Cheap smartphone

Hi , i found a really cheap android smartphone here ... but im not sure is scam or not. Anybody here know about this brand or this phone?

Topic by docrivers   |  last reply

cheap mythbusters

Does anyone know where to get all of the mythbusters episodes at a resonable price like: Season 1 part 1 Season 1 part 2 (is there a second season!?!) season 3 season 4 to buy all of them off of discovery it's 200 bucks!

Topic by guyfrom7up   |  last reply

Cheap equpiment?

Are there any decent, really inexpensive equipment of: metal/cnc lathes cnc mills by cheap i mean under 300 dollars each, even cheaper is better! they don't have to be really expensive, actually for the mill, I'm only looking for something that can mill like 4"x4"x2" or something like that. And for the lathe I'm looking for something that can mill like 3 inches in diameter and a foot long. Thanks!

Topic by guyfrom7up   |  last reply

Cheap Pcb? Answered

Is it possible to create a pcb with cheap common household items and if true what can i use? I already have blank pcb but i was wonder can i substitute the etcher and acetone with other materials. 

Question by Kante Tech   |  last reply

Cheap accelerometer?

Hello all, I'm building a textile interface using LilyPad Arduino and accelerometers to catch the movement and acceleration of points on this interface. As I intend to use a relatively high number of accelerometers (5), I've been wandering if there is any DIY accelerometer, or any cheap solution to it (as I'm brazilian, lilypad's accelerometers have a pretty high cost) . Thanks,

Topic by lgguts   |  last reply

good cheap microcontroller?

Does anybody know a good cheap microcontroller that has at least 5 outputs, programmable via usb, and a fast clock (1000 ticks/ second)

Question by coleyy   |  last reply

Testing a Cheap Multimeter

It's been years since I had an expensive meter. These days, I have meters in the $5 to $20 range. Usually they're accurate enough for my purposes, but what if I want to be really certain? Is there a way without a pricey meter to test em?  Perhaps calibrate the meter by checking v  coming out of a v regultor. Would that be accurate? Perhaps the 7805 regulator which is supposed to output 5v.  y?n? M?

Topic by Toga_Dan   |  last reply

Cheap Compact tripod Answered

Ok, so I have asked a question like this before, but I never did get a compact tripod, and i am going on a trip in a few weeks and could really use the tripod. So I'm going to ask this again, but a little differently I need a tripod, preferably; Less then 16" when folded. I'd very much like 14" or even 12" if possible Extends to 50" minimum. Preferably >52" Costs less then $50, around $35 Weight is not really an issue, but lightness helps :) I am going to be sticking it in like the waterbottle holder on a bag- maybe a clip or something so i could hook it to the strap Stability is not a huge issue, as I am only putting an FZ100 on it (19.9 oz), so it doesnt need to support a DSLR, just a heavier P&S-; I do plan on some longer exposure shots however I think thats it... I do feel kind of sorry asking this question, but I really dont have the time or resources to find this completely on my own, and I am asking for a pretty strict set of rules. Thank you all so much in advance- Sincerely, A907

Question by astroboy907   |  last reply

cheap tracks for robaots

Does anybody know were to buy or how to make tracks for cheap

Topic by zach s 

Cheap digital DVR?

Can anyone tell me how to turn an old computer into a DVR?   I'd have to do it on the cheap.

Question by Hubiewan   |  last reply

Large cheap breadboards?

I need some large breadboards for free or very cheap. Is there a company that gives free samples, or someone here who has some they don't want? I also need a way to cut them.

Question by XOIIO   |  last reply

Cheap PIC microcontroller?

What is the cheapest PIC microcontroller with an analog input(a2d capability) and a few digital outputs?? and how much does it cost?? Thanks!

Question by Chris414   |  last reply

Cheap phono preamp? Answered

Hi, I have a record player which I would really like to play through my home entertainment system. So I need a phono preamp to run it through. Does anyone have instructions on how I could make one or where I can get one really cheap?

