Cheap LED's in your backyard

I was reading another post from last year and got the idea to go to walmart and check it out.  Sure enough I found LED's on sale (after christmas sale).  I figured I would have to buy strings of them, but they had the replacement LED's on sale at 37 cents for a 4 pack.   After tax it comes out to just under 10 cents each, which isnt as cheap as you can buy them from online suppliers, but its a lot less expensive than paying radio shack 80-1.25 cents apiece!   I got a bunch of white and colored (Red, Blue, Yellow, Green).   I think I bought around 60 packages of them (240 LEDS).   I'm going to go back tomorrow and see if they will give me even more of a discount if I buy them all!  They are easy to remove, just unbend the leads and pull them out!   Now I have to figure out what the voltage and amperage is, since it doesnt list it on the packs.

Topic by pennsteve 9 years ago

Cheap vision system for a robot Answered

I need to make a cheap vision system for a robot (low cost is one of the main points of the robot).  I have seen some, but most require a computer on the robot, and if they don't, they are expensive and bulky.  Is there a way to modify a webcam to get it to work?  Or is there any other ways?

Question by JaredsProjects 9 years ago  |  last reply 9 years ago

Cheap Eyeglasses - No, it isn't SPAM

Ok, first off, this isn't SPAM - I'm not advertising, just trying to figure something out about this company.Zenni OpticalThey sell glasses starting from $8! Glasses from a local glasses retailer cost around $120, at least! How can they afford to go down that low, compared to other stores? Is it their method of production, like they use different, cheaper materials? I've order 2 pairs off of their site, one regular, one sunglasses. I'll be awaiting the results. Still, it's crazy how low they can go, or how overpriced local stores are.

Topic by Bran 11 years ago  |  last reply 7 years ago

How to Build an amplifier for cheap?

I am a 17 year old teen with little pocket money and a beginner. I want to make an amplifier which can amplify an 8 inch subwoofer, two 8 inch speakers and 2 tweeters.

Question by adarshnarsaria 5 years ago  |  last reply 5 years ago

Cheap High Speed Camera

I've had this idea about a cheap high speed camera using say 10 of those small action cams, like this:;=item2a16846d30#ht_4895wt_952 What you would do is hack the Start/Stop switch and hook it up to some sort of controller that starts each one of these 10 cameras about  3.3 milliseconds before the next one, thus having each frame from all the cameras to be 3.3 milliseconds apart from each other, which is 300FPS at 720p for $158. The cheapest HD 300fps camera....   EVER, not that i can make it. The cheapest equivalent is around 2K.

Topic by williamp321 7 years ago  |  last reply 6 years ago

Cheap Island Building possibilities

Hello! Ive been doing all kinds of research and planning on making man-made islands for a few years now, and I had a thought on one method inspired by Thinkenstein's Instructable on Trash Rocks. He has been able to make floating rocks using plastic bottles filled with air, nylon fishnet bags, and covering the combination in cement. Tadaa, Floating Rocks. But after seeing his instructable about this, would anyone think it to be possible to make a large floating land mass using plastic bottles of 16oz and above, nylon fishnet bags, and cement? I think it sounds doable, but that's just whats been put on paper.

Topic by EngineerJakit 7 years ago  |  last reply 7 years ago

Where to get a cheap extruder? Answered

Where is the cheapest place to get an extruder for a 3D printer?  It must be premade (preferably a DC motor, not a stepper), and cannot require that I buy separate 3D printed parts.  Unfortunately, I cannot use Ebay, however, I can use most other online retailers.  It must be below $50, and if thats not possible, is there any way to make one with commonly avaliable parts (no 3D printed ones or milled parts), also cheap?  It does have to be fairly small, but need not use the premade spools of plastic, if an epoxy or solething else exists that would also work. (and I have already seen the glue gun extruder instructable here, that is far too big and heavy)  I know that most of this is a long shot, but I'm hoping someone knows/has heard of one of these.

