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/diy/ Do-It-Yourself

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Most viewed threads in this category

Stereo amp jammer.

7 more posts in this thread. [Missing image file: 1338113323639.jpg]
A cellphone near PC speakers will produce a load buzzing sound when you get a call because of RF noise in the amplifier. I really need to build a device that does that deliberately at a range of a few meters. The asshole who moved into the apartment above me insists on running his huge stereo system all day and night. I can't sleep or study. I'm assuming he'll shut it down rather than listening to horrible buzzing. I'm a computer engineer so I do have a lot of electronics experience, but not much when it comes to audio amplifiers or RF. I was thinking of a transmitter around 5 watts that sweeps through different carrier waves. Possibly two separate sweepers going at different speeds. Could anyone with experience in these matters give pointers? What range of RF frequencies cause the most interference in audio amps? Should I be am/fm modulating the carrier with something or does that not even matter.
4 more posts in this thread. [Missing image file: wooden-bracket-171169L[1].jpg]
I need a couple wooden brackets that can hold at least 100kg. Would this be possible and how would it look?

RISK board

4 more posts in this thread. [Missing image file: Rawrrr.png]
Sup /diy/nosaurs, So I have these four boards of leftover 9mm MDF from this other project. They're all 24" by 24" and I'm planning to take two of them and make a big-ass Risk board. (One is halfway to becoming a Pente (or Go/Weiqi board), and I'm probably gonna make the last one into a monopoly board.) Thoughts so far: >Carve out the water to a lower level and fill it in with a clear resin so it'll have that water look. >Maybe raise the countries a little, with clay or plaster to add texture there too. (Advice on this? I'm not sure how well clay or plaster will bond to the board. Also don't wanna make it too unstable to rest pieces on.) >Put magnets to the underside and make the pieces magnetic somehow. >And add New Zealand (this has always bugged me, and this board's gonna be wider, so there's room). If you have any cool ideas please contribute, but what I really am looking for help with is how to create the little army pieces (which were always the coolest part when I was atalented /diy/er. I could obviously buy some, but this *is* /diy/.
11 more posts in this thread. [Missing image file: DSC04924.jpg]
>starting a new project >5-channel audio mixer to take input from my TV, computer, radio, tape deck, and extra >dual-gang potentiometers cost at least $10 each >nothing at the dump ever has them in it > available funds: $20 Well, fuck. I also need at least 14 RCA connectors, the panel-mount kind aren't too common at the dump. Anybody have any tips for finding this stuff for cheap or free? Nonetheless I'm going ahead with the project. Attached is my doodle of a schematic. Just imagine it duplicated for stereo, I can't be arsed to draw the whole thing. Note that these are all linear pots, not log, the parallel resistor is to create a log curve approximation. I've had good results like this before. As you can see, it takes in 5 inputs in virtual-earth configuration, and has three outputs (two tape and one main) with levels selectable between +4dBU and -10dBV, and a selectable VU meter which is calibrated to read either 0dBVU = +4dBU or -10dBV, depending on what the output is set to. A question I had for you guys: The case I'm using is from an old audio amplifier, and it has built into it a 30 volt power supply, which I left in when I stripped it. Since I need a dual supply for the op-amps, and ground is relative, can I just use a voltage regulator to provide a 15 volt supply, then use THAT as the ground, creating +15 volts (from the regulator to the + rail) and -15v (from the PSU's ground to the 15v regulator)? I don't see why this wouldn't work. Also, what do you think of my schematic?
4 more posts in this thread. [Missing image file: Desk.jpg]
Hey /diy/, hoping you can help me. In this photo you can see my computer desk with my AV receiver on it. You also see my Ikea shelve that I keep my consoles and cable box on. I really want to get my AVR off my computer desk but its not gonna fit on the shelving unit. I could also get another Ikea table to put it on but I was hoping for something a little more elegant. You guys have any ideas?

Underground Bunker thread

31 more posts in this thread. [Missing image file: bunker.jpg]
Hey guys, I need to know how I could improve me initial Multi-Story underground bunker design. I would also like to see your bunker layouts as well (a quick sketch or something just as a comparison) And can somebody please give me estimates on: >Initial cost of the project >suitable location >If my design is structurally sound >how can I improve on this >length of time it would take to complete Please respond.

Driveway Gate

8 more posts in this thread. [Missing image file: 1x6 dog ear cedar 3-rail fence and (...).jpg]
Making a 8.5'x5.5' driveway gate. I am planning on replicating the gate in the photo and using 6x6x8 posts.Anything wrong with this guys method? All I see driving around town are shitty looking saggy drive gates that drag along the ground or rely on a wheel. My driveway is bumpy gravel so I have to rely on this thing being stout and not sagging. He re-inforces his posts with a 2" steel flat bar, but I don't have a drill press or a way to cut a dado so I will probably skip that bit. What would be a reliable method for setting the posts? The way I've done it in the past for regular fencing is this: 3.5' deep hole 4 inches wider in diameter than the widest part of the post. From the bottom: .5' gravel tamped down, set post on top, then 1.5' tamped gravel, 1' concrete dry add water and mix well, finish with gravel. The posts I plan on using are 5.5x5.5x8 pressure treated from home depot, $33 a piece, is that a ripoff? What do I look for in a post? I seem to remember being told to get timber with as tight a grain as possible. Finally, Are those adjust-a-gate things worth a shit? I need to do a double gate due to space constraints (and to distribute weight among two posts). But $200 for two metal frames is pretty steep, also as far as I can tell the hinges they provide only swing 90°.
20 more posts in this thread. [Missing image file: 1369197487246.jpg]
How can I make a custom helmet like those in the Sentai series'? How can I make it strong enough to be actual protection, like a motorcycle helmet? Are those types of helmets strong enough to take blows from bats and other types of things?


