Homebuilt AC

Hello again everybody, bwpatton1 here with another one of his strange Ideas..... not as dangerous this time. Well, we built a gameroom, and currently it has a 10000 BTU window unit, in the South Texas summer it has a hard time keeping up, it also uses 900watts, well 900watts by itself isnt bad but we have two of these b/c we have two floors. I was wondering if i could build an AC to help supplement the run times of these AC's. My idea was to get an old refrigerator (and keep it outside) and run copper tubing through the freezer and into the refrigerator area and out of the refrigerator. Then, run this copper tube to a copper coil with a blower fan. Sound good sofar? Then I would run the end of the tubing back to the top of the freezer, somewhere in there there would be an inline pump somewhere............ OH and the lines would be filled with water/antifreeze??? Does anybody think this would be efficient enough to build? Or am I just wasting my/your time Diagram- the thing to the left is the refrigerator, and the squiggles are copper coils, and the thing to the right is a blower/coil. You were supposed to be able to read the writing on the diagram but the camera wouldnt cooperate

Posted by bwpatton1 9 years ago  |  last reply 9 years ago


Homebuilt AC unit???

Hello again everybody, bwpatton1 here with another one of his strange Ideas..... not as dangerous this time. Well, we built a gameroom, and currently it has a 10000 BTU window unit, in the South Texas summer it has a hard time keeping up, it also uses 900watts, well 900watts by itself isnt bad but we have two of these b/c we have two floors. I was wondering if i could build an AC to help supplement the run times of these AC's. My idea was to get an old refrigerator (and keep it outside) and run copper tubing through the freezer and into the refrigerator area and out of the refrigerator. Then, run this copper tube to a copper coil with a blower fan. Sound good sofar? Then I would run the end of the tubing back to the top of the freezer, somewhere in there there would be an inline pump somewhere............ OH and the lines would be filled with water/antifreeze??? Does anybody think this would be efficient enough to build? Or am I just wasting my/your time Diagram- the thing to the left is the refrigerator, and the squiggles are copper coils, and the thing to the right is a blower/coil. You were supposed to be able to read the writing on the diagram but the camera wouldnt cooperate

Posted by bwpatton1 9 years ago  |  last reply 9 years ago


can anyone help build a basic computer?

The fact is pictures use 24 bits. It is not simple to use available microprocessors to make a computer at home. Way too many pins Well I think that a z80 microprocessor and two 8 bit presettable counters could deliver a picture with 24 bits. Did anyone really ask for microsoft? What task would you work on? Example number one 1)  computer division : this is binary number division with check in the loop  that you just drew up. The microprocessor only has about 125 commands that you write down.  A command can be as simple as jump to line 0000 0000 0000 0000 . this can be a simple loop that has to be done or the chip is scrapped.  The number 2)  Is there a picture chip like the commodore 64 has?  Find one. An easy chip.   3) Are there any monitors left?  Did any one ask for those  sounds microsoft has ? Most people should have figured out apple computers earlier.

Asked by halamka 6 years ago  |  last reply 6 years ago


Feedback for my website?

After a couple of months of building my website, it is finally in a state where I am proud of it! However the people using it are my friends, and I need some fresh eyes for feedback. Basically it's called Come Clean, and you make confessions to get them off your chest. Simple idea really. So please visit my website and tell me what you think: http://www.comeclean.co.nz       If you think something is good or bad, or if you spot a bug, leave a comment :) Thanks!

Posted by asasklfjklasfkljasklfjaklfsjkl 7 years ago  |  last reply 7 years ago


What sort of servers and software handle Instructables? Answered

Instructables is a pretty big website, so it must require a lot of resources, so my question is what handles the day-to-day running of the website? Linux or Windows? IIS or Apache? Homebuilt servers or HP servers? etc.

Asked by asasklfjklasfkljasklfjaklfsjkl 8 years ago  |  last reply 8 years ago


Homebuilding of experimental aircraft?

Hello Instructables I am a professional aerospace engineer who homebuilds aircraft in my garage when not doing so for work.  I live and work at the Mojave Airport which is a hotbed for aircraft homebuilding stretching all the way back to the 80's.  The experimental aircraft community does not have anything like what you all are doing on this website.  When I found your site the first thought was that I had finally found the place to talk about buillding airplanes.  But I see no such topics on the site.  While fundamentally I assume the problem is only that the channel has not yet been created or there is a liability problem, I wonder if there isn't more to it.  Is the thought of designing and building and flying your own airplane not as awesome for others as it is for those of us who live in Mojave?  Is there something that can be done to make this exciting world more exciting to people (like yourselves) who take such pride and make such investments in doing cool stuff in your garages? Elliot Seguin Wasabi Air Racing Nemesis Air Racing Scaled Composites

Asked by ElliotSeguin 7 years ago  |  last reply 6 years ago


Could someone make an instructible for a homebuilt version of DARPA's PowerSwim?

