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File: diypcb.jpg (48 KB, 640x426) Image search: [iqdb] [SauceNao] [Google]
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Your opinion on DIY PCB Making
Hi, I am working on a school project and I would really appreciate some input. I have to ask questions on the process and common problems of making PCB boards for a presentation

1. What is the most time consuming part of making a PCB? Is there a part that significantly slows down the progress and why?
2. What part of the process (creating the schematic, etching, etc) is most prone to errors?


Thanks.
6 replies and 1 images submitted. Click here to view.
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>>946991
You're just doing a presentation, no PCB of your own? Alright.
Well, it depends entirely on the method. Now the two primary methods of DIY PCB making are the photo resist method and toner transfer with toner transfer being the worse, but more easily accessible choice.

The most consuming part of making a PCB depends on the project, creating a design for the schematic can take days or a few minutes, obviously depending on complexity, but in general I'd consider this part to be fairly short, if anything...
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>>947011
The final step of production is etching, depending on the etching solution time and results obviously may vary.
Personally I use the mix of HCl and Hydrogen Peroxide. If the prep-work was done correctly, I end up with a good looking board in about 15 minutes of etching.

The most time consuming and error prone part of the process is the step of transfering the design from paper to your PCB.
This step is why I personally use the photoresist method, since it produces much, much more reliable transfers.
>>
I didn't know /diy/ does homework.

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Hello,
I live in an apartment and I think that my neighbor spies on me. Every time I start a conversation I hear the sound of glass coming from my ceiling. My upstairs neighbor is a possible psycho and she loves to gossip. How do I check if she is really eavesdropping on me? I don't wanna beat on cold wood and play music all the time. I want to build my own eavesdropping device to check what she's talking about/the glass sound. I have a drill, mic, and basic soldering skills. I don't wanna buy anything expensive.
58 replies and 5 images submitted. Click here to view.
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>>943435
Create an acoustic speaker that picks up from the neighbors floor using a hole in your ceiling followed by hard woods and and ear piece?
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>>943435
the only solution is to spy on her back.
>>943436
this

or just get a duzz piezo buzzer and attach it to your ceiling plaster.
it will make it vibrate lowering the SNR to the point where all she will hear is buzzing.

Or, home alone it and run suspicious conversations from old movies and talk back to them occasionally about conspiracies. you might get murdered though.

you'd have better luck just picking up her wireless handset signal and...
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>>943435
This is >>>/adv/ not /diy/.

You need to stop being paranoid.

File: fightstick_03.jpg (126 KB, 1024x644) Image search: [iqdb] [SauceNao] [Google]
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guys, like a month ago i ask how could i make my led buttons to lit up on press, and i got a question

can i wire the wire of the button and the 5v for the led, on the same terminal? that way when i press the button, it would activate the button of the pad and the conection of the led...does this work?
5 replies and 1 images submitted. Click here to view.
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>>946973
Uhh... What? You're basically trying to build a house with a pile of wood, and asking if you can screw wood together. None of what your asking makes sense without context.
>>
uh..ok, ill try again, i want to use the same switch of the arcade button to activate, the button of the xbox360 pad AND the circuit for the led, those 2 things with the same switch, is it possible?
>>
>>946973
No. You'll need a double-pole switch, or a transistor to switch the LED.

The problem you'll get if you put the LED in series is that LEDs have a forward voltage. The controller controller is expecting to see either open or 5v, but if you put in an LED it'll see either open or <5v - LED forward voltage>, which will confuse it.

Plus the internal resistance of the input pin is probably sufficiently high that you won't get enough current to light an LED.

Interesting projects threads. What are the favorite things you've worked for?
Personally, I really enjoyed working on a miniature wooden chess set. I don't have any pictures right now, but it didn't turn out so well anyway. I went to put the magnets in the pieces, but I didn't consider the possibility that the magnets would be TOO strong. So the set is basically unusable because all the pieces try to latch onto each other.
Pic not strictly related, another fun project, but not really interesting.
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>>946759
My favorite project was just this last september. I had a thick piece of table top glass I got at an auction for $5 that had been sitting around for a couple years, and I decided to incorporate it into a coffee table for my best friends wedding gift. The most difficult part was faceting the tops of the legs, and I think it turned out great, especially for my first serious solo project.
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>>946861
how'd you attach the glass to the legs?
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>>946864
Hammer and nails.

