Not a question but? Answered

Today 2/11/11 is A. Edison's 164 th birthday.

Question by Re-design   |  last reply


A Question

Hi there, I have developed a new instructable and i placed it in photography category. I wonder why its not listed under the recent instructables there? Thanks in advance. The instructable address: https://www.instructables.com/id/Introduction-5/

Topic by bo3bo3   |  last reply


The perfect question? Answered

I came across this today - It seemed to illustrate the perfect question.

Question by rickharris   |  last reply


A couple questions

Hey guys, I want to bug you's again. Instead of trying to ask about different things in one of my other topics, I wanted to start a new one. I went to the local dump today, and one of the first things I spotted was Three, not just one, booster packs. You know, the ones you can charge up and boost a car with, and some of them have inverters built into them so you can run small appliances. Well I snapped all three of them up, thinking that at the very least, the lead acid batteries inside them would be OODLES of help towards making a full scale wind generator (I plan to build one or two full size wind generators with car alternators, whenever the good weather comes and I can work outside). Well, I got them home and cracked them all open. Turns out that only one battery is good to me (pictures below). The two identical units have 350 watt inverters built into them (I've removed one so far), but the batteries were bulging and the sides were split open, although not leaking, which was good, less mess to clean up. The third booster pack I opened appeared to have been already attempted at being opened. 4 of the 6 screws had been drilled out (which is beyond me as far as why they would do it? They were only phillips screws), but maybe they weren't successful? It had a couple wounds of electrical tape around it to hold it together. Needless to say, whatever cutting tool they used, cut into the battery itself (they cut too far in, dumbasses...), and so my main question here is, is the battery safe to charge, and use? I took some macro's of the damage and some of the cut marks seemed to have gone far enough in to cut into what appears to be a white plastic lining inside, as the white crud on the sides of the battery feels more like burnt on plastic from a cutting disc than it does acid that oozed out and dried up, so the damage doesn't appear to be that bad. What's the worst that could happen anyways? Also, the battery has about almost 8v left in it, and another question is, is that too low for a 12v battery? Like has it been discharged too far? Also, aside from the battery. I found this plate with a transformer, giant capacitor, and a pcb that looks like it was some kind of voltage converter board (I would take a picture but I've since cut a few things off of it and I won't even bother now) The transformer puts out 25v and you can see in the pictures what the capacitor is rated for (I would like to know what I can use this capacitor for, or if I should save it and wait till I can make a bank of capacitors for a tesla coil project or something) What I can't figure out, is what is this square device I found that was plugged into one of the output leads of the transformer? It only had two leads coming off of it, one is marked + and one -, the other two terminals don't have marking on it. No model numbers or anything. Does anyone know what this is? Also, last in my pictures is one of the inverter boards I pulled out of one of the power-packs. I cut the second outlet off and wrapped the first one in tape just to make sure I dont' shock the hell out of myself. I have my truck battery sitting inside over the winter, and with a good 12.71v, I thought it would be the perfect battery to try the inverter on. I brushed the wires onto the top terminals of the battery and although I could hear a bit of sparking, I saw nothing and the indicator light on the power switch didn't light. The volt meter also showed nothing from the 120v outlet. So I tried shoving the wires into the bolt sockets that the truck's wires bolt into, and I quite literally startled myself as it emitted a really loud BEEEEEEEEEEP, I nearly jumped through the roof. The indicator light turns on when I flick the switch to I and I can hear the transformer making a little buzzing sound. However, when I measured the AC voltage from the outlet, I didn't write down the voltage, but it was around 3v? Not even quite that much. I'm not sure if the inverter is screwed or if it has something to do with the switching nature of power inverters causing my multi-meter to not read it right? One other thing I will note is that I had to cut the power switch leads to remove it from the case, then re-solder the switch. The switch has 2 black wires and one red, I tried my best to make sure that each black wire went to the terminal on the switch it came from, and I assume if I didn't hook the switch up right, it wouldn't have lighted up or anything right?? I don't want to try plugging something into it for fear that it will blow up in my face, at least not until I know it's functioning like it should be, however I doubt these power packs were throwing out for failure of the inverter... *On the side note* I apologize for these (sometimes) rediculously long posts or just mundane questions. However, I like to be thoughrough with my questions so that there are very little questions asked, about my question, in the first place. As it seems to waste a lot of time asking for details about this or that problem, when you could just throughly explain it all in one go. This is what I try to do, so there are no blank spaces for you guys to try and "assume" where you don't know the proper information. Secondly, I've really appreciated the help, and sometimes just the helpful and creative ideas I hear from others, makes me feel good, like there's actually some people on here that know what they're doing and I can trust their answers (Nacho, kiteman, caitlyn's dad, 1010100100, all of you regulars, have been great help to me) *End of girlish requiem*