Question by jduffy54 6 years ago  |  last reply 6 years ago

The best cheap pocket knife? Answered

Ok, I need you guys help. I want a folding pocket knife that is in the price range of $0-35 bucks. I want it to be tough for every day use and possibly heavy abuse. I also need it for scouts. Can you guys help, Thanks.

Question by Thelonelysandwitch 9 years ago  |  last reply 3 years ago

Cheap rentals in PROVO, UT? Answered

Moving to Provo in a week. I have some friends that rent a two bed. 1 bath for $450/mo. I'm looking for a 2 bed. but cant seem to find anything near that price. Does anyone know of a place that's at least $500/mo.??? I need to find something quick.

Question by Spaceman Spiff 9 years ago  |  last reply 9 years ago

Cheap ride for dirt roads? Answered

 I need a cheap but durable ride for dirt roads. What should I use. It doesn't need to go very far.

Question by Epeoples 9 years ago  |  last reply 9 years ago

Howto make a Cheap partybutton Answered

How to make a cheap party buttonThe stuff i have.Usb Game controller* Winamp / Windows media playerA laptopA Remote controlled power switch (2x)?

Question by Fox.did 10 years ago  |  last reply 10 years ago

Looking for a cheap 3D printer

Hi! I am looking for a cheap 3D printer that is easy enough to set up for teenagers.Could anyone give me some suggestions?Thanks a lot!

Question by Laney02 2 months ago  |  last reply 8 weeks ago

3D printer for cheap beginners?

         I am a person that is cheap. I want a 3d printer assembled or kit that is cheap, reliable, and that doesn't print high quality (it coul print high quality, but for $'s sake it doesn't have to). Any info helps, but remember, i'm a nube, so don't criticize please.                                                                                                                                                                                                       thanx,                                                                                                                                                                                                       theboygenius I forgot too mention, >$350 if possible

Topic by theboygenius 6 years ago  |  last reply 6 years ago

cheap ideas for a sand box? Answered

  i   have a   small yard , 2 boys , and  we   rent  so  nothing   t perement

Question by chantellepolson 9 years ago  |  last reply 9 years ago

Good Cheap soldering Iron?

Anyone know of a good, yet cheap soldering iron? I like the pen variety, not the gun type. My current one is a pain because it doesn't have a regulator, so I have to unplug it once it gets hot... or it gets WAY to hot. Sorry if there is no-such-thing...

Topic by zachninme 12 years ago  |  last reply 7 years ago

idea for a cheap graphics tablet

I thought of an idea for a cheap graphics tablet type devicefirst read these 2 pagescathode ray timinglight penthe idea is to find a way to rig up a light pen(i don't think they sell them any more) and to use a cheap 5in b/w tv as the surface or mount a crt monitor in a cabinet at a drawing desk angle please give me feed back

Topic by clasic_traveller_diehard 10 years ago  |  last reply 10 years ago

Cheap rotary tools/dremels

What do you guys think about these? Are they any good? Im talking about the really cheap £5-£10 ($10-$20) ones. I've always wanted a dremel but I didn't want to fork out more than about £10. Thanks - Josh.

Topic by josh92176 11 years ago  |  last reply 11 years ago

Best cheap wireless communication?

Device x has a button and is 25 feet from device Y. Device Y needs to know when the button is pressed and activate device Z, but it has to be cheap and if I have a lot (A LOT) of these sets near eachother they still need to work without interfering with eachother. Best Solution?

Question by snowpenguin 6 years ago  |  last reply 6 years ago

A good cheap bass guitar?

I play guitar, and (try to) play ukulele. I have wanted to play bass for a while now, and I now have a guitar center giftcard. I think I may get a squier j bass, but im not sure. What brand is good, but cheap? It cannot be over 200 dollars. New or used is ok. I just want to know what bass is good to learn on and is cheap. Below is a metallic red Squier j bass.

Question by freeza36 7 years ago  |  last reply 7 years ago

Cheap Room Air conditioning

Hi, I have a burning question, I thought about combining a small fridge I have with a floor fan for cheap in room air conditioning. I'd appreciate your thoughts and suggestions on how to combing the two without hazards. Tho the fan is a bit bigger, in concept would do as well.   Thanks, Chen Cohen.

