Hello,I'm Marcin from Greece. I saw yesterday a video about a interactive speaker cloud,but is too expensive for me.I started search about how to build one and I saw Arduino think. (I don't have any experience about it but with instructions I believe I can make it for my nephews) That is my project: I think to use led lights and speakers 2.1. I want to sync the woofer with a specific led strips that gonna make a bright white/light blue light when a loud lighting strike hits and then the following sounds that happens at lower volume to light up the others leds,and some times some random lightening lights. All of those thinks to sync with a sound effect of raining and storm that I will download from YouTube and can play for 1 hour and more. Maybe inwill use ceiling power supply so please someone tell me if that is possible to me to make it and how much gonna cost and if anyone can guide me about what I will need and the commands.Please if anyone can,really I want to make it for the kids because they love it when is raining and hear strikes.Love from Greece.SORRY FOR MY ENGLISH.

Question by marcin93 

help me ?

Why can not publish my statement

Question by rint   |  last reply

Scooter Help

I want to Build a Electric scooter trike. I need ideas for motors and batteries to run the scooter/trike. any suggestions are greatly appreciated.  I also wanted to know if I have two wheels in the rear and on in front and attach the drive mechanism to the back right wheel will I go straight or in circles? Thanks, Pfarmkid P.s. I will give credit to the person who gives the best suggestion if I make an instructables about it

Topic by Pfarmkid   |  last reply

Soldering Help? Answered

So i recently got a 40 watt weller soldering iron. This is my first soldering iron ever, and i have watched many instructional videos and tips on how to use it. I had a bit of trouble tinning the tip but i got the hang of it. I am using Rosin Core Solder btw. Today i went to go practice my soldering a bit, so i plugged in my soldering iron and waited for it to heat up. Once i heated it up i got a damp sponge and i wiped off the old solder. IIRC i wiped it off and then tryed to tin the tip again, but i saw my tip has turned black. I tried to tin it, but the solder just turned into a ball and rolled off the tip, as if the tip was oil and the solder was water. I tried taking off what i presumed was oxidation by cleaning it with the sponge, mr. cleans magic eraser, and my last resort was a nail filer. MR cleans magic eraser turned the oxidation a grayish blue, but the nail filer was the only thing that took off all the oxidation. (i know that any sort of abrasive thing shouldn't be used, but i was angry and confused). I felt pretty happy, but as soon as i put solder on the tip, the tip immediately turned black and the solder rolled off again, making tinning impossible. I tried re tinning my spare chisel tip too and it wasnt so bad, but the solder just rolled off too. Now all i have left is a tinned "mini chisel" tip that im scared to use because i dont want to mess up what i have left. Is there something im doing wrong? I could really use some help.

Question by jaguilar16   |  last reply

Help with invention

I have a prototype .of an Ivention i been working on. i need help getting it to market

Question by Israelrentas   |  last reply

katana help?

How to make a large stick into a derable katana ps the pic is just some cool swords

Question by dude787 

Rocket help? Answered

How can I build a high powered rocket? It needs to be cheap and i also need help on california san jose high powered rocket laws.

Question by lockpick   |  last reply

Help with Render

Hi, I am making a render but for some reason one of my cubes keeps showing up with jagged edges. All the blue blocks have the same shader. I post all the settings I have. If anyone can help me out it is greatly appreciated. Muster

Topic by MusterM 

Please help!!!!

I am new to the site. First of all I would like to say that this site is great and it has a ton of helpfull information. My question is that on the tail lights of my car I have led lights. It already has the circuitry for to do its job of getting brighter when you hit the brake and it comes back to less bright when you have your parking lights on. The tail light has 2 sections 1) the park/brake light and 2) the turn signal. I would like to make my turn signal section to light up some what dim when I turn on my parking lights and then when I activate my turn signal to flash brighter. Is there anyone who can help me with this? I tried connecting to my parking light wire to see if it would work with a resistor but it did not. HELP!!!!

Topic by Domnican21   |  last reply

woodworking help?

In woodworks class we are turning pens and pencils. We are also making boxes to hold them in but I am trying to find an alternate to the style of box the rest of the class is making. I have found another style I like but I am not sure how I would make it. Our shop has a lot of tools so I don't think  finding the right tool should be a problem. Below I have attached pictures of the style I have chosen. Any help would be greatly appreciated and thanks in advance!

Question by ginger snaps   |  last reply

Please help me help them...

