money would you say it would take to start?
Are you talking about you, your family, your neighborhood, town, society? On what scale are we talking? Either way, it will be expensive at first, but may pay off over time.

A good link for you: http://www.fastcoexist.com/3041300/portlands-new-pipes-harvest-power-from-drinking-water
A new way to generate green energy using gravity.

Anonymous 2015-06-02 12:53:36 No.701

My plan is to have the following energy sources available on my own property when I buy one (I'm only 19).

Home made wind turbines, I have seen some cool low profile designs made from tin sheets, metal poles, bicycle gears and a DC motor.

Home made Bio-fuel Ethanol, because I plan to have my own Garden and make my own alcohol it will only be a bit more effort to use waste vegetable matter and distill 180 proof or higher ethanol. This can by stored and used to power a vehicle or a generator for power on demand.

Thermo electric power generation, I have always liked wood fires and will probably have one, so I could utilize waste heat and turn it into electricity by either a steam turbine or Peltier chips (which produce a current the bigger the temperature difference from the cold side to the hot side).

If I had a property with a large hill I would set up a shed and large water tanks at the top, then when I release water from the tanks it powers a water turbine like a dam. The water can also be used for my garden, alcohol distilling, bathing and drinking of course.

Anonymous 2015-06-03 02:38:13 No.702

>656

Here in Australia I have seen one person do it with his whole family, he is rich AF though.

I asked him some questions one day;
>Off the grid property $60,000AU
>Shed to temporarily live in and store batteries $15,000AU
>Solar panels $25,000AU
>Small kit built wind turbine $10,000AU
>Power inverter and batteries $10,000AU
>Eco house $150,000AU

All this lets his kids stay home all day and and play Games on four computers each with high end tripple way GPUs, That's a lot of power being wasted by gaymes.

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Anonymous 2015-03-04 20:19:17 No.482 [Reply]

What would you guys do with a small raspberry pi portable with keyboard? I know a guy with a 3D printer and I have a limited amount of money. Seriously concidering making this a project, but need some uses for it.

Ideas?

5 posts and 2 image replies omitted. Click reply to view.

Anonymous 2015-05-03 15:28:21 No.644

>>482
I've set mine up as a 'hotspot' on the street.

I think you can guess what I'm doing.

Anonymous 2015-06-01 01:32:37 No.697

One is a motion detecting trailcam.
The other is a i2p router.

Anonymous 2015-06-01 02:03:54 No.698

>>644
What if someone uses your connection for illicit purposes?

Anonymous 2015-06-01 03:38:34 No.699

>>698
Well, of course he doesn't know what he is doing, and it just HAPPENED to be used for something wrong, and he totally didn't mean it to be that way, and he'll secure it from now on, and officer, he will fully cooperate.

Anonymous 2015-06-01 10:08:18 No.700

>>482
>Portable programming computer

>Pen-testing with Kali etc

>Game console emulator

>Pirate Box
http://piratebox.cc/start

>Mesh net node
Project like http://project-byzantium.org/

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