Topic by DragonFX 8 years ago  |  last reply 8 years ago

super cheap, mini valves?

Is it possible to get a TINY, cheap electric valve?  The idea is for a 3D printer that uses a huge array of tiny needles, each of which acts as an extruder, to 3D print stuff in seconds instead of hours.  My question is, could I use a tiny valve over each needle to allow or stop plastic? or would that be impractical/impossible?

Question by jduffy54 6 years ago  |  last reply 6 years ago

Cheap screws in UK @ Screwfix

If anyone in the UK is contemplating a woodworking project that involves wood screws at the moment, you should pop on down to Screwfix. They currently have packs of 1800 screws for £7. Bargain? YES!

Topic by Jayefuu 9 years ago

cheap aluminium for cooling transistors and such? Answered

I just saw an aluminium stair (costing bout €30~€40) and wondered why i couldnt cut it up, and use it to create a heatsink for transistors and stuff like that. would this make any difference with comercial heatsinks? only in terms of heat-conduction i know shape is a factor, but i'd like not to get into that, i could bend the cut-up stair or something

Question by godofal 8 years ago  |  last reply 8 years ago

Cheap lego lots, anyone? Answered

Anybody know where I could get a ton of legos for a good price? I earn 10 a week, so try to make it fit that. I'm making a post apocalyptic DC, to let you know. Thx, builder968

Question by builder968 9 years ago  |  last reply 7 years ago

Cheap mass solar energy

I am going on a trip to mexico to build houses for poor families. I was wondering, is there any solution to lighting where our team could make multiple packages that we could give to the families that would supply them with light, etc. ?

Topic by Twistman 10 years ago  |  last reply 10 years ago

Cheap Slot car track

I LOVE using slot cars. I HATE the price of them. Does anyone know where I can get some cheap slot car track. When I say cheap, I mean less than $60 for a good bit of track. I plan on slowly building up my main straight away(s) to be long so I can test speed. Any site or info would be nice. But' I'm also considering build the track myself. Meaning, I use a router and and a couple pencils and string to build it out of wood. I know it takes time but I'll have 2+ hours a day with nothing to do. Help? Anyone?

Topic by ry25920 10 years ago  |  last reply 1 year ago

cheap powerful electric engine? Answered

Im looking to make an electric scooter for a school project, and im on a bit of a budget. I need to know what kind of motor i can get to move a scooter with a person and electronic weighing around 150 pounds on it, while still fast enough to go around 10 mph.

Question by thekasspell 3 years ago  |  last reply 3 years ago

Where are the best/cheap servos? Answered

I'm looking for the most highest quality servos there is to buy. Or the cheapest.

Question by Alcreion 10 years ago  |  last reply 8 years ago

Making a cheap cheap projector?

I know that it's possible to crack open a "oldish" laptop or even a new one and remove the shielding around the lcd itself and shine a special light through it that's bright enough where you essentially make a lcd projector. I have a old toshiba satellite 2520cds with specs like a 2mb vid card, 96mb of ram, 4 gig hd, and a 300mhz amd processor. It runs somewhat fast, even for windows xp that I installed on it and plan to upgrade the hd down the road, but I wonder, would I be able to do the same thing with this? The screen is an older lcd that has that "motion blur" effect to it, so would it be worth it? Is there some way I could connect this lcd to my video card on my pentium 2 I have that would allow me to actually watch movies?

Topic by Punkguyta 12 years ago  |  last reply 11 years ago

Cheap High-speed Camera

Yes, I know, It's an oxymoron. I've always wanted a high-speed camera, but they are way too expensive. I was wondering if any of you fellow Instructablers have a high-speed camera that you've lost interest in, and are willing to sell for a low price. Alternatively, if any of you know how to make a cheap, high quality, high-speed camera, could you post an Instructable? Edit: I bought a Casio EX-F1 a while ago, and even made an iBle about it. I also have a bunch of videos here.

Topic by Spl1nt3rC3ll 11 years ago  |  last reply 2 years ago

Cheap Speaker Stand Help?