Ok I need some hardcore advise.

On friday I'm getting my first 3d printer, second hand, a XYZ Da Vinci 1.0a. It only has about 40 hours of use on it and it comes with a ton of filament already. It's already had its firmware hacked so it can use other brands of Filament.

Now what I'm getting to is this.

I am going to attempt to make an actual working Pip-Boy Mark IV. Shut up it seems like a challenge.

But I don't want to use a cellphone for it. I'm aiming for a Raspberry Pi with a Touch Screen in it.

Now comes the Issue.
I...
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10 replies and 2 images submitted. Click here to view.
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When you need advice and pretty much everything, then I have to assume you haven't even tried to google the subject. As for the best source for the Pi. Their own forums.
https://www.raspberrypi.org/forums/
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>>946298
I Figured I would come here for guidance.

Google doesn't always get things right 100% of the time. And asking here people have found resources off the beaten path.
>>
Both of these hobbies have very steep learning curves
How about learning the basics of each before you try to jump into a large project eh?

File: 555_DIP.jpg (29 KB, 640x480) Image search: [iqdb] [SauceNao] [Google]
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Hey /diy/
I found ic555 chip, how can I use it?
I have searched google images for some guitar effects schematic and i found nonthing.
Can you dump something intresting?
10 replies and 1 images submitted. Click here to view.
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some of the first results when you google "555 timer guitar pedal" are for tremolo effects.
>>
Only thing I ever made from electronics was a keyboard consisting of a 555 chip, a bunch of switches and a bunch of variable resistors. Was pretty cool.
>>
If you hook up lots of transistors to it, you can make a computer.

File: IMG_0093.jpg (187 KB, 1200x1600) Image search: [iqdb] [SauceNao] [Google]
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Thermostat / Wire Colors
C? = Brown?
Green = Green
Yellow = Yellow
White = White
RC? = Unused?
R = Red
W2? = Unused?
Y2? = Light Blue?

Gonna go try it real quick. brb
9 replies and 1 images submitted. Click here to view.
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>>945376
Shit there's an orange as well. I see O/B & W on one terminal. W2 is supposed to be black, I think. It's a Trane HVAC btw.
>>
There's really no telling. Find the other end of it and see how he wired it up. I've gotten to the point I never trust anyone's wiring anymore.

It's also old phone color code.
1- Red/Green
2- Yellow/Black
3- Blue/White
4- Orange/Brown
>>
>>945376
Do NOT RELY ON THE COLORS!!!

Often the original installer will have disregarded the color-guide, and just wired the wires how-ever he thought to get it working.

This is why when you buy a thermostat, the instructions even say to mark the wires-connections on the OLD thermostat BEFORE removing.

With your pic, the only way I'd feel comfortable going about that, would be to go to the furnace and VISUALLY inspect what wires are connected to what terminals.
For all you know they wired BLUE to the Common.

Just has a service call this morning, heat-only furnace. The guy had run 4 wire thermostat line, only needing the 2 wires, he connected the thermostat to the furnace on the BLUE and GREEN lines and pushed the RED and WHITE back. Madness.

File: image.jpg (2 MB, 3264x2448) Image search: [iqdb] [SauceNao] [Google]
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Anything cool I could do for my little fishy ?
31 replies and 6 images submitted. Click here to view.
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>>945313
Paint your balls bright colors and stick them in the tank.
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>>945321
What kind of paint should I use ? Could I try using a black light on the tank ?
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>>945323
Black light on your balls with probably get you steryle and/or give you cancer

air conditioner suggestions?

here in socal its already into the 80s of degrees. im an island boy so its nbd, but its not even valentines day so im expecting the hottest of hot summers. i need help picking out an air conditioner. i was hoping to keep it around $115 but the problem is i have really retarded windows like pic related.

being three stories high i dont really have any options for securing it nicely outside. anyone got any ideas for what the fuck i can do? i can maybe go up to 200 bucks for the totalness of everything. not looking to invest in a stupid...
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4 replies and 2 images submitted. Click here to view.
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>>945169
Are all your windows louver windows?
>>
File: stand up AC.jpg (102 KB, 620x898) Image search: [iqdb] [SauceNao] [Google]
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>>945196
The best thing you can do is get a portable stand up AC, and put it in the window.