Question by David97   |  last reply

Underwater Photography on the cheap

I'm trying to 3D print reliable underwater camera enclosures. Here's where I'm documenting my progress: What do you guys think? (first post ever :D )

Topic by MoonLanding 

Cheap IR illuminator

I have been wanting to make night vision for a while and I get the question. How do I make an IR illuminator? Well I can buy 15 long range IR LEDS or I could buy a pre-built one for under $20. I have searched everywhere and still can't find what i'm looking for.

Topic by ry25920   |  last reply

Cheap GPS Unit

Where can I find an incredibly basic GPS? I am looking for bare minimum, something that just showed its location or that had an LED that got brighter as you got closer to an entered point. I am just trying to determine if simplistic GPS units are still available amidst the flurry of moving map, full-color, talking, computerized models with built-in A/C and a fridge. I would like to get into Geocaching, and just have a cheap GPS, but the cheapest ones I can find are still LCD screens with moving maps that cost $200. I'm hoping for well under $100, but I'm not holding out. I'm a geeky high schooler with no budget to speak of.

Topic by CameronSS   |  last reply

Cheap calculator hacking

I put together a Solarbiotics Magbot Pendulum and it has a period of one second. I measured this by using a stopwatch and counting the swings for five minutes. . What I would like to do is count the number of times it swings back and forth over an extended period of time, for example 24 hours.   I came across an article showing how to use a cheap calculator to count the number of turns a shaft makes. A cam attached to the shaft presses the "+" key each time the shaft turns one full turn. to use it, you clear the calculator and press the "1" button. Then every turn the cam presses the "+" button and 1 is added to the sum being displayed. Every cycle of the pendulum causes the LED to flash (pulse)  once. I'd like to use these pulses to do the electronic equivalent of pressing the "+" button.  It might be possible to count these pulses using electronic circuitry (decade counters) but electronic calculators only cost about a dollar of two and I'd like to give that a try. Any suggestions would be appreciated.

Topic by koyescha   |  last reply

Cheap calculator hack

I put together a Solarbiotics Magbot Pendulum and it has a period of one second. I measured this by using a stopwatch and counting the swings for five minutes. . What I would like to do is count the number of times it swings back and forth over an extended period of time, for example 24 hours.   I came across an article showing how to use a cheap calculator to count the number of turns a shaft makes. A cam attached to the shaft presses the "+" key each time the shaft turns one full turn. to use it, you clear the calculator and press the "1" button. Then every turn the cam presses the "+" button and 1 is added to the sum being displayed. Every cycle of the pendulum causes the LED to flash (pulse)  once. I'd like to use these pulses to do the electronic equivalent of pressing the "+" button.  It might be possible to count these pulses using electronic circuitry (decade counters) but electronic calculators only cost about a dollar of two and I'd like to give that a try. Any suggestions would be appreciated.

Topic by dickb24   |  last reply

Needle valve on the cheap?

I need a needle valve or similar to adjust some pressure with more or less precision. Problems I am facing with commercial solutions at the moment: Needs to withstand about 300psi max pressure, must survive contionous exposure to concentrated ammonia vapour. I already wasted too much money on stainless steel valves claiming to be chemical proof and capable of 6000psi only to find out they use seals that turn to goo in the ammonia vapour and fail. And since the stuff is not really healthy, not easy to get, I would prefer something safer. Real problem is also that the thing should be able to allow for good flow rates when opened fully. Modes of operation: During the active cycle ammonia vapour needs to pass through an opening as big as possible while after that the flow must be shut off. The reverse cycle needs to be adjustable from closed to fully open with great detail to control the flow rate. Current ways to compensate: With a ball valves and extra piping I could seperate the two cycles so I won't have to bother with tiny openings but I would prefer to use only a single connection. With a bypass around the needle valve this could be accomplished better but still looks ugly. Materials out of the question: Copper, brass, normal seals based on rubber, nitrile or similar. Questions: I know fully sealed in.line valves exist for LPG system and similar. Are any of these magnetic valves available for the use with ammonia? And if so: Can they be operated with a neodymium magnet instead of the coil? Even stainless steel valves rated for chemical use and high pressure fail quickly on the seals. Is there anything available that does not use soft seals but for example aluminium instead? Thinking spray pump here... One way ball valve systems like used in simple spray pumps are a great thing. With some aluminium tubing I was able to make a simple valve that with some more attention to detail might even work. But of course there no other way of moving the ball then to use a magnet and with sufficient back pressure even neodymium ones fail to get the ball in the open position and keep it there. Now getting this combine with a needle... If, instead of the ball, a magnet in a teflon shell is used on a spindle I could spin a magnet around the outside to turn the valve with great precision. Has anyone already designed such a thing or would I have to start from scratch here?