M'kay, so I just spent several hundred dollars on a PA system and am too broke to afford paying 100+ more for some stands. Anyone wanna help me out with making my own? I'm looking for something like this: item)

Topic by DakotaFloyd 11 years ago  |  last reply 11 years ago

Cheap Auto Range Multimeter? Answered

As the question states. Anyone know of a good, cheap, auto range DMM? The more features and higher ranges the better. I don't need true RMS, would like capacitance checking ability as I reuse a lot of used electronic components from stuff people throw away, and I always saw auto range as more of a convenience, not a necessity. I would like to spend as little as possible, as I'm sure I'll eventually burn it out on one of those used components, like I did the $20 harbor freight clamp meter I had.

Question by Dochide 7 years ago  |  last reply 7 years ago

cheap easy pyro detonators!!!!!

Get some silicon diodes 3 for a 1.99 at radio shack or cheaper online tape one to a match and ad 6 to 12 volts to it and after a few seconds it will overload and get real hot! then it with ignite the match which will then ignite the visco fuse. original idea from jolly roger creator of anarchist's cookbook

Topic by struckbyanarrow 10 years ago  |  last reply 10 years ago

Quick and cheap disposable receivers?

I want to make a lot of them for very cheap.. i want them to be small and simple and im not worried about security or anything between transmitter and receiver just want to make it able to work from about 100 feet or less.. They only need to be a one-channel momentary type.  i also want to be able to use different transmitters (*not worried about size of transmitter, but i want it to be portable*) to control them.. basically i want a bunch of clones of receivers.  Any suggestions ? Thanks in advance.. PS: I CAN solder

Question by jules15 8 years ago  |  last reply 8 years ago

Cheap LED, Batteries and magnets

Hi, I want to make a whole bunch of lowtec-throwies, just a simple version to decorate and take pictures here, not the ultra-bright highly magnetic kind.The problem right now is that 200-300 throwies with cheap LEDs would cost more then $100 if I get the parts at our local electronic store (and that without magnets)."besthongkong" has 1000 LEDs for $10+$10S/H (=2 cents each) but does anyone know another cheap source with a larger variety and colors of low cost LEDs, maybee even low current ones? Maybee even in Europe?Second thing: Batteries. Lithium cells are rather pricey at that quantity, and cheap button cells seem to do the job.I had a couple of 1,6v LEDs on two button cells with diods I had lying arround (voltage drop). It was not very bright but they still glowed a week later.I had a cheap 12 pack assorted buttoncell blister, and I found they seem to have even worse quality ;-) Idd probably have to use three or more and still throw some out.I remember an experiment using wire and coins, lemon juice or vinigar, which made a LED glow dimly. Any Idea how long before this DIY-Batery runs out?Third thing: Magnets!DX has 20 for less then $2. but I guess at that weight I could just magnatize some scrap metal and cut it into pieces. Thats about a third of the costs even with all the shipping :-)Anyone here that knows any other good site for LEDs, magnets and such that ship to europe?

Topic by schorhr 11 years ago  |  last reply 11 years ago

synchonized flash light for cheap?

Also posted in "burning question " forum Hi, I am looking for someone who could do an synchonized flash light such as this one but for much cheaper ;-) The challenge is on synchronizing the camera with the flashlight, if possible wireless. The light itself and the diffuseur are no real topic. The use of such devices helps a lot when taking pics for your I'bles or your ETSY shop if you have one. Thx B

Topic by BaptisteL8 2 years ago

Free or cheap CAD software

Hello makers! I have a list of requirements that I would love to have on a 3D software that is free or below $200.  Make Assemblies  Capable of inserting Sub-assemblies And flexible constraints Making drawings from 3D files like solid-works or inventor Similar controls as solid-works or Inventor. If you have any video links with demonstrations of the software performing these task that would be excellent!  

Topic by erik hansen 2 years ago  |  last reply 2 years ago

Cheap Alternative Nose Cones

I am currently working on a new idea in which the nosecone of a model rocket is made from wood putty. Here are the steps: 1. Make a a frame made from a thin piece of balsa. 2. Fill in the four sections with a generous a mount of wood putty or wood filler. 3. Sand using a rough sandpaper, then something finer 4. Attach a dowel to the bottom and add a screw eye Do you think it will work? 