I am in serious NEED of information on HOW TO TURN PLASTIC WATER BOTTLES INTO SMALL BRICKS, BLOCKS, TUBES. I am moving to a very poor island where I need to bring this process to the islanders. The horrible poverty is now compounded even worse by all the plastic on the island that that has NO WHERE to go (the government does nothing). If I can find a way to do the above, in a very small, rough manner (IE: men using machetes' to chop up bottles) it will IMPROVE THE LIVES OF THOUSANDS OF HURTING PEOPLE. Thank you in advance for helping me to help them....I will take ALL I CAN GET. Selling my lake home in Wisconsin this summer and will be gone for good by Fall 2009. Give me something to take with me by then....OK? Ma Barley

Topic by scubagal   |  last reply

Dune Buggy help

Hey guys I got a Kinroad dunebuggy and it shut off, when I turned it on the engine revs when I presses the gas but will not move or engage Any help will be greatly appreciated 

Topic by whelton1 

Hood Ornament Help? Answered

I am starting to collect things that have to do with cars, like hood ornaments, and I came across this. I tried looking it up, but I found no help...anyone know? I swear I have seen it before, but maybe not.

Question by Hackrtanman   |  last reply

auto paint help

I am not in to paint jobs but really love to do good work and i know if some one gide me good i do very good job from my heart. need little info i want to paint my car rear quarter pannel there is little rust which need to be fix.and i have sanded the quarter pannel the silver body is show now i like to know after fixing the rust what step do i need to take?put filler or first spray with the epoxy primer to wont get rust then filler?and after spraying final paint do i need to sand the paint before clear coate or after final paint do i spray the clear coate straight away?

Topic by acura2.2cl   |  last reply

68 Camaro Help

So my Dad's Birthday is coming up and I want to get him his high school 68 Camaro Z-28. He was selling it (or so he thought) to a Mark T Reese, wife Janet living in Mobile, Alabama. My dad lived in California. Mark said he didn't want to buy it. He offered to sell it for my dad and since he already bought plane tickets, rented a trailer for the Camaro and was in Arizona on his way, so he accepted. So he went and dropped it off and came back to California and never heard from him again. I asked my dad the VIN but because it was a race car so it didn't need to be street legal so carfax is useless. He bought it in 1979. If anyone happens to know how to find it please let me know. Thanks.

Topic by alecgates15   |  last reply

Wood working help?

To make this question as short as possible, I'll get straight to the point. I am making a replica of a weapon from a game from wood, however the blade is quite large. Its a kind of battleaxe (see picture below) however I'm having a hard time finding a way to get quite a big piece of wood to slope to a point like a blade would. So basically I want to make a large piece of wood into a long wedge shape but I cant figure out how to do it. As you can see in the picture, using the hand on the handle for size reference, it is quite a large blade. The tools I have in my workshop are: A table saw, a band saw, a scroll saw, mitre saw, drills, handsaws, and chisels. (these are the only tools I think would come in handy, I do not have any tools such as a belt sander, though I do have an orbital sander if that helps) Any help it appreciated! Thanks.

Question by Hiyadudez   |  last reply

help killer homework

Help you have 3 hours to find the life cycle of a hermit crab for me i need a diagram and if possible adaptation though im ok on it. help help help help help

Topic by DELETED_Gavabc123   |  last reply

Help for Replacement capacitor ? Answered

250v185j cl21 capacitor  burned from  old portable rechargeable fan what can i do.. pls help me for  replacement capacitor in india

Question by RaviT120   |  last reply

Frequency help needed.

Does anyone know what frequencies of laser light can effectively and efficiently ionize normal air into conductive plasma?

Topic by Masterdude   |  last reply

Project needs help

Ok. So I am printing a 3d model of the ghost from destiny... and it has a small LED light that activates when I twist the body. I'd like to make a hologram that spells the words "Hello Titan". I have seen some people use simple Holographic paper pyramid but how could I do this? After this is done I want to put a speaker with a pre recorded voice that says the same thing everytime the light activates? (Help would really be appreciated :)

Topic by Mrhorrible4 

Help identifying this tool? Answered

I have no idea what this tool is. I found it in my fathers shed. It's about 11 inch long and the smaller piece moves up and down the main shaft of the tool No one seems to know what it is.

Question by geoffers1   |  last reply

Blasting Cap help

I was wondering what others use for their cap bodies, i have been told to use spent brass to hold the HMTD. any better suggestions?? ANFO doesnt like brass so i was wondering if AL casing or heavy paper casing would work better? Thanks.

Topic by joeskater26   |  last reply

Mk7 extruder help

Instead of buying the extruder I plan on making it instead using various parts I have already however I do not have the thermal core. I am capable of milling and if not I know someone with a CNC what I don't have that I need are the "EXACT" dimensions of the thermal core can anyone give them to me?