Topic by Punkguyta   |  last reply


PIC QUESTION

I am new to programing and was wondering if there is any way to read the code off a PIC chip without damaging it or if you plug it into a programmer will it destroy the data on the chip. Sorry if this is a stupid question any help would be most appreciated

Topic by xlbloodlust   |  last reply


Where are the questions? Answered

Just noticed that nothing is left in our recent answers section... ;)

Question by Downunder35m   |  last reply


arduino Questions

Silly question. Trying to build something that requires an arduino to take a temperature measurement, and pwm an Item dependant on that temp reading. so the question is how many reads and adjustments per second can I aim for? I was hoping to get the 1 MHz area but am assuming less than that at this time

Topic by plucas1   |  last reply


Diode question

I need help with diode. Actually a question: if you put diodes in series for example 2 diodes of 300 V will they act as one diode of 600 V?

Topic by Dantex   |  last reply


Stupid question but... Answered

 i won a 3 month membership, how do i activate it?

Question by signposts   |  last reply


question in batch

How do i make scenarios like it randomlz choses a scenario that zou put in some where

Question by RoyalR5   |  last reply


Soldering question? Answered

Is soldering pronounced [ SAW - TERING ] ? I was told this, but it didn't make sense to me that it isn't pronounced how it is spelled.

Question by VinceJDJ   |  last reply


A question of impedance? Answered

Say i have an amplifier that takes a load of 8 ohms on each channel. Would it be ok to exceed the 8 ohms?

Question by thewizard42   |  last reply


electrical question

How do I rewire the power cord to a Thermadyne 38 plasma cutter power switch, not having a cord to begin with?

Question by tamban282   |  last reply


The Last Question

Well, upon my wonderings today i came across this, a short story by Isaac Asimov.The Last QuestionFor a short story, (about 20min - 1 hour read) i found it was pretty good. Most of us are familiar with Isaac Asimov for his three robotic laws. For any sci-fi fan, this is a must read. Im now looking into some more of his writings.

Topic by gmjhowe   |  last reply


Coding question Answered

In this line of code the N and Y have single quotation marks around them, what do they do?  if (goodOne == 'N' && buttonPushed == 'Y')

Question by WWC   |  last reply


attiny2313 question?

Is it worthwhile to make a timer for hydroponics watering using an attiny2313? What level of complexity should I take it to so that I can use it's full capability.

Question by artworker   |  last reply


power question ? Answered

I need to get 36volts for something in my boat. How can this be done? Cant fit anymore battires. Easiest way to stepup 12volts to 36 volts.

Question by kurt1968   |  last reply


stats ? question

In your stats it shows you  within instructables and the other options are other and search engines . Is there a way to find out what search engines and sites are looking  ?

Question by coolbeansbaby68   |  last reply


Aruino question Answered

I have the arduino uno and i wsa wondering if there is a way i can get it to 3.26 mhz pulse? I don't care if it involves electrical parts.

Question by jbaker22   |  last reply


stats question

 Is it possible to find out where your views are coming from other that within instructables ? The other options are  search engines and other ? Can you find out where there coming from ?