Remove the bottom pane of glass and shut the top of them. Hopefully youll find a stand up with the size close enough to fit that you can tape or shim in with insulation foam or whatever
>>
>>945169
You don't have an existing unit already installed OP? And how big of a place are we talking?

File: butterflymobile.gif (3 KB, 129x131) Image search: [iqdb] [SauceNao] [Google]
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For my physics class, I have to make a rotational equilibrium mobile. Objects of different masses are to be balanced on multiple hanging levels. We can use any set of objects for the project, as long as it has a central theme. I was thinking about getting a bunch of my little pony/horse dolls and titling my project "hung as a horse", but I don't think that'll settle well for a school project. Anyone have any other clever ideas?
9 replies and 1 images submitted. Click here to view.
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Get a bunch of rubber super balls and tilt them, then title it "saggy balls"
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>>946709
You need big black dildos and little white solids. The black side will hang lower, name the project "saw that cumming :^)"
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>>946711
*white small dildos, not white solids, Damon auto curry

File: 1455497796216629231349.jpg (3 MB, 4160x2340) Image search: [iqdb] [SauceNao] [Google]
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What wire goes where? Red to black? The fuck?
7 replies and 1 images submitted. Click here to view.
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Please guys i dont know the first thing about this
>>
Don't tell us what it is don't show wiring diagram how the hell do we know
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>>946673
Wiring diagram? Its just a foot pedal for a flex shaft dremel. The wires were twisted together instead of being crimped. I just dont get where the red one goes if theres only black to connect it to.

I'm new to interior design/home decor, but I want to make (or buy idc) a lamp that uses an Edison bulb and I envision it like a "crane" where.

Anyone know what I mean? I feel like I've seen something like this before.
7 replies and 3 images submitted. Click here to view.
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>>946631
>and I envision it like a "crane" where.

What?
>>
>>946636
Sorry, I envision it looking something like a crane, where the bulb and chord hang from the stand.
>>
>>946636
>>946676
Kind of like this, but large enough to sit next to a chair and end table, etc.

File: SAM_5503.jpg (254 KB, 399x599) Image search: [iqdb] [SauceNao] [Google]
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Do you know what the hell happen to this monitor and if i can still repair it by just open it and take out a dust bunny?
8 replies and 1 images submitted. Click here to view.
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>>946619
Looks like a ribbon cable went kaput
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>>946620
can i do something about it? or my baby is on borrowed time now?
>>
was this because heat? cause i don't want it's replacement to have a similar fate.

File: scrooge-mcduck_197x282.jpg (34 KB, 197x282) Image search: [iqdb] [SauceNao] [Google]
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Should one clean ancient coins that one buys on eBay and such? Is there a risk of damaging them? What's the safest cleaning technique, generally speaking?
21 replies and 2 images submitted. Click here to view.
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yeah, you are gonna want to remove any dirt on the surface, especially the patina,

it will be worth more with out it

are you new to coin collecting?

if you soak them in vinigar or ketchup, or coca cola, something acidy

you should google it real quick though
>>
>>945598
Thanks for the advice.
Yes, I'm new at coin collecting. I bought some coins on eBay from auctions that had no bids, far below the price that they usually sell for (I researched prices using several tools before buying).
I received the coins I purchased, however, many of them are coated in some kind of ancient dirt/filth.

Is there a risk of damaging coins in the process of cleaning them? Also, how much can one expect to gain in terms of price after cleaning the coins?
>>
File: 1.jpg (49 KB, 429x600) Image search: [iqdb] [SauceNao] [Google]
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Is dis nigga srs, NEVER CLEAN COINS. Maybe brush with a soft, dry toothbrush to remove grime but never remove oxidation or patina, you will actually lower your coins value by doing that

File: IMAG1927.jpg (2 MB, 1520x2688) Image search: [iqdb] [SauceNao] [Google]
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Hey all. Recently got into the diy world through cheap and creative solutions for my band equipment. I'm trying to figure out a way to attach 2 flight cases together. I could always do the standard casters and cups, but I want to figure out some sort of vaguely quick release system to lock them together for transport, but also be able to detach them without the use of tools once we arrive at the venue. Any ideas on what would be a smart move?
5 replies and 2 images submitted. Click here to view.
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Locking castors & cups, or ratchet straps. Or maybe both.
>>
Seconding ratchet straps, harbor freight for cheap

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