Topic by pattyshaw   |  last reply

Dead Dremel help

I have a Dremel tool that is a few years old.  the other day it quit working, I was using it heavily.  I checked the brushes they looked fine.  I opened it up and everything looks OK the motor/ shaft are connected and spin. The  only thing I noticed was what looked like a thing strand of solider on the one side near the brush.  Any ideas?

Question by denkeeper   |  last reply

Induction Motor Help?

Hi guys i have come across an induction motor out of a treadmill. it states on the lable that its single phase induction, 240 volt, 4 poles 3/4 hp. 1.7 amp 1420 rpm. question 1- is there any safe way to see if it works question 2 - can it be used for a small wind generator to charge 12volt batteries to light a shed question 3 - is best put in the trash where it came from any assistance advice would be appreciated

Question by sam301   |  last reply

3D Printer Help

I am considering buying a 3d Printer, but I need something cheap and easy. I found a model that a like, it's the FDM 3D printer. The problem is, science I'm new to 3d printing, I have no idea what to look for. This particular printer has a low cost with a decent print size.                     Link to Website  ~~~~~>;=1425238313&sr;=8-15&keywords;=3d+printer

Topic by MASH567   |  last reply

Help: Mechanical Odometer

I have a bicycle trailer that I use for groceries and such, and hope to use for extended bicycle trips. I would like to get or construct an odometer for the back of the trailer, to advertise how far I've traveled. I've looked around a lot, but have had difficulty finding an non-electric or large-display DIY odometers (ideally, I would like the numbers to be 2 to 3 inches tall, and would like to keep it below ten pounds). I would prefer it to be mechanical only, requiring no batteries or electrical power, but am willing to give on that point for the sake of simplicity of design, weight and cost. If you have any advice where I could find advice or instructions on how I might set something up, I'd greatly appreciate it.

Topic by dreamclassier   |  last reply

transformer help needed

Hi guys, i'm a newbie on here so i would like to take this opportunity to say hello :) i have a salvaged transformer that i'm working on at the mo. It is the primary that is blown, but the secondary is fine. I am in the uk, so it is designed to run on 240. Because i am looking to produce high amps, one solution would be to use the secondary as a primary, otherwise i am looking at doing a full rewind. i'm kinda new to transformers, but have enough knowledge for the job in hand. my question is how many turns does the primary need to have? i know that you cant give me an exact figure without the dimensions of the transformer in question (700w microwave transformer if that helps) but i seem to remember from school physics that there is an equation to work out the number of turns a primary must have at a given voltage, i have googled for days to no avail, i'm guessing it is out there somewhere, but i cant find it :( and the last question is that if the transformer was to have too few turns on the primary, what would happen when it was plugged in? my guess would be that it would short out the mains and the coil would rupture, possibly tripping the circuit breaker? many thanks to anyone who replies :) and merry xmas to all :) 

Topic by jbaz73   |  last reply

Need Help With AirGun?

Okay, I've made air rifles before but this is a little more complicated... This one is a replica of a M14 (kinda). It's going to be powered on C02 cartridges and all the insides are going to be hid. So how it's going to work, you insert a C02 cartridge and pull a lever and that will push the C02 into a pipe that has an airtight seal and will pop the foil on the cartridge. From there the air will flow to a "holding" chamber, on the end of the "holding" chamber there will be a button valve (, from the button valve the air will flow to a second "holding" chamber were there will be a home made piston type valve ( Then you cock the bolt and a magazine or a single chamber (haven't decided yet) and a bullet type ammunition will be loaded in. The ammo has two parts (like a real one) the actual projectile and the casing, in the back of the casing there will be an air tight seal. A "tube" will be inserted when the bolt is pushed forward, and the seal will be made. So when you pull the trigger is pulled the piston will release the air from the second chamber and shoot the bullet out the barrel. So the shooting proses would cock the bolt, insert the bullet, close the bolt, press the button valve to release the "airlock" type chamber, and the pull the chamber. So what I need to know is how big do the two chambers have to be, what kind of velocity would I be able to achieve, and is this a good idea? Thanks for the help, Nick

Question by xZCodmaNZx 

Forge Ventilation help?

