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Computers - The Best of Instructables Volume 1

Projects from the fifth chapter of The Best of Instructables Volume 1.

The secret behind the computer's success is its generality. With the right suite of sensors, software, and actuators, a computer can do virtually anything! The computer projects on Instructables are a prime example. Here is a smorgasbord of the practical, the playful, the creative, and the just plain weird. The best lesson I've learned is that, despite the power of computers, computer skills alone will not make a project fly, crawl, dazzle, or impress. You must combine these skills with solid electrical and mechanical engineering and couple that with your own creativity. Don't stop at hacking just the ones and zeros, keep going until you're hacking the physical world itself!

- argon


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183 comments
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Jun 23, 2009. 11:45 AMbernice says:
I know this is OT but I need an answer to my computer problem, I have a compaq running window's xp and I have maxed out it's memory to 4 Gigs. I was told that my cd/dvd writable drive will need to be replaced and last week I purchased an internal drive and was told it's super easy to install. They were right it was easy to install and I did set the dvd/ writable drive to slave as suggested. When I set the computer all up, now I can't get anything on my screen, it's just blank no sound no nothing. I have everything plugged in correctly and the computer is running and the monitor is working but nothing is connecting. I even took the new drive out and put the old one back in and the computer is still doing nothing, none of the windows programs are loading nothing is loading. What in the world could have happened just by changing a drive. I was never able to load the drivers to the new drive because the computert never booted up. Any suggestionds would be helpful. Bernice
Jun 27, 2010. 1:16 AMMavamaarten says:
Make sure all cables in your PC are connected well, most likely you disconnected a cable (not intentionally). Is your PC Beeping ? If so, look up the beep codes (short - long).
Jan 3, 2010. 3:45 PMdaemonsan says:
 You static shocked something inside your computer. Did you replace this drive while
1. Standing on the carpet
2. Wearing wool
3. Being ungrounded
4. etc.

Basically if everything is wired the same as it was before you opened the case, and now it doesn't work, it's because you discharged static electricity into your computer. Since it won't boot at all then you, in all likelihood, staticed the motherboard and it will have to be replaced. If it is a branded computer (e.g. Dell, HP) then the cost to replace the proprietary motherboards is going to be rather large, since opening those cases voids the manufacturer warranty.
Dec 28, 2009. 10:23 PMLee Wilkerson says:
I just remembered something else. You could get such a response if the power supply voltages were sagging.
Aren't hardware issues fun?!?!?
Dec 27, 2009. 5:01 PMLee Wilkerson says:
Yeah. Unplug your RAM and reinsert (with power cord unplugged). Next, do the same with IDE cables and floppy cable (if there is one). Also check the Mother Board Power connector.
May 12, 2010. 2:47 PMPrimeval says:
Possibly, you have knocked your IDE connector out of your Master HDD and thus it cannot access the HDD ..... Check all conections , twice! I bet it's a simple jumper problem or a loose cable.....course you could have discharged static but i think check ALL cables to HDD and motherboard to ensure they are connected correctly.


Best of luck,

Primeval
Dec 10, 2009. 1:05 PMddavel544 says:
Bernice, save yourself alot of time and money....buy a refurbished Dell Optiplex GX280 desktop PC from ebay, comes with a DVD/CD burner and 4Ghz processor, and a fully maxed out memory, also has Win XP Pro for about $200 or less.
Jan 3, 2010. 1:24 PMddavel544 says:
Sorry Bernice....you should listen to Lee Wilkerson or willrandship below this comment...they may be right. As Dell seems to have a odd arrangement  regarding their product.
Dec 27, 2009. 5:04 PMLee Wilkerson says:
I recommend you leave the Dell alone or you will be saying, "H***!" At least find a refurb Compaq or HP. Maybe even Gateway.
Jan 3, 2010. 11:11 AMwillrandship says:
Personally, I like to build my own pcs altogether. That way I choose exactly what I want and nothing else.

of course, since I'm poor, the only parts I get are salvage, so I don't really have much selection. I find hard drives least common, since people keep them in upgrades to new pcs and give me fully functional old ones with no hd.
Jan 25, 2010. 11:30 AMzack247 says:
i agree. building your own pc is much more fun (in most cases). one of the computers i built was running xp, and then one day, nothing. i must admit though that it was a 1995 motherboard, with 256mb of ram, (yes 256mb, laugh it up) and windows xp installed. now i have built a new one, using the same ram as the old one, only with a mobo that has more than the keyboard slot integrated. works great too. if only i could find someone with some ram...
May 12, 2010. 2:53 PMPrimeval says:
Yes, building a new pc is not so expensive if you use last year's top products, you'll end up with a top of the line pc that will last you ages and will give you satisfaction everytime you boot it up!!!!!