Hey! Could one of you amazing builders/innovators/homebrew engineers out there take a crack at reverse engineering and ghetto-fying DARPA's PowerSwim project? there isn't much on it but you can get some good google images of it. Apparently it uses "shed vortex's" to propel swimmers up to 150% faster than normal swimmers and it looks incredibly simple.

Asked by mrguy19187 8 years ago  |  last reply 2 years ago


What should I use for a hovercraft fan?

I have all the necessary building materials (wood, plastic tarp, foam, etc...) as well as a 22 hp engine and a weed whacker engine (both gasoline). I'm having trouble figuring out what i need in terms of a lifting fan. I've determined that i need something that can provide at least 4000cfm. I've looked at industrial shop fans 20+ inches in diameter which seem to provide enough airflow to work, but I've never seen them used in my research. Can anyone help?

Asked by Transience 9 years ago  |  last reply 5 years ago


flat wheel barrow ? Answered

 Our "contractor" wheel barrow with inflatable tires commonly picks-up nails and goes flat. The semi hard sponge rubber replacement seems expensive and I have been wondering what might be homebuilt design. Latex caulk is cheap but don't think it would dry if trapped in a tire. Super ball material or similar would seem to be valuable.  

Asked by nowj 8 years ago  |  last reply 4 years ago


Railbiking. Anyone built one?

I heard an interview today with author William Least Heat-Moon.  In his latest book, he meets a man who has built an outrigger bicycle he calls a "Railcycle", which he uses to ride on disused railroad tracks all over the world. Curious, I did some searching, and found a number of places on the web where people are talking about this, but they all seem outdated. Bentley Railbikes Railbike Tours Homebuilt Railbike Has anyone else heard of this practice?  Do you know of anyone currently making and riding such contraptions?  Do you have one of your own?

Posted by yoyology 8 years ago  |  last reply 10 months ago


solar powered cooler

Using these ideas as a starting point:http://en.wikipedia.org/wiki/Icy_Ballhttp://en.wikipedia.org/wiki/Einstein_refrigeratorhttp://en.wikipedia.org/wiki/Gas-absorption_refrigerator"Another variant uses air, water, and a salt solution. Warm air is passed through a sprayed solution of salt water. The spray absorbs humidity from the air. The air is then passed through an evaporative cooler. Humidity is removed from the cooled air with another spray of salt solution. The salt solution is regenerated by heating it under low pressure, causing water to evaporate. The water evaporated from the salt solution is recondensed, and rerouted back to the evaporative cooler."Directions on how to make an icy ball. URL works occasionally.http://crosleyautoclub.com/IcyBall/HomeBuilt/HallPlans/IB_Directions.htmlhttp://blog.modernmechanix.com/2007/07/19/refrigerator-uses-solar-energy/Is a non-flammable, non-toxic, and low pressure version possible?

Posted by beforethought 10 years ago  |  last reply 2 years ago


Homemade hydro excavator?

I recently stumbled onto a website that sold a special hose and powerhead that allowed a typical pressure washer to be used as a sewer jetter (unclogging sewer lines).  I was blown away.  So simple.  Pure genius. Then it occurred to me:   A standard pressure washer could be used as part of homemade hydro excavator -- a digging tool that liquefies soil and removes it with a vacuum.  These machines can excavate around pipes without damage and make surgical-style incisions in the earth. Very precise. Very fast.  Factory made hydro excavators are *very* expensive and they typically rent for $350.00+ per day.   To turn a pressure washer into a hydro excavator, you'd need an economical homebuilt vacuum tank to suck up the liquefied soil and a vacuum hose attachment for the wand.  The excavated liquefied soil is very heavy -- so weight considerations and spoil removal are engineering issues to work on. So ..... anyone know how to build an economical vacuum tank?  

Posted by eric1967 7 years ago  |  last reply 7 years ago


need good battery options... help?