Topic by coolbeansbaby68   |  last reply


Arduino question? Answered

I got the adruino uno recently and i am still learning how to use it. I was wondering if anyone could show how to program it to send a pulse out at the highest voltage and 1Khz continuosly.

Question by jbaker22   |  last reply


Membership question.

I was online looking at your website and want to know why does the cheapest $1.95 / month membership get 15 digital patches while the $2.95 / month membership only gets 3?

Question by  


LM386 Question? Answered

How critical is the .05uf capacitor in this diagram? Can a .1uf capacitor be used instead? I know the 250uf electrolytic capacitor can be replaced with 220uf for coupling, but not sure what effect using a .1uf in place of the .05uf would be?

Question by keydogstony   |  last reply


Android Question? Answered

I have an Archos 5 tablet, which is not Google certified, so I can't get market place on it.  Does anyone know how I could watch netflix streaming on it without installing it through market place?  Thanks!

Question by thegeeke   |  last reply


Motor Question

I have two motors I am using as wheels, but they both spin in the same direction making my robot spin in circles. Can I change the direction a motor spins? Maybe by switching positive and negative sides?

Topic by Soileau   |  last reply


Cnc questions

Hi, I saw this post at instructables about building your own cnc machine at home and i pretty much got interested.I have just few questions though. Can i make a medium sized cnc machine using that method ? Are there any standard dimensions for the cnc machine  or i can use my own ? I am new to G code so where should i start to learn ?  Which material is best preffered for a medium sized(should fit on my desk) machine ? Sorry if these questions sound a bit odd to you but i have no knowledge about cnc. Thanks

Topic by kawal24   |  last reply


solar question

Do solar panels have to be in direct sunlight? I'm looking to make a "Sun Jar" and was wondering if it would work on my balcony. The only thing is our balcony doesn't get direct sunlight to it as it's inset into the building and covered by the above apartment's balcony.

Topic by mrshow555   |  last reply


LED question

If I have a 3.6 volt battery should I use a 180 ohm resistor to get 20 mA to a 3.6 volt LED? I got that answer from 3.6 = (180)(0.02)I'm asking this because online LED calculators disagree with me and say to use no resistor. also the battery might output 4.5 volts when extremeley fully charged, so I want the LED to have protection of not blowing out.

Topic by guyfrom7up   |  last reply


LED question

I just bought some LED's that i plan to run through a wire on a 9 volt with a push button on/off i plan to run 6 at a time. the green are 525nm 8000mcd and the blue (A SEPARATE SET) are 472nm 2500mcd

Topic by pbpenguin5   |  last reply


Sensor Question Answered

This is a hypothetical electrical circuit question, I'll try to clarify as best as possible. If you had a circuit hooked up to a light bulb, but controlling a the light bulb were two sensors wired into the circuit. One sensor turned the bulb on when there was no light, and the other turned it off when there was light. I'm not sure if that would be all one sensor, but garden lights work somewhat like that. Anyway, what if the sensors were mounted directly in front of the light bulb, facing it, so they worked based on its light. What would happen when you turned it on? Would it act like a strobe light or just explode, and would the effect be different with LED's? Also, would you need to put some other mechanism in to slow the sensor's signals?

Question by Wasagi   |  last reply


Acoustical Question

Is there an acoustical property that makes sounds seem like they're coming from a different source? Like say I have a box 5 feet in front of me. I trigger the sound, but the sound doesn't seem like it's coming from the box, it seems like it's coming from the left/right/behind. Any ideas?

Topic by Jackhole 


a couple of questions

I have a greenlee multimeter and i cant get it to give a read out it just stays at 0 it was working fine then all of the sudden it will not do anything any ideas as could be wrong? resistors? does it matter which way they are connected and when i hook one to a power lead and stick a multimeter on the other side the voltage should be different right?