23 more posts in this thread. [Missing image file: Killswitch.jpg]
I wanted to install a killswitch into my guitar which connects the hot wire with the earth wire. If only got this normally open switch with 2 soldering points. I want it so the led lights up while i press the button, but pic related didn't work, any help? I also double-checked current-flow for the LED.

Simple RF stuff

9 more posts in this thread. [Missing image file: rfstuff.jpg]
Hilo /diy/~ I'm building a simple 1 condition remote indicator for my radar detector to my motorcycle helmet. I've already got an trigger LED tapped, so I just need to get the signal from the radar detector to the helmet. I've used these simple digital sparkfun RF chimps before, and RF seems like only way to go here, but since they're digital I have to use 2 micro controllers, and since I just have a simple 1 condition device, I don't to send digital messages. Can someone point me towards some basic on/off RF chips? Or is there a better way to tackle this problem?
6 more posts in this thread. [Missing image file: IMG-20130527-00151.jpg]
I have here an old pair of Crocs sandals, and rather than throw them away I'd like to fix them. The problem (as may be visible in my shitty photos) is that the 'thong' part of the sandal has been dislodged. This never bothered me while I was using them as shower shoes, but after having to actually walk briskly in them at one point I realized that I really do need to fix them. My ideas so far are as follows: 1. Use a strong glue to glue the base of the 'thong' back into its groove (from which it was broken off) 2. Use a soldering iron to heat the rubbery stuff around the 'thong' at the point at which it broke, and 'meld' the pieces back together (this idea is much more iffy to me) I will post a few more pics real quick.
5 more posts in this thread. [Missing image file: IMG_00000289.jpg]
What does /diy/ think of my solar kiln? Its hard maple from a small sugar maple I cut down. Going to use the wood to make my own maple wood cigars. Theres water collecting at the bottom of the plastic tarp.
1 more posts in this thread. [Missing image file: 1369103208908.png]
Hi, everyone. My fake leather office chair smells absolutely terrible. I disinfected it one too many times with strong cleaners (it's cheap enough that I wasn't concerned with keeping it in good shape) and it's recently started to smell quite odd. It smells very strongly like it did when it was brand new, and the smell can attach itself to my clothing if I'm in it for too long (which, as a 4channer, I quite obviously am). Instead of buying a new chair, I thought I'd get some sort of cover for it. Since there's no such thing as an office chair cover, I thought I'd make one. Does anyone have any ideas as to what the best method of accomplishing this would be? I was thinking of buying a nice blanket and modifying it to sit snugly over the back/seat/arms of the chair. Thanks in advance!
21 more posts in this thread. [Missing image file: images.jpg]
Good evening /diy/kes. Been a long time no lurk but i come seeking advice. The construction company i worked for recently finished the job afew months back and being one of the last employees i got my take of the odds and ends they couldnt/didnt want to ship back across the country to the next job. Amongst these items were boxes and boxes of lightbulbs (we built 200+ base houses, every lightbulb in every unit had to be replaced with a bullshit CFL). Anyways i have about 500 Clear light bulbs. In the boxes i grabbed were also alot of CFL bulbs which i replaced all the ones in my house with because lolwhynot, so i have no use for the incandescent ones. >The question. What do? My inital thought was packaging them up and selling them as "Lightbulb terrarium kits" on ebay or some shit, because im sure some hipster faggots will eat them up for 10 bucks a pop. Either that or sneaking them upriver when shad or something popular is running and dumping them all in then race back down river for lulz to be had when everyone sees 500 light bulbs floating down river. Perhaps one of you gents have a better idea?

String light projects

3 more posts in this thread. [Missing image file: 1347945127879.jpg]
Any ideas for (incandescent) holiday string lights? I have some extras that are taking up space.
6 more posts in this thread. [Missing image file: image.jpg]
Could I use flat white paint as a primer substitute for a shed. Outer coat will be red.
2 more posts in this thread. [Missing image file: 38111261.jpg]
Guys I 'd like to learn touch typing. How does a hunt and pecker terminate the bad habits?
3 more posts in this thread. [Missing image file: opus-shelving_large.jpg]
Wondering if anyone would be able to show me how to go about building this "Opus Shelving" style bookshelf/storage. Hoping to do this for less than 450 which is what it costs to buy straight up. Thanks in advance /diy/
1 more posts in this thread. [Missing image file: driver.png]
Hey diy, I'm looking for a part. I'm using these led drivers and I need to make them waterproof. Any ideas on containers or anything? Planned on using some liquid electrical tape and jb weld to pot them. Just need a "case" to put them in. Smaller the better. Dimensions: 1.10 in x 0.71 in x 0.31 in (2.8 cm x 1.8 cm x 0.8 cm) Weight: 0.56 oz (16 g)
5 more posts in this thread. [Missing image file: 2465A.jpg]
have we got any EE's in the house? I've been getting into electronics lately and I really want to get an oscilloscope to help with some projects that I am working on. The only issue is that I'm a poorfag and only have a minimal amount of money to spend on one. Ive found a 2465A tek for cheap on ebay, but i was wondering how good the quality was on it. another issue i have is if the specs live up to the hype. I am aware that a DSO would probably be better, but all the low end equipment is just that, LOW END. >TLDR; What's the best cheap o'scope i can get.

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