Question by Downunder35m   |  last reply

Easy/Cheap Heating Element?

Is there any way I could make a DIY heating element? Or, if not, is there anywhere I get get one on the cheap?

Question by LiquidLightning   |  last reply

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   |  last reply

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   |  last reply

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   |  last reply

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   |  last reply

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   |  last reply

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   |  last reply

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 

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   |  last reply

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   |  last reply

(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!   |  last reply

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   |  last reply

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   |  last reply

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   |  last reply

Simple/ and or cheap variable thermostat?

Well I have a friend who is looking into the purchase of a snake, and meanwhile picking out the snake and the heating element isn't the hard part for him (he's looking at a 23 watt 120vac heating pad for it). He was also looking at a thermostat designed for snake tanks, however they want close to $150 for it, and it doesn't even have many features, it's basically a black box with an 3 digit lcd and a programable timer. I know it wouldn't be hard to put something similar together from a pic and a few different parts, however it's been a long few years since I've designed a full schematic of something, let alone look at one. So I was wondering if someone so kind might aid me in making of a schematic so my friend can go order the parts he needs and I can build it for him (don't have a problem assembying circuits from raw schematics, I find it fun). However, there is a couple things he wants out of it. Number one most importantly, he wants it to be able to adjust the output voltage so he doesn't fry his snake (most simple thermostats simply turn on until temperature is reached, then off), no he wants something more dynamic than that. Second, he needs to have an external temperature probe so that he can keep the thermostat outside of the tank whilst keeping a handy eye on the temp and also obviously so that the thermostat knows when to come on (is there a limit to the length of wire you can put on a thermocouple?). Third and last, we need a simple timer circuit that keeps track of the time (what's that involve? a 13mhz crystal and a few other parts?) so that at night the thermostat can change it's "heating schedual", I assume so that it tries to maintain a temperature say 3-4C above the programmed temp. (night mode anyone?) However the thermostat he was looking at buying wanted you to buy a second cord, which connected to an external appliance timer (yes you heard me, a $9 wall timer) so that it knows what time it was. My friend really needs this as he's looking into getting this snake within the month. I appreciate anything anyone has to offer. Thanks guys! -Punkguyta

Topic by Punkguyta   |  last reply

Maybe Found Cheap EL Wire?

Hey,  I was doing a quick search on ebay and found this. Its cheap el wire. The best part is its orange,(Clemson Stuff). Its about 10 bucks including shipping.;=110416611409&Category;=71537&_trkparms=algo%3DLVI%26its%3DI%26otn%3D1 Is there any problem with this stuff. 

Topic by imthatguy1125   |  last reply

Cheap Easy CNC: To post or not to post?

That is the question. It will look something like the one pictured, and will be a combination of this, this, this, this, and many months of research. It will be cheap, under $300 easily. I want to know if I should do an 'Ible before I make it so I can take pictures. What do you think?

Topic by snowpenguin   |  last reply

I'm looking for cheap audiophile headphones? Answered

I want some cheap audiophile headphones to listen to music from my laptop.  I'm unwilling to spend more than $100 on them but that doesn't mean I want to spend $99 on them if I can avoid it.  I just want the best sounding over the head, earcup, noise cancelling headphones i can get for the cheapest price.  Do you know of any?  I already tried cnet and it was sorta helpful but you're probably more helpful.  Thanks!