Hi all, Due to location & noise, in order to continue using my coke forge and anvil I must move indoors, into the shed to be precise. I know it sounds a bit crazy attempting to run a coke forge in quite a confined (10-14 m3), fairly air tight space, but I have researched thoroughly the dangers and safe working levels etc and have the use of a fully calibrated gas analyser designed to measure CO in real time, so safe operation will be measured to the nearest ppm :)  The fans gumf claims 1060 m3/hr which I guess is best case, flat out @ 50hz and obviously does not allow for any other mechanical losses, but even a conservative estimate must give around 45 air changes an hour, which to me sounds like more than adequate clean air coming in to displace combustion gasses. But I guess the first question is will the chimney work as a passive exhaust,  to maintain positive pressure behind the chimney (which will be 12") I will have only a forced air inlet and no other vents other than the chimney itself, trouble is I can see it both working and not working: 1. Inside air will be forced up the chimney as that is the only way out = more ventilation 2.Inside air will cool the air in the chimney reducing the natural draw =  less ventilation And even if the CO issue is overcome will heat just ruin my plans anyway?

Question by Squibo   |  last reply

Help with Dynamo types

I have a question for everybody out there. It has been a very long time since I did this type of electrical design work, and for the life of me I can’t remember the principals. I know there are many different ways to generate electricity by using mechanical motion, and converting a motor into a dynamo is very easy. What I am trying to do is to make a brushless dynamo. I have taken my inspiration from a cheap hand cranked torch, and intend to improve on it a lot. In this torch it has a coil which has a flat disk magnet sitting above it. The magnet is spun creating the charge in the coil and is used by the LED's in the torch. What I want to know is how specifically the voltage (potential difference) is created in the coil. My experience of stationary coils is where the magnet is rotated inside the coil. Could someone please explain it to me? Many thanks.

Topic by Batdragon   |  last reply

help wanted designing an aircraft

I'm planning to build a one man electric aircraft without the use of batteries. But to make it the best i can i want it to be designed very well. And since i don't have enough experience with designing i really need some help on that part. The electrical part i can do myself just like building the aircraft. If there is anyone who can and want to help me i'd really appreciate it. For more details on the project please contact me.

Topic by johnny13   |  last reply

Need help with engine trouble.

Ok, i thought about buying this car, but want an idea on whats wrong with it, they sent me an email saying they checked the catalytic converter when i asked, its a rotary engine but on the post it said "Runs but slowly gets up to speed" and want an idea on that.

Topic by Yerboogieman   |  last reply

Help, I need a project

So after many hours of looking through page after page few things perk my intrest on what I would like to make as a project. I would like to make something electrical and science related like some kind of apparatus of sorts. Link me the instructables or give me an idea. Thanks! (Perferablly able to be under a 100 or a couple)

Topic by Ironman13405   |  last reply

A/C Compressor Lubrication Help? Answered

I am almost completed an A/C compressor compressor.  I wanted an air compressor, and I decided to build one from an A/C compressor.  Before I finish it up, do I need to have some oil being fed through the system and separated before the tank, or can I run it straight with just air coming in and no oil? Thanks

Question by Electric Spectre1   |  last reply

Circuitry (Electronics) Help/Books

I am looking to expand my electronics knowledge. I already know the basics (and a bit more), so please no suggestions for the basics. I know enough to build my own basic custom circuits. I am very knowledgeable about the Arduino (I use it practically every-day). I know how to use resistors, capacitors, transistors, most diodes (LED, Photo-resistor, current-blocking, one way, zener, etc.), and much more. I am self-taught, but want to further my education. I am VERY interested in robotics (I plan to work in aerospace engineering when I'm older), if that helps any. I am in need of good books to read on. I've gone through most of the projects in Forrest M Mim's books that I got in a kit from radioshack. I really would prefer some eBooks, though. Free is good, but I'll pay if it is necessary. Thanks! (:

Topic by freethetech   |  last reply

Electric bike motor help!

Helli guys.. after a long time racing motocross, I would like to experiment into doing an electric dirt bike for myself.. My plan is to find an 85 or 125cc frame with no engine, and build from that.. the biggest question is, what motor could I use that is no less than 15kw, and on the affordable side? I was looking at the Turnigy Rotomax 150cc eqiv. And it has a max power output at 9000 something watts, would that be any good for a motocross bike? Would it burn out quickly since its pretty small? Notes: i am strictly looking for powerful bikes, a 2kw bike is not for me since I am used to overpowered 250cc two stroke hell-born suicide machines, thanks..

Topic by dsirotic   |  last reply

Looking for help with making a coils

I am wanting to make a rodin coil, like the second picture I included, except I don't have a 3D printer and I don't necessarily feel like dropping $200 on buying one and learning how to use it just to make a coil. So I'm asking if anybody would want to 3D print, ABS is fine, a Rodin coil for me? I have a PayPal account so we could work out a mutually agreed-upon price and I'll pay for shipping. I will also cover the the shipping cost. 76five, for6O, fourOsix9 shoot me a text ( that's my Google Voice number obviously I wouldn't give out my real cell phone number LOL)

Topic by DonS165   |  last reply

Need help identifying a tool!

