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/diy/ board - Do-It-Yourself - May 2014

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Most viewed threads in this category

What to feed my friends....

What to feed my friends.... 9 posts and 0 image replies omitted. Click to view.
My buddies are helping me put up a fence today. I have drinks but I am at a loss as to what to feed them. Its going to be hot, dirty work. Any ideas?
can I use a breadboard for... 16 posts and 0 image replies omitted. Click to view.
can I use a breadboard for analog circuits at, say, 5Mhz? Or would it cause problems. I will make a filter on it. Would I have to actually use solder and stuff?
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Okay guys I've looked up a ton of stuff and I'm just too stupid to understand. Can someone explain to me in 6th grade English what transistors, resistors, and capacitors do?
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Hi /diy/. I'm a chemistry student, but I'm interested in how raw minerals and shit is turned into usable chemicals. Every once in a while while browsing wikipedia there'll be a short snippet about the original process for making such and such chemical. I figure there's a few people here who like to know how to do X or how to make Y from scratch in case of apocalypse, or armageddon, or what have you; but what about chemistry? I'm having a hard time finding a modern text on the production of chemicals from raw materials that's doable on a scale that doesn't require a gigantic plant. Mostly all I can find are archaic alchemy-age papers and journals about individual processes. Does a modern guide to alchemical-level chemistry exist?
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Hey /diy/ I'm really confused how to drive an npn transistor... I'm using this NPN: http://www.farnell.com/datasheets/1600370.pdf and i would like to turn it on using a 3.3v arduino DIO. I'm having trouble calculating the base resistor? I've searched google countless times only to be more confused. Any help would be great!
Sup /diy/I have basic... 2 posts and 0 image replies omitted. Click to view.
Sup /diy/ I have basic soldering skills and a decent amount of programming skills. However, I know very little about PCBs, integrated circuits, creating programmable boards, etc etc. I want to learn. Can anyone suggest books, internet articles, courses, etc. to use?

"Vitamin" pill press

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Please excuse this picture dump , It will make explaining my project easier, 1 factory built Pill press.
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Sup, /diy/. Real beginner here. I would google but I don't know the name of the thing I'm asking... so let me try to describe it. I've got this here drawer thing above the cabinet under my sink. Well, 2 as you can see. And they're held in by these plastic doohickeys that pop right off - they're just panels and have no functionality. I want to take one, install a basket (for sponges, etc.) and create some sort of hinge joint(?) on the bottom so that I can stick a handle on there and whenever I need to use a sponge I can just pull it out. Does that make sense? I'm not super good with jargon, but I can drill a hole if I need to drill a hole. >already taken measurements, just need to know what to do
So I've got a bunch of... 17 posts and 0 image replies omitted. Click to view.
So I've got a bunch of Li-Ion battery packs (mostly from cameras). I think about 2kg. Most of them are dead. Can I do anything useful? Like, extract the lithium?

LED Control Module

LED Control Module 7 posts and 0 image replies omitted. Click to view.
I am looking to add some LED lights to something. I am thinking a dozen or so. What is out there that i can plug some LEDs ito and provide power to them? I tried hacking up an old 9volt power supply but i think it burned the LED out almost immediately. Need something with a switch.

NV monocular repair

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My dad bought a broken nightvision monocular for $25, expecting to be able to fix it. Neither of us have any experience with these things, but I noticed that there's a white film near the eyepiece that lets almost no light through. Pic related, the monocular with lenses removed. You can see the white film. It appears to be a Night Owl Optics Explorer Marine Pro. From what I can tell, I need to replace the image intensifier, but I'm not sure where to get one or how to do it.
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Can someone teach me how to use this switch?

Steel bar cold bending

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What diametre of steel bar could I cold bend fairly easily? I can heat it up with a blow lamp if required. I need to put a 90 degree bend in it.
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I've been thinking about an Art Video project. I've always been fascinated by the idea of multiple televisions broadcasting the same thing for some reason (it's hard to explain). What I'd like to do if take a video and have it playing on several televisions at once (we're talking 10-15 TVs); the only problem is, TVs being moderately expensive, the only ones I can afford will be crappy, analog TVs (although I do prefer that aesthetic). Now, would I be able to hook up 10-15 televisions to one VCR/controller, and have them playing the same content simultaneously? I'm not saying hook up 15 VCRs, press play, and hope they all sync, I'm wanting perfect synchronization. For this, I'm thinking about using multiple RCA Splitters. I feel like the main issue with this would be splitting one channel into fifteen channels will greatly weaken the signal to each TV. Would there be any way to strengthen the signal on each RCA splitter? I'm really bad at electronics and have very little knowledge. I'm just wondering if what I'm wanting to do is even possible, really.
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Hello, /diy/. I was curious as to how high-detailed photo blankets are made. Can they be handwoven?
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Eagle Project thread: post pics and descriptions of yours or friends'. Mine was a shelving unit for my high school's computer lab

Android LAMP Stack

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I recently found a renewed interest in building my website back up, which I haven't touched in nearly a year. I have Ubuntu almost ready on an old laptop I can set up and leave alone as a temporary host, but I was wondering: is it possibly to install a LAMP stack onto an Android-based device? Since there are now things like the Amazon Fire TV, Android Mini PCs, etc. I thought it might be an interesting feat.

room stuff

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feww weeks ago i got a new room. it is painted now, has basic furniture... now i want some home made decorations (e.g. book holders) with some utility in them. I would appreciate your ideas. pic semi-related

Motorized Bike

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I'm new to building motorized bicycles in general and I gained a lot of knowledge through some forums but also have some questions of my own. I am looking at building my own bike, after not being able to find a schwinn occ stingray like I wanted to locally. I would like to build a frame similar to the stringray or chopper, but have no idea where to start for measurements, what type of material to make the frame out of (i.e. aluminum, 4130 Tube), Would round stock or sq. tube work better? As for the motor kits, are the china kits worth it or am I better off making my own? Is there any good sites for buying the parts that I cannot fabricate, such as tires, rims (one wide for the back tire), chain, tail light, head light ect.. As for lighting, should I use a motorcycle battery and allow the engine to charge it? That way I won't have any issue about not having lights when I run out of batteries / don't have any spare. I have no issues welding, but what is a good cheap tig welder? The only ones I have used are the larger transformer or small inverter miller machines and they can be expensive if cannot be found used, even used can be expensive. What material should I use for a custom exhaust? One that wouldn't lose it's chrome or other properties when heated. I'm only a college kid and a bike would be great to get around town / campus on. It would be a lot cheaper than my truck for the small investment.

Own Keyboard

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Hi /diy/ im new here so don't be shitty w/me. I wanna make my own game keyboard (arround 20 or 15 keys) for play MOBA games or games like WoW. Can you help me do the circuit on PCB? PD:I will use mechanical keys PD2: Im from spain sorry if i have bad english :P
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