Topic by LoveforBlueFarms   |  last reply


Ideas and a Question

I have a couple of suggestions for new instructables features. Here they are.1. Add a button for rating the difficulty of an instructable, and one for how long it takes. Put them beside the rating buttons.2. Let me add groups to my favourites.3. Create somewhere where people can sell their creations, kinda like etsy -- Loads of people are selling stuff on etsy, and could be doing it right on instructables.***NEW IDEA*** 4. Find some way to get rid of the ads. They keep confusing me.And finally, a question:Is there anywhere where I can buy an instructables multi-tool or shirt? Or do I have to win one? If there's no shop, there should be one.

Topic by threecheersfornick   |  last reply


Voltage question

I'm building a electric anchor for my boat. I'm using an electric actuator thats rated at 24v to 36v. I need to step up the power. my boat is only 12v. I was going to use a stepup converter. Found one  12v in and 48v out. Is there a way to control the voltage so i can tune it down to 36v. Also would there be a big difference running it 24v verus 36V?

Question by kurt1968   |  last reply


Microcontroller question!!!!

Non of the online tutorials are helping me, How do i set a high/low output to a SPECIFIC pin on my AT2313 tiny??? All I fine alone is OUT PORTD,0xFF which sets ALL ports on portD to high 255 aka OFF. But How can i set like pin 4 (PD4 aka PortD 4) and not all portD? someone help me!!

Topic by Killa-X   |  last reply


Pushbutton Question Answered

I have been taking apart Gameboys and keyboards. These devices have buttons or keys that you push to play a note. When I take it apart, I dont see pushbotton switches like id expect. Instead I see a rubber form with a little black dot on it, and when you press it, the black dot touches a black surface on a PCB. Anyone know how this works?

Question by crocboy   |  last reply


VB question

Hi all. I am new to Visual Basic and am wondering how one would make a VB eBook reader. PLEASE READ! i know it can be done, i just haven't found a tutorial for making one. I have virtually no experience working with VB and little experiance programming. If you know of a link to a tutorial of this nature, PLEASE tell me. Thank you.

Question by dungeon runner 


A question on fans Answered

p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0.0cm; font-size: 11.0pt; font-family: Calibri , sans-serif; } span.EmailStyle15 { font-family: Calibri , sans-serif; color: windowtext; } *.MsoChpDefault { } div.WordSection1 { page: WordSection1; } Hi,   Would this setup work ?   Using four standard pc fans, if I was to mount them opposite each other, blowing inward, in each of the spigots (side ports) of the fitting in the pic attached and blocking up one end, would I get a useful air flow out of the open end, or would the fact that they are blowing toward each sort of cancel each other out.   If it makes any difference the main body of the pipe is around 110mm.

Question by Squibo   |  last reply


Transformer Question? Answered

Hi, I want to plug this transformer I have into the wall to be able to use its output to power several of my other projects. I need a way to limit the current from the mains power supply into the transformer, it has to be limited to about 1/2 an amp. I really don't want to lose any voltage though, and when I use a resistor to limit the current it sucks down all the voltage and overheats. I really need some help with this. Thanks

Question by transistorguy   |  last reply


RFID questions

I am wanting to create a fun RFID / NFC device that will detect when different people walk into a room. We all have individual RFID door tags to open a door so I was wondering what the range was on RFID, would the person need to tap their fob or is RFID strong enough to detect if somebody is just carrying the fob in their pocket? If the RFID isn't strong enough, could I use something in their phone to detect them? Bluetooth maybe? Everybody has an iPhone, could I detect something on that? Any thoughts? Thanks. Phil

Topic by filthyPhil   |  last reply


License question... Answered

I am currently in the finnishing stages of a new aluminium print nozzle for 3D printers. Of course I would like to share my project here soon but I also would like to see if it has any commercial value. I would only be able to make a very small amount of them each month and the hours I have to spend in my workshop for it would not be justified by any price. So if someone would have an interest to mass produce this nozzle what would be the correct type of license to choose from when publishing the Instructable?