It's great fun to do and you can do it to your own spec, just ensure everything is compatible, though  ATX case for ATX motherboard, a good enough power supply 400W plus, you can add what YOU want, too, any specialist items like sound systems for recording or creating your own studio, multimedia pc or whatever you need.......IT'S GREAT FUN!!!!!
Jun 27, 2010. 1:17 AMMavamaarten says:
Yeah it is. Also, if you build your PC yourself, just change / upgrade what you want. If you bough your PC in a store they always whine about warranty
Jun 28, 2010. 10:05 PMwillrandship says:
not to mention some companies cough*dell*cough make their motherboards reject all brands of ram besides their own.
Jun 29, 2010. 12:58 PMzack247 says:
my 4500 doesn't, i upgraded it with the 512 of kingston
Jun 27, 2010. 11:06 AMzack247 says:
totally. once my friend didn't take his computer to a store for upgrading the ram, and when the hard drive blew out they wouldn't replace it. he paid 2000 for the thing! and yes primeval, there is so much more satisfaction in your own build than in one bought from the store
Apr 2, 2010. 9:52 PMbowmaster says:
I have a laptop from ~2007-8 with 256mb of RAM. The desktop I'm typing on right now has only 512 MB of RAM.
Apr 2, 2010. 10:55 PMzack247 says:
well, that desktop is better than mine! (not te one mentioned above^^) i have a dell dimension 2400 with 256mb. trackmania runs sooo slow
Apr 3, 2010. 4:41 AMbowmaster says:
Yeah, but I'm trying to do online gaming.
Apr 3, 2010. 8:59 AMzack247 says:
me too. how come all the good stuff is expensive? i need a ram upgrade BAD. it takes a couple minutes just to open the internet! and as for my laptop, a snail runs faster than it does! it takes the thing 5 minutes just to open the internet explorer, another 5 to load a webpage.
Apr 3, 2010. 9:27 AMbowmaster says:
I'm saving up to buy an Alienware M15x with 8GB of RAM. All 5 computers in my house only add up to ~7GB. It's going to be amazing.
Apr 3, 2010. 8:46 PMzack247 says:
wait-- just upgraded to 512 of kingston. i have a compaq presario with 512, but i have to get it working first.
Apr 5, 2010. 7:15 PMwillrandship says:
Nice, but even that won't get you very far nowadays.
Jun 27, 2010. 11:07 AMzack247 says:
well, i upgraded to a dimensiion 4500, with 512mb RAM, a 64mb agp card, and a pentium 4.
Jun 27, 2010. 7:39 PMLee Wilkerson says:
I don't wish to offend you, but I can't help but wonder if they didn't misspell that and it should have been Dementia.
Jun 27, 2010. 8:57 PMzack247 says:
sorry, i meant you CAN'T trust passive cooling
Jun 27, 2010. 8:56 PMzack247 says:
yeah, i think they may have failed a bit on terms of cooling, i added a extra fan just in case, you can trust passive cooling
Jun 28, 2010. 8:51 PMwillrandship says:
i've seen some (dead) computers so old, the passive cooling heatsink was smaller than the processor itself. Now that's a cool-running processor! I don't think I'll ever be able to trust running with just a heatsink on todays models, even the atom.
Jun 28, 2010. 9:43 PMzack247 says:
adding on: this passive cooling heatsink is on a pentium 4. the video card was hot as well, but that was solved by putting another heatsink with a heat distributing pad on the back of the card behind the chip. now it runs cool, i think i might make an instructable!
Jun 28, 2010. 9:41 PMzack247 says:
i have found that the pentium 1's run extremely cool, whilst the celeron or even a pentium 3 run 30 times hotter. i have a powerbook 190, and it hardly has a heatsink! a thin plate of metal is all its got!
Apr 3, 2010. 11:20 AMwillrandship says:
I just got a 64MB MMX II-300 yesterday! It has a 5.25" floppy! ye old computer!! It shall run DSL
Apr 5, 2010. 9:06 AMLee Wilkerson says:
I have a recommendation for that 64MB MMX II. Install Linux on it and then benchmark it against a Winduhs machine. B)
Apr 5, 2010. 2:59 PMbowmaster says:
Yeah, BM it against an Alienware M15x running Windows 7.

MMX II-300 score: 2
Alienware M15x score: We are sorry to inform you, but no number exists to describe how well it did.
Apr 3, 2010. 8:48 PMzack247 says:
if it can handle it. what year be this beast? i know that at least 1994 computers can handle xp.
Apr 5, 2010. 7:12 PMwillrandship says:
Actually by DSL I meant Darned Small Linux, the 50 MB Debian based distro, but it is having serious issues with grub. I'm not sure why.

I Loled at bowmasters comment.

This will never run windows ever again. I saw how bad 98 was running on it and just said No. Can XP Really run on 64MB of ram?
Jun 5, 2010. 1:44 PMKaydenST says:
Look at THIS
Jun 5, 2010. 10:46 PMbowmaster says:
Wow, that's nice.
Jun 5, 2010. 4:32 PMzack247 says:
wow thats... thats... im at a loss of words to describe how awesome that is.
Jun 6, 2010. 12:30 PMwillrandship says:
Umm, DSL runs with 50 MB Hard drive space, though. But that is impressive. How big is the paging file size?
Apr 5, 2010. 9:01 PMzack247 says:
maybe not 64 mb, but 128 would be possible. it would probably be REALLY SLOW, but it just might work. but i think linux or ubuntu is the way to go for this. besides. a totally modern looking os running on that dinosaur? it would be just likthat mac os x computer that won the contest! it would be awesome!
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