I've got a bit of a confusing circuit going on, and I need to figure out a good battery option. The battery pack must supply 9v@400ma to one connector (2x 2.4ghz video receivers in parallel with each needing 9v@200ma) and 6v@1.6a to the other (2x portable LCD TVs in parallel with each needing 6v@800ma).If my calculations are correct, I'd need a 9v battery that puts out 1.5a to support the whole kit & kabootle. I'd like a minimum of a 2hr run time, so we're talking 9v, 3000mah)I need it to be rechargeable, with the ability to run the system while charging from a dc adapter.Assumedly, I'd also need a DC/DC transformer from 9v to 6v with as little loss as possible.Can anyone point me in the right direction for batteries, chargers, and transformers? Either (relatively easy) homebuilt options or pre-made options are good.also, what are the pros and cons to each option (if you know)?any help would be greatly appreciated

Posted by gschoppe 11 years ago  |  last reply 11 years ago


RF Development Kit-Advanced, but could be a lot of fun

Micrel SemiconductorEbay{{{ I have noticed that some people are concerned that due to surface mount technology you can't make electronic stuff anymore. It is not true. A search will quickly find forums discussing how homebuilt electronics experimenters are getting around this. I have a nifty RF development kit for sale on ebay. See ebay link below. These development kits are used by new product developers to quickly get their RF prototypes up and running to develop software, hardware and firmware without the steep learning curve associated with starting development with discrete components. These boards allow you to build custom devices that can comunicate with each other up to a mile apart. Although this is not quite ham worthy distance someone might be able to have some fun with the kit. I have just one, but more (and the actual rf chip) could be acquired through Micrel Semiconductors. Anyway, I have this listed as an industrial item, so I am not sure the right people will see the ad. For those interested in playing with current technology RF.}}}

Posted by fordmodelb 12 years ago  |  last reply 12 years ago


Recumbent Riders?

Just curious if anyone else here rides a 'bent. I've just been getting more and more excited as I continue looking for my own :) I'm currently in the market and have test rode a Bacchetta Strada, Volae (something or other), Rans Rocket and a no name unknown import SWB. I'm also waiting to hear back about a partially built M5 frame (think "sports car" class of 'bents). And don't forget my homebuilt abomination :D Today I rode a no name something or other found on Craigs List... In my home town too! It's not exactly what I'm looking for (it's too recreational for me), but almost exactly perfect for my father. It's got absolutely garbage components, but I see potential in it. It is, however, a dog on weight - ~40 pounds. But that's not an issue because there's no hills :D The seat is also a POS, so never mind the makeshift seat back made from bike inner tubes. <--- totally awesome by the way. But I think with a new seat, some cable management, better handlebar/stem and at the very least - new shifters -- it will be fun, reliable and a more road worthy 'bent. The price was right for this thing too :p Cheaper than an upright from walmart :D

Posted by trebuchet03 11 years ago  |  last reply 11 years ago


Are you to blame?

OK, I know it's a deliberately attention-grabbing topic name. Sorry about that.There was a post on the Bamboo bike frame, essentially saying "a disclaimer that this could be dangerous isn't enough; people aren't qualified to judge the strength of their homebuilt bike frames so might still get hurt even if they are careful", which attracted a lot of ire, but also a response from whiteoakart reframing the question, thus:As a maker and writer of an Instructable, what is your responsibility to keep your readers safe? How far does your culpability extend?This is obviously a knotty issue, and one that seems to have a range of attitudes across the board- some people say "pointy things are pointy, hot things are burny, don't hurt yourself" and leave it at that, some people list all the grievous injuries possible from their Instructable.In my opinion, there are two major things to consider:Is a person likely to do themselves harm even taking reasonable precautions?An Instructable on how to weld, with clear advice on breathing protection, eye protection and not electrocuting yourself should be "safe"An Instructable on free rock climbing, even with all the advice in the world about how to climb well, could easily get someone killed because free climbing is inherently dangerousIs the intended audience capable of accurately assessing the risks? The risks of a table saw are obvious- put your hands in the wrong bit and it will cut them off- but the risks of high-voltage electrics are harder to judge with simple "common sense" because a seemingly minor fault could be lethal.Both of these have an element of "reasonable" to them- if you make your instructions foolproof nature will give you a bigger fool, but there is a point at which it is reasonable to assume that a sensible person following your instructions with care and attention will not injure themselves.More thoughts?

Posted by PKM 9 years ago  |  last reply 8 years ago


Powering an Android Tablet without a battery?