Topic by TheBlackSharpie 9 years ago  |  last reply 9 years ago

Cheap Two Stage rocket

If you were to take two model rocket motors and remove the secoundary charge (that pushes out the payload) from one and possibly fill the rest of the cartrage with homemade propellant. if you put one cartrage ontop the other and secured it with a little tape, would that work as a two stage rocket. does anyone think that the flame would travel into the secound cartrage and the pressure would blow out the first cartridge. Just wondering if anyone tried this before and is still alive and happy.

Topic by Reeper 11 years ago  |  last reply 11 years ago

A question: cheap hearing aid

I know a 93 year old in a rest home. When her daughter threw her out of her house (really!) she didn't get one of her hearing aids. The one she does have is marginal. Buying new is *really* expensive, and she doesn't have any money (related to the process of how her daughter threw her out of the house -- she cried every day for 6 months. No kidding.). I don't have the thousands it would cost to make it right.Recently we gave her an old cassette player and some cheap headphones. She loves it because she can really hear the contents of the tape.I'm looking for a simple device, reasonably small, that has a microphone and can drive the headphones with adjustable volume. I'm thinking small (mp3 player size, not hearing aid size). Any ideas?

Topic by alames 11 years ago  |  last reply 11 years ago

Cheap eye glitter sealant?

I love wearing glitter on my eyes but hate it when it starts flaking off. Eyeshadows with shimmers and glitter particles are too subtle for the look I'm trying to achieve. Vaseline is too gloopy and so the glitter never stays in place and MAC's EZR is far too expensive for me. Topshop did a glitter sealant a few years ago but I've never seen it since. Anybody seen it in the shops lately? Does anybody have any other suggestions of how to keep eye glitter in place?

Question by Cupcake_Weezie 10 years ago  |  last reply 9 years ago

Cheap and easy digital tachometer?

I convert engines from weedeaters, leaf blowers, etc. for use on large model airplanes.  I use an aftermarket electronic ignition on the engines.  The ignition uses a Hall effect sensor and a magnet to trigger the CDI ignition.  I would like to build a digital tachometer that would use that same trigger.  They sell them for $25.00, but I thought it would be fun, and cheaper, to make one (or several) myself. Can anyone help with a circuit and parts list? Thanks!! vettebob

Topic by vettebob 7 years ago  |  last reply 6 years ago

(Cheap) Dedicated Hotkey Keyboard?

I'm doing a project where I need a device that can launch multiple programs from shortcuts on the desktop without a mouse or keyboard. I'd usually just get an external numpad and map the shortcuts to that, but the programs use the number keys, so I wouldn't want to map shortcuts to anything on the numpad.  I'm not exactly sure what to look for, but searching for "programmable keyboard" only returns a few (totally overpriced) results.  Does anybody have any ideas?  It doesn't necessarily have to be pretty, but that's always a bonus.

Topic by scott! 3 years ago  |  last reply 3 years ago

Cheap, sustainable or recycled stuffing

Hi all, I'm part of a project where we're making soft sculptures to cover a tree trunk. It's for a sustainable festival, so we have to be mindful of re-using and recycling in our artwork. The problem we're having is with stuffing. It's only a temporary artwork for 5 hours so I'm not too concerned with waterproofing, but trying to make the sculptures look good when stuffed with shredded newspaper, plastic bags or chopped up old clothes is difficult. I'd really appreciate any ideas you can suggest! Thanks.

Topic by jarris 6 years ago  |  last reply 6 years ago

Cheap phone cards with no expiration?

Whats the best (and by best I mean cheapest) calling card I can get that doesn't have an expiration. I only need 30 or so minutes. I want to be able to call international (middle east) from my cell phone (T-mobile prepaid) without being charged ridiculous amounts. I want something that i can leave in my wallet for a year and not have to worry about it being expired when I need it. The picture is totally unrelated, its a windmill

Topic by LinuxH4x0r 10 years ago  |  last reply 5 years ago

Modding a cheap MIG welder?