Question by cdubnbird   |  last reply

Looking for a cheap and easy project for a beginner

Hi :) Next year, I'm planning on starting a Mechanical Engineering degree. I want to get some hands on experience with making stuff just as preparation, but I've never done anything like this. What's a good place to start? And something that won't cost a lot as I don't have much money? Any help is appreciated :D thanks

Topic by mheywood   |  last reply

change a cheap laser pointer color? Answered

I got a cheap laser from the shop. here is it : It is red. Is there a way i can make it green, blue, purple, yellow ,etc. ? and another one: How can I focus a led on a single spot to be like a laser?

Question by netbus   |  last reply

Cheap External Mix Snow Machine

*EDIT* IT WORKS!!! Hi everyone, this is a simple DIY snow machine. It utilizes external mixing which not only increases the production but also eliminates the risk of water backing down the air line and vise versa. I will not be making an instructable but possibly a video displaying its qualities. It only needs an air compressor with the standard quick connect end and a regular garden hose. It works and I may be selling a few on ebay for ~$75 each and will include a professional looking instruction manual. This produces a very large mist and i have yet to measure its snow making capabilities. I expect it to make about 2" per hour over a 200 square foot area. Please comment and rate!!

Topic by Electroinnovation   |  last reply


Can anyone give advice on how to make a cheap art projector - to enlarge small images/drawings/photos onto large canvases or walls? Using cheap but effective lighting would be best.  thanx to all

Question by 52ace   |  last reply

suggestion for a cheap ip web camera?

I've searched a lot in google for a cheap camera that transmits through wifi ( ip web camera ) i need it for my project, so any suggestions i'll be thankful :) kind regards

Question by rawand   |  last reply

cheap pc racing wheel problem

Hi, i have recently buy a cheap pc racing wheel  i have a problem the wheel have a deadzone of 20° IN each direction so it annoying when playing game so, there is any fix to remove this deadzone? thanks, 

Topic by lamineovich   |  last reply

How to build a cheap magnetic stirrer?

I want to build a cheap magnetic stirrer. I would like it if I could get all the parts at radioshack. Not essensial though. I would also prefer using a 9 or 10 volt motor. Someone Please tell me how!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Question by sci4me   |  last reply

Is there a cheap way to make a digital compass?

Trying to make a weather vane and needs to be hooked up to an arduino board. I have a rotary encoder which is just a potentiometer that can rotate forever. I need something to help determine direction, and for cheap. I've seen the compass modules , and they are just too expensive. >$40...Any ideas?

Question by arduinow   |  last reply

Where to buy large capacitors for cheap? Answered

Building various things, like tesla coils, railguns, and wire exploding devices, reguires very large capacitors. I need to know where to buy some with high voltage and capacitance rating around 450v and 10000uF.

Question by macgyver603   |  last reply

Cheap, simple, Project - Any ideas?

Hi all, I  am looking for some simple projects that I could do. First of all, it needs to be cheap. I am 14, and get hardly any money (14$ a month in allowance) so, I need it to go as far as possible. The simple part is optional - Just needs to be something I can do - Even if it takes lots of time. I guess Im not being very clear but I am looking for project ideas that are first of all - cheap. I already have soldering equipment, and resistors and capacitors  scavenged from trash (Stuff that can be created free of cost is best). Thanks!

Topic by schumi23   |  last reply

How to make a Cheap transformer for a project? Answered

I need to make a cheap step downtransformer for making a small arc furnace....i saw the project on youtube and the link is given below used carbon rods from AA 1.5V cells and i need a transformer that can be made from home available items like wires from dc motors and tube light chokers ...please give me details about materials required and the method of constructing

Question by ShwetangP   |  last reply

Cheap Lithium ion batteries - help?

I picked up 4 Canon NB-4L batteries for 50p each, thinking that for the price they might be worth having. However, I don't have a charger - any help with this? I've got power and electronics and stuff. 3.7V 760mAh (Li-ion)

Topic by lemonie 

Cheap Power Conditioning Unit (PCU)

In the video released by the windbelt creator, he mentions that his PCU only costs about a quarter. I dont know if that is his mass produced price, or his off the shelf price, but does anyone have any ideas about how to make a PCU for say, under a buck?

Topic by fafnir665   |  last reply