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/diy/ Do-It-Yourself

Threads added between 2015/02/11 and 2015/02/18

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Most viewed threads in this category

solitude of chill

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what i want to do is take pic related and take either a homemade or portable air conditioner and direct the air into the tent. the queen size tent dimensions are 80" (L) x 60" (W) x 53" (H). which is just shy of 150 cubic feet. So i want to cool just this instead of all 5000+ cb ft of my top floor apartment. I want to ask is there any reason this wouldn't work and ideas on how to set this up, I cant find any info online for air condition just 150 cubic feet.
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Why can't people into good color temperature anymore?

polyester resin hardenner

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i bought some bog. its polyester resin based. it came with a hardenner. is the hardenner like the catalyst I buy with fibreglass resin? or are ratios super important like potting compound where it will just never set if I dont get the ratio perfect?
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Would this work? I mean... it looks cooler than regular prosthesis. Which downsides to you think this has?
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I've come by a few older stereo speakers and would like to use them to start building a decent surround sound system. The idea is to get a good surround sound receiver to drive them, acquire a center channel speaker from somewhere and then upgrade/add-on to these older speakers as funds permit. Pic related; the older, smaller speakers I've found. Source; google. My problem is the speakers are quite different. While both pairs are 8 ohms their maximum wattage ratings are pretty different. The ones pictured here, Pioneer CS-66G's, are rated at 40 watts max. My other pair, Pioneer CS-903's (pic to follow), are rated up to 300 watts and recommend 70 watts for average performance. Since I've never had a real surround sound system before how would I go about balancing this out so I don't blow the 66G's apart but still get good volume for the 903's? Do I even need to worry? Finally, is their any quick and dirty method of selecting a center channel speaker other then testing it with my system?

2 weeks off. What do.

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Hey /diy/, I have the next 2 weeks off and I thought I might spend it on a fun project. I'm not that skilled but thats why I wanna start doing these things. Do you have any ideas on what I could make? I thought maybe some of you have some guides or whatever. Thanks in advance!
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I'm building a housing for a single board computer + hard drive. As the CPU can get hot, it needs ventilation. But I wish it not to get dusty. So: What DIY trick / material can be used to filter the dust? Currently I'm considering tulle fabric / thin PC chassis air filters, but none of those seems suitable. For the housing I'm going to use acrylic glass, so I'd prefer a material looking better than those black PC air filters. Also, I fear that due to passive cooling, even with chimney effect, the draught is too low to force the air through. I'm planning to mount the filter to the top of the box, which happens to be a acrylic glass sheet that'll get a mesh of drilled holes soon. The bottom of the case stays open, that'll do for the air intake.

help repairing ASUS MeMO 7 Micro USB charger port

12 more posts in this thread. [Missing image file: ]
Hey. this may not be the best place to post this, but i need some help sorting out a problem with my ASUS MeMO Pad 7 ME170CX-A1-BK I plugged it into the charger a few moments ago and, just as i did, it slipped from my hand, and instinctively lashed out to grab it. I caught it, but in doing so, i bent the micro USB plug in and also the connector inside. it will still charge, but i have to flex the charger cord to an uncomfortable position and keep it there manually to keep it charging. I managed to safely detach the back plate on the tablet and can now view the components, BUT the android micro USB port is on the inside of the of innards, sandwiched between the circuit board and the screen. There are screws holding it in place, but before doing so, i need to google if it's safe to remove without causing much irreparable damage. I cant post pictures, because sadly this was the only means i had of taking them, but i can post a picture of the exact model in pic related. I'll attempt to search for an internet pic of my model with the backplate removed. I also searched the web for the same issue as mine, but to no avail, so I've come here as a last resort. The best way i can explain it is like this: To get the device to charge now, I have to bend the micro USB cable toward the screen, not toward the circuit board on the back. Is this a simple case of pulling unscrewing the circuit board from the base and carefully bending the adapter port back into postion? the actual adapter itself seems to have suffered no bending out of shape. Any questions you have I can answer to the best of my abilities, i deeply apologize for not being able to take pics, this is my last resort before moving on to calling a tech support pain-in-the-ass, although i feel i'm being one myself. Pic related is my model of ASUS MeMO 7
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I want to put wheels like pic related on the legs of a pool table so I can move it out of the way when I'm not using it. Is there any way I could get them to lock in place so the table doesn't move around?