So I bought my sister this Visual Land tablet about 2 years ago. Eventually both the mini usb and charging port broke off from the logic board as expected from a cheap product. So I have this nice idea of using the tablet as a car nav/entertainment system. simply get rid of the battery and push 5v via a standard cigarette light usb adapter or make one with some 5v regulators and done. I tried resoldering the charge port. I get 5.23v on random points on the board but I get 0v at the battery with the charging port connected. I pulled the battery and tested the terminals on the board with the charging port connected no battery, 0v at the board and the battery alone is also 0v most likely dead and trash as it sat for 1.5 years in a shoebox untouched. So I pulled out my homebuilt psu power supply and hooked up the variable output to the battery terminal on the logic board. When pushing 3.7v~ I can get the first splash screen to show up but the tablet shuts off right after. When pushing 3.8v any thing higher the first two splash screens show and android starts to boot but the tablet powers off soon after.. So i decided to risk it and pushed 5v directly to the board. It started up fine and booted into android normally except for the low battery issue and some heat coming from the processor. Maybe a heatsink and rigged laptop fan into the casing could fix that? It shut off normally as if it had a dead battery. How much voltage doeas a generic android board need? Current?Does the board take 3.7v but since theres no battery it wont boot? How could I fake a fully charged battery? Or could I possibly flash a custom rom? Do you guys need more info? I could provide more pics Note that the battery is a 3.7v 3500mah li-ion battery with only a positive and negative hookups. Also i took some tape and covering off the battery to see if it possibly had its own controller board. It did have a small  pcb board but it seems that its only "a transfer" board, it takes the power from this cloth like cable and passes it into the wire thru the pcb. Should I try to hookup 5v straight to the battery to test it out? Battery has 0v so it might be useless.

Asked by mcarrascoza 3 years ago  |  last reply 3 months ago


Ch. 1 In which SHIFT! comes to Instructables and is very excited to begin

Hey Instructabrarians, So here I am.  Headquarters of Instructables.  In 82cd Second St, San Francisco.   AND IT'S FREAKING AWESOME! Seriously, I still can't believe I get to come here every day!  While the outside may appear small, the entire facility is huge.  Immediately upon entering the building you are greeted by a long  ascending brick encased stairwell, which gives a very good impression of a classic London bookstore, which lead up to about a 15 foot high rise above the SF Streets.  Then, at the top of the stairs the whole building unfolds to reveal the entire HQ of Instructables, a place where you can instantly tell there's always something new going on.  It's quite filled with different projects, and various workshops that decorate the interim of the facility.  Exactly like an oversized engineering student's dorm room might look.   This place is amazing!  As soon as you enter you can immediately tell this is a place where DIY and homebrew are the norm.  Each room is actually organized like the Category section on their site- they've got a Kitchen for Food and Cooking, an awesome Workshop (complete with Laser Cutting Printer), Electronics and homebuilt ardruino Robot table, shelves filled with Arts and Crafts.   As a huge fan of the site I couldn't help but point out how many classic 'ibles I recognized.  Another awesome fact about instructables. While most companies would provide the usual simple shed or bike rack to employees, Instructables is smarter and more creative.  They hang their bikes on the wall. WOW.  I can say I never would've thought of that. Even their bathrooms are awesome- they decorated one of their doors with a Portal Cake sign! Honestly that alone is worth several points on the TV Tropes "So Cool It's Awesome" factor.    And I haven't even come CLOSE to describing the rest of the facility!   However, most important to me, is that the people are so friendly.  I was really worried about my first day job, but everyone was extremely nice and welcoming to me and I can't wait to begin work!   But the truly best part is that they're not just awesome Instructabrarian Employers, they themselves are also huge fans of the site and have their own personal instructables.  Tuesday is show and tell day where everyone presents something new they're working on and I can't wait to see it!  They're also completely understanding and are even giving me some time to work on my DIY PIXAR booth for the Maker Faire!   Thanks!  Anyway, today is Wednesday so not a ton of people are in today.  Luckily I got a chance to talk with Instructables gurus such as Sarah, Christy and Eric Wilhelm (yes, THE Eric Wilhelm!).  Right now a NBC new crew, or is it CBS?, is filming a special report on Fenix on their latest project- a portable power generator for the Middle East!  Overall, this is such an amazing introduction for me.  I'm still totally geeking out about all of this and I hope this dream doesn't end soon! -ME PS I'm sorry if I forgot to mention anyone.  Also, 3-DMO (my N3DS) pictures will be uploaded on my flickr site soon.

Posted by SHIFT! 7 years ago  |  last reply 7 years ago