Question by Downunder35m   |  last reply


Wiring Question

Ok, I recently purchased a Go-Ped for practically nothing, and I really, really, really want to fix it up. I want to mount a couple of LED powered bicycle headlights on the front, and a tail light on the back. However, I want to be able to turn them all on and off via a single switch, mounted to the handlebars.I know very little about wiring, but I do know that most bicycle lights require physical pressure to power them on or off. Maybe there's something that can go between the batteries and bulbs?Any input you can provide would be fantastic!-Ryan

Topic by ryry214   |  last reply


Electromagnetism question Answered

Hi I just saw something weird, it's not an exercise or a problem but I still have a question :  Let's say we have 2 electromagnets of unequal strengths X and X+Y; between them we have a ferromagnetic bar  Let's say one has south polarity and the other one north if we change which one is stronger ex 1st is X,  2nd is X+Y than a moment after 1st is X+Y and  2nd is X the bar will have the polarity of the stronger one for a moment, right? ex for a moment the electromagnet with the south pole is stronger X + Y = the bar will become south pole than we return it to its normal strength X and make the north pole electromagnet stronger X+ Y= the bar will become north pole, right? How will such variations of the strength of the magnetic field on 1 side affect the entire device, will only the bar change its polarity and it will stop somewhere on the border of the second magnet or will the second electromagnet change it's polarity too if the first one's is very strong? (just wondering) If we fix a coil on the ferromagnetic bar will such variations in the magnetic polarities of the bar induce current in it and how much, as much as we used to produce the fields of both electromagnets or only for the field of the stronger one, or only the difference between 2? and the last question in the terms of relation between the strengths of both electromagnets (let's say in %) how much Y should be to change the polarity of the bar without affecting the polarity of the second electromagnet?  Thank you all in advance for your interest, assistance and time :)

Question by Elys   |  last reply


MCP2210 Questions?

"Don't believe everything you read on the internet" - Abraham Lincoln Such wise words I should have heeded.  Anyhow I have my MCP2210 wired up correctly now, the computer recognizes it, configured using the MCP2210 Utility and the GPIO pins have been tested and work through the SPI Terminal that I downloaded for another product related to this from Microchip. The question I have now is how much farther can I take this?  I started with this IC because I know (some) Arduinos use an FT232 USB to UART chip to connect USB to the Atmel chip they use.  I recall most Atmel MCUs can be programmed using SPI, so I figured I would try this out.  I also hoped this would delve into software so I could teach myself a bit about that as I am more familiar with hardware and building circuits.  If everything worked out I wanted to use these with an MCU so I could make myself custom small USB programmable boards for projects.  So would it be possible to program an ATTiny or ATMega through this using Atmel Studio 7.0?  What am I missing if it can be done?  What should I be researching next?  Anything to point me in the right direction is appreciated.  If this is not feasible, alright, what other applications would these chips as I have a few more of them?

Question by Electric Spectre1 


Mosfet Question

Hey guys, I am doing the arduino controlled rgb leds (1 watt leds) project and I am going to use mosfets for the leds. I ordered 3 IRF540 mosfets, 1 for each color of leds (Red, Green, Blue). the arduino is going to use pwm to control the leds but the arduino can only supply 5V at 40mA max. The mosfet have gate-source voltage of +/- 20V and a gate-threshold voltage of 2.0V to 4.0V. Do i need a driver circuit between the arduino and the mosfets and if not is 5V sufficient to run the mosfets in pwm? If i do need a drive circuit, does someone have a schematic since i am inexperienced at electronics? Would i need a heatsinks for the mosfets? thankx for any insight...

Topic by Slisgrinder   |  last reply


usb question

Hey i saw some videos on diy usb fan, thought it was a great idea, so i tried to make one too for funso i took my old broken logitech usb mouse and cut it open, however when i opened it i saw black, white, red, green, a string, and a copper wire - like the picture on the imageshack link (sorry for the blurr)http://img144.imageshack.us/my.php?image=dsc00210dk5.jpgso i still only use the red and black wire right? and in what conditions should i not use the usb for powering (such as the product uses more than 500 milliamp?)and just out of curiosity does any1 know whats that copper wire with no shielding is for?thanks

Topic by aman0   |  last reply


Transformer question?