We're cleaning out my late grandfather's house in Caseville, MI. We found what we think is a garden tool but none of us could identify it. I need help identifying what it is and what it is used for. 

Question by HollyHinchman   |  last reply

please help me out...................

.hiiii,....... hope u r f9. we are planning to build a 4 wheeler battery car. but we need a help for making the chasis. and wch motor vl b helpfull for us, if it work for 10 min also dn it is also more dn enough for us so kindly help us out of dis. we r vry new fr al ds. v r gtng ac motor bt battery is dc wch is used in trucks. v dnt want 2 use invertor in dt so kindly can u suggest any dc motor n can u help us fr gear system please............... v vl b vry thankfull 2 u if u vl help us out of dat plsssss v r hoping alot frm u sir.

Question by mechx   |  last reply

HELP. laser tvB gone.

Got an idea after  som beers.. how  bout puting a laser on a universal remote , or a tv B gone. and  a  sniper scope.. Is there a posibility? The  amount of  fun that  could give is insane. ... jupp i am evil..  Need som help from you beutyful geniuseses.. um  seses ok ? 

Topic by bergen bang   |  last reply

electric scooter please help

Ok i just got a junk scooter and i have it running on a pair of car batteries and i wanna know how i can completely pimp it out and make it go at least 30-40 m/h (48-64 k/h) ya so if you can help me plz do so

Topic by darth acexxacer   |  last reply

Need Help on Orrery gears

Hi, I'm planning on building an orrery and I need some help. I've been doing some research on instructions on how to build one. The main thing that I'm not completely understood with is the gears and how they actually work. I know a bit about some basic principles of gear ratios and stuff but not like the actual mechanism (ps i like to look at diagrams). I'm also planning on making 9 planets (i mean 8 + pluto and the moon and the sun). Any help would be appreciated, thanks!

Topic by xelasetahevets   |  last reply

lawn mower uses. Help

How can I make a lawnmower engine power something like a go-kart for under $20? I don't have a welder but I'm good with tools.

Question by jimmerforpoy   |  last reply

help with installing a doorbell transformer?

I just bought a doorbell transformer and i know how to do everything but install the transformer.. i know it could be hooked up to a junction box i just dont know how. it has three wires on the back, and a junction box i looked at had four different colors of wires in it. i do not know how to install it. please help me.. thanks

Question by 87bhoward   |  last reply

Help on how to build an emp

Hello I am an Italian boy, and found this site because I was looking for a way to build a emp. or I tried to build it with the disposable cameras but with poor results, I would know to pass through a scheme to build a

Topic by gemz-ita   |  last reply

Help to find a CNC project! Answered

Some time ago I saw a project in which do something like this, but now I can not find it. Does anyone know which is the project of which I speak? Or someone can tell me how to call these "gates"? Thank You

Question by facine   |  last reply


The machine should be able to wind a filament or wire around a beam structure that could measure 40 feet long by a diameter from 5 to 40 inches. A mechanical tensioning system portable and compact for supporting and dispensing fiber filament or wire, to the filament winder with a standard tension range from 1 lbf to 10 lbf. The winding around the beam such be done silmultaniosly in a criss cross pattern to a 45 angle degree. If interested in helping me with the design, my options are open to discuss terms. Please contact me if more information is needed. thank you, munsangv

Topic by munsangv   |  last reply

need help selecting a controller

I have 3 nema 23 stepper motors. unfortunately I cant find instructions in English for the controller. and the controller is incomplete when shipped. the controller that came with it is a tb6560-t3-v5. never used, but cant find instructions nor anyone who can explain it to me. I need a new controller with good instructions for 23hs22-2804s. any suggestions or anyone who can explain that?

Topic by wolfbain5   |  last reply

Mousetrap car Pulley help.

Hi! ive been working on a mousetrap car for my physics class and i was looking into the idea of pulleys to get more power to pull on the axle to rotate it. Ive noticed that alot of the Pulleys I see all rotate on an axle which I can not acheive due to the small space on the car. So my thought would be to anchor these small wooden pucks (small like 1 cm diameter) and have notches in them so that the fishing line wouldnt slip. (picture) Can I get some help on wether or not this would work? If it works can I get some input on how i could make it better? ex. different pulley designs that dont require moving parts. Thanks in advance!

Topic by noobiefied   |  last reply