I recently bought a cheap mig gasless mig welder and I was doing some online reading about it. So I found out a mig welder should be DC, with gasless having the clamp at + and the torch at - . However when I looked at the schematic (in the images) and inside the welder to confirm it, and it was AC. So it turned out really cheap welders are ac. So my I want to try mod it to be DC. My question was, what diodes should I use? What Capacitors and capacitance do I need? And how do I design a Choke? I was looking at getting this diode:;=item25783015e5&_uhb=1  And then putting two of them together to make a full wave bridge. Would a Schotty diode Work? Or do I need a stud diode? And about what capacitance do I need? Would lots of 2200uF 50v capacitors in parallel work? Could I put in a variable ballast? and where would it go, on the 240v side or the output? Lastly, could I also add a modded microwave oven transformer for low voltage high current in parallel to boost the power? I guess I would have to wind it to have a similar voltage. Thanks

Question by makincoolstuff 5 years ago  |  last reply 5 years ago

Cheap and Easy Futon Frame

Hi all! I have been scouring the web for easy, simple futon frame building instructions and plans and I have not come up with anything!  If any of you would feel so inclined to try something simple that's made out of  say plywood, not slats and can be made by an amatuer woodcraftsmen, PLEASE SHARE YOUR KNOWLEDGE:)  I'm up for anything, it doesn't have to look traditional or anything, just as long as it can fold into a bed.  We need to build it for our boys to sleep on, but be able to put it up during the day. Thanks in advance!

Topic by jblhopper 8 years ago  |  last reply 8 years ago

Cheap DIY space savers.

So I'm in the middle of converting part of our basement into a new room to serve as my room.I'm looking for a way to make the most out of my space. My first ideas were utilizing a drawbridge style system to make a foldout table or something like that. the ceiling is entirely exposed.There are cords and beams and pipes everywhere up there.I thought perhaps some sort of drop down storage could be made. This is all I have come up with so far.I'm not too keen with drawbridges,so any help and ideas would be appreciated. the picture is me at age 15 .it shows part of the basement.Not much help. The furnace is behind the door.The door that we have sitting here for no apparent reason. Note: there is large closet already built in against the wall.That should store all the clothes I'll ever need.I'm thinking of purchasing a cheap futon for a bed,as the mattress I currently use is far too big.Does anyone know where I can find some blueprints for simple foldout tables.

Topic by Bando_Red 10 years ago  |  last reply 10 years ago

Cheap 3D printing company?

Hi, I would like to get a 3D print of a model I made. I've heard a lot of good things about Ponoko. I exported my file from SketchUp to a Collada file(*.dae), and then uploaded it to I selected the material, and this is what I found out: It would cost me $200 for a 3-inch cube, with the cheapest material(durable plastic)!!! Does anyone else know of somewhere where I can buy reasonably-priced 3D objects that I design(<$70 USD)? I'm not worried about shipping time, as long as i get it within a month.

Topic by metrogdor22 8 years ago  |  last reply 5 years ago

Cheap Arduino Drone Project

Hi there  :)  , Right now, I am busy on a project, called "The HoboDrone" to make a cheap ass drone. It is my intention to make a DIY guide for everyone. The next problem that need to be solved right now in my project, is to process all information that comes and goes through this drone, through the Arduino. My question is if it's possible that an Arduino handles next tasks/can deliver enough CPU-power for: - Reading the sensors - Run the code to stabilize the drone - Control the electromotors (output from stabilizing code) - Get input through RC-signals and control the electomotors I did not start writing the code for stabilizing the drone, but there are plenty of examples out there, like the bluecopter: (This code doesn't deal with RC-input from a controller on the ground) I have read a similar DIY project which used a Raspberry Pi, which took care of a part of the code. ( Is it possible to only use an Arduino in a Drone, or should I work in the direction of a coöperation between an Arduino and Raspberry Pi ? Thanks in advance!

Topic by Prestigious_Hobo 2 years ago  |  last reply 2 years ago