Building a Space-Shuttle Replica

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Hey /diy/, I'm looking to build a large, replica space-shuttle orbiter module to potentially hang from the ceiling of an arcade. My first and foremost concern is in regards to what sort of materials I should use for the inner frame and the outer shell respectively. The replica will be roughly 12ftx7ftx5ft, and I'm looking to keep it relatively low-cost. My main concern, however, is that I need to know what materials would be the most lightweight, but also the strongest for this application. It's just a simple display piece, meaning it won't be holding people, or anything like that, but it needs to be of relatively sturdy construction, in the event that we perhaps opt to add a few electronic effects to the rig. Any thoughts?
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what kind of bicycle lock is the best? I have seen people breaking even those big chains easily by hitting the lock part (where the key goes in) with a fucking stone or brick
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Currently reviving a dead car amp. Is this some new found capacitor i've never seen? Or is it a blown capacitor? Also is there anyway to know what value it is?
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Hey /diy I bought this bike yesterday. It runs fine but there is some rust on the chain, should I replace it or will it be alright? Is there anything I should do to service it? Any recommendations on replacing handlebars, etc This is a uni bike so it should be reliable but not flashy.

Soldering iron

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I have a lot of access to some okay brand tools. Living in Canada pays a price. Is a $60 soldering iron okay? I just want to make my own e cigs. pic related
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Hello /diy/ first time posting here. I want to to learn everything about construction and rebuilding houses and what not. In my country you call this job "Handyman"but i dont know if thats an actual job in your country and i cant find any other translation than that. I was wondering if anyone could tell me what tools i should start with, since i am collection tools of my own so i dont have to use my dad's stuff. I also was wondering if different brands for wrenches for example matter that much? I can buy wrenches for 5 dollars here and wrenches for 25, i dont know how to spot cheap tools.
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I ordered a Lulzbot TAZ 5 3D printer. I was torn between it and the Ultimaker 2 but ultimately went with the Lulzbot because of dual extrusion, direct feed, and the build volume. Did I make the right choice? Is there any other sub $3000 printer I should have gone with?
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i want to build a mini 7" screen arcade cab and I already have the stuff do to it but currently I'm using a Raspberry Pi B+ and would like a similar sized board but with more power for emulators. Any suggestions?
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What are some good books to get me started with HVAC/R? What aspect of HVAC/R should I start with that would be the most fundamental learning point for an absolute beginner?

DTMF

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DTMF (Dual-tone multi-frequency) can send a symbol. The symbol can be 0,1,2,3,4,5,6,7,8,9,#,*,A,B,C,D (16 diferent symbols) 16 symbols = 4 bits Whats the fastest I could send DTMF tones over an Analog Radio? So far, there is this site where it says you could send 20/5 ms tones. 20 miliseconds tone duration and 5 miliseconds pause. It sounds like this: http://www.genave.com/audio/dtmf-genave-superfast-20-05-1646347904.wav Assuming that is correct, I could send 40 symbols per second. That's 20 bytes per second. Since this channel is unreliable, I must also add some sort of Forward Error Correction (Redundancy, Hamming or any other FEC), so this will reduce those 20 bytes per second to something near 15 bytes per second. I chose DTMF since there are a lot of libraries to encode (just send tones) and decode (Goertzel algorithm), but is there SOMETHING ELSE? I alredy own like 50 analog radios, and there is no digital comunication between. I want to send "documents" as long as 500 bytes. The longest document I will ever send will be 1 kilobyte. It would "theorically" take 51.2 seconds to send 1 kilobyte over DTMF without any sort of error correction algorithm, this is WAY to long. What else is there? I have read there is 1200 bps using FSK, but so far I don't see any documentation on it. Which frequencies could I use and so on. Also, I can't use anything that uses PSK or QAM, since I am using an acoustic coupler, and the phase can change with any small vibration on my device. tl;dr: I want to make my own acoustic software modem, but I want something faster than DTFM @ 40 symbols per second. It needs to work over crappy analog radio, using an acoustig coupler (aka, putting my device near the speaker) I will be implementing this on pretty slow WINCE terminals with .NET
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I was looking into DC freezers for my off grid solar system, but they are super expensive. 600+ for a small 2.7 cubic foot freezer. Would it be possible to build my own? Maybe salvage some parts from a regular freezer and replace the compressor with a super efficiency danfoss one or is it to complicated?






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