I took a part an ooooold boombox and got some cool parts from it, one of them being a heavy, good-sized transformer. The boombox was using the transformer to step down the voltage before rectifying it.(Right before rectification it goes through a 500mA fuse if that helps...) From what I can tell, the mains power is connected directly to the transformer. I tested it with low voltage AC source and found that it is roughly a 10:1 ratio transformer. I wanted to reverse this and use it as a step-up transformer, but I don't feel comfortable hooking it up directly to mains in case it draws too much current and flips a breaker or something (I read a biography of this one dude and when he was a kid he tried to make an electromagnet using mains power.... knocked out the power on the whole block and the police came...). Will it draw too much current putting it on the low voltage side? I saw one guy say that using a 50 ft extension cord will prevent it from drawing too much. Will that work? If not any other ways? (or just not worry about it?) edit: It is roughly the same size as this one  https://www.instructables.com/id/LM3886-ChipAmp/

Question by 7654321   |  last reply


Thinkpad Question

Hey guys, I just re-installed my thinkpad r51, and I've been having all sorts of problems installing the drivers. I have a video driver finally from windows update but the actual driver package I got of the site for it still doesn't want to install. My wireless won't install either. Lenovo offers 3 different drivers for my particular model and I've tried all three, the first two said they were installing it, but nothing happened, third one installed and it worked as far as the installation but for whatever reason it got very very very slow like there was some dead device holding my computer up. As soon as I uninstalled it, it was fine again, and no I could not manage to even try the wifi because it was so slow, got the window open a few times but it crashed. I have no bloody idea! I've already reinstalled this machine and everything was fine, and all the driver packages installed not a problem. I definatly need the driver for my wireless and the video driver will be helpful so I can control the outputs (seeing as it's a laptop with 3 diff video outputS)

Topic by Punkguyta 


Wiring question?

Hi everyone. Long time visitor of Instructables, made a few items I've seen and my most recent project was adding a star power pedal to my guitar hero controller. I bought a audio extension cable with a male and female jack, 1/8th size. I cut the cable about six inches from the female end. I stripped about an inch, inside was a bundle of copper wire wrapped around a clear insulted wire. I twisted the exposed copper wire and tinned it, I stripped the clear housing and twisted it, tinning them as well. I tinned the exposed wire to the GND, and the clear to Select. Positioned the jack and everything went well. I took the male cable, connected it to momentary switch and connected the male cable to the female jack. Turned on the system and controller. Got star power and hit the switch with no response. I'm very confident in my soldering and know I did it correctly, so I was wondering: 1) Are these kind of cables capable of doing what I intend? 2) Maybe the GND or the Select button are shorted out on the board of the controller? Thanks for any help everyone!

Topic by Mercenary Wubby   |  last reply


Copyright Question

I recently got into this amazing song called 'Sad Machine', and I have what I think is a really good idea for an AMV.  My only problem is- you guessed it- copyright issues.  I'd like to make it in my animation software and upload it to YouTube, but from what I've heard, it's hard to get a request for using a song in a video noticed, let alone accepted. According to YouTube: "1. The purpose and character of the use, including whether such use is of commercial nature or is for nonprofit educational purposes Courts typically focus on whether the use is “transformative.” That is, whether it adds new expression or meaning to the original, or whether it merely copies from the original. Commercial uses are less likely to be considered fair, though it’s possible to monetize a video and still take advantage of the fair use defense." I think I may be covered here, since I do not have monetization enabled, and my idea completely different from the official video.  Then there is this: "Uses that harm the copyright owner’s ability to profit from his or her original work are less likely to be fair uses. Courts have sometimes made an exception under this factor in cases involving parodies." For what I have in mind, I don't think it would take away from its profitability. I realize that without a visual of mine it's going to be tough to determine, so what I'm thinking is storyboarding then sequencing it to the song on another platform.  Maybe then you could see what you think.  I value your current input very much, though.

Question by StarscreamClone   |  last reply