Can speaker wires be used for power transmission?

I am making my own bicycle light and I decided to use 18 gauge speaker wire.  Speaker wire works well because positive and negative are glued together in the insulation.  It makes for a cleaner wiring job.  I am using the RCA plugs as well.  The light runs at 4.2 volts and 1.5 amps.  Speaker wire is not designed for power transmission but I can use it for that purpose can't I?  Do RCA jacks have a significant amount of resistance?  

Question by Noblenutria   |  last reply

single led light bulbs?

I have some single led light bulbs. I want to string 113 of them. they're 1.5 watts each and 12dcv. what transformer and gauge of wire should I use? G4 socket. there's 24 led's in each light. they're pretty small.

Question by ron.stone.733   |  last reply

What is 3d wire? Answered

I have heard this term from an instructables member and I would like to know what gauge if any I can use to ground my tesla coil.

Question by nerd7473   |  last reply

What gauge wire should I use for doing circuit board work?

Particularly the motorized window blinds controller.

Question by    |  last reply

How many strands of 17 gauge wire twisted equal a 12 gauge wire (approx)

Hi,  I need a 12 gauge wire for the positive side of a small perimeter electric fence. However the only size aluminum wire they sell locally and I bought was 17 gauge wire. My thought is to twist the entire length of two or more strands of the 17 gauge wire together to equal the 12 gauge wire (approx)  How many strands of 17 gauge will it take to do so? One more related question while I'm at it. Does the twist have to be a tight twist or can it be a loose twist? Tight meaning a lot of twists per foot, loose meaning something like 4-6 twists per foot. tia - chase -

Topic by -chase-   |  last reply

what fuse to use or gauge wire to act as a fuse?

Im making a battery powered coil gun.. each coil draws about 180-200 amps of a pulsed current. I want to know what fuse ratingi should use to protect the circuit.? or if there aint such a fuse.. what gauge wire should i use as a fuse..

Question by icey.hood   |  last reply

Moving the flash off the circuit board of a disposable camera. Gauge Question.

Got a project in mind but looking for some advice.  I want to reuse the innards of a few disposable cameras but I want to move the flash units off the board onto a separate frame to get the flashes closer together.  The brackets that hold the bulb to the board are metal blades but if I was to remove those and replace them with wire, what gauge should I start with? Thanks

Topic by wiredcur   |  last reply

Capacitor/wire problem... Samples?

I am making a coil gun(like the instructables). I have everything good right now. but i need a way to get about maybe 16 gauge magnet wire and capacitors free(like samples) I have been needing wire and any wire is welcome to me. For the coil gun does magnet wire work the best or do you need normal copper? I want to get these for free please. like companies giving free samples. please send sites.(need free shipping as well please) ausi

Question by Ausi319   |  last reply

Analogue Gauge Readout For PC Audio Answered

How can I use 2 of the "Cracker Box Amp" circuits to drive standard analogue gauges from the audio out on my computer.  I will use 2 gauges, one for left channel and one for right. I want the gauge to show the amplitude. If I just wire up a gauge to a channel on the audio out then the needle will simply move as if it were a speaker. As I said before, I want the gauge to show the amplitude.

Question by physics_dude   |  last reply


Is it better to run 120v wiring to each pot, or run 2 wire 18 gauge cable to a central box. LED's are 12v 3w dimable. I would like to dim from 2 to 10 pots per switch. Where would I put the transformer. Could you suggest a  wiring diagram.

Question by NEIDO   |  last reply

Current and voltage ratings in dc plugs and wires? Answered

I had this great idea to turn old cell phone chargers into DC extension cords.  Cell phone wires are nice because of their curly spring wires.    I worried the wire gauge might not be large enough to handle my project.  Here is my question.  On websites that list current ratings for standard wire gauges, they list current limits but not voltage limits. Why is this?  If a 22 gauge wire can handle .92 amps does it really not make a difference whether it is 1 volts or a million volts?  Why don't they use watts to list how much power a wire can handle.  Watts take both volts and amps into account. Another mystery is that my DC plugs are rated for 6-10 volts.  Why are the plugs rated for volts but not amps?  What would happen if I used these plugs for 4 volts, which I plan to do.   Thanks -Jacob

Question by Noblenutria   |  last reply

How are we able to know the variable of a Strain Gauge? Answered

Hi, for a school-project I need to measure the weight of an object. Therefore I am using an old weight-scale. The component wich includes 2 Strain Gauges has 2 seperated wires coming out and 1 other wire conected to the Ground. Because we can't find something changing when we measure differend kinds of things, (for example the changing resistor-value) we hope that you can help us. The two wires coming out of the Strain Gauges are connected to an Amplifier (TL081CP). The scale itself is a KRUPS TYP 841 ; 871-B Thanks!

Question by zupperzipper   |  last reply

what is the relation among them?

Hi my good friends want to ask a simple question i want to make an electric heater. what is relation between wire length and gauge of nichrome wire for use in heaters. how gauge and length of wire can effect the efficiency of heater output. is there any other wire that have more heating output than nichrome wire? thanks all and love u waiting for your kind replies.

Question by waqas12345   |  last reply

How to wire a 12 v dc pump?

 12 volt 16.5 amp dc pump to a 12 volt power source with a 20 amp fuse...battery on motorhome is 35 feet away.  Instructions for flojet motor say to use 10 gauge wire if more than 25 feet.

Question by ruawake   |  last reply

Connection of VERY short nichrome wire? Answered

I have a VERY short piece of 32 gauge nichrome wire that I want to connect to 2 copper wires. When testing, I have connected them like on the picture, using tweezers and a pair of pliers. But I really need to find a more professional and durable way of doing it. It's important to keep as much as "free" nichrome wire as possible in the middle. I don't want to waste all the length inside a butt crimp, or wrapped around the copper wire. Is there a tiny, minitature terminal somewhere, that only steals 1-2 mm of the nichrome wire? Or am I wishing for something impossible?

Question by karolina81   |  last reply

What voltage can heat gauge 24 nichrome wire 30 cm long successfully? Am building a polythene sealing machine

Am building a polythene sealing machine using nichrome wire, I use 9v battery but is not heating. What voltage should I used and can I use ac or dc

Question by Gopep   |  last reply

Where can I find 4 AWG wire? Answered

I got my microwave, and now I want to make a spot welder. Any recommendations for where to find 4 AWG wire, or something similar?

Question by CameronSS   |  last reply

How to get 300 degrees?

 The Makezine Weekend Project on the portable heater said that 3 volts (two AA batteries) with 30 feet of 30 gauge wire will give 100 degrees F. Will the same setup with only 10 feet give 300 degrees? If not, is there a way to do this with minimal changes? Either way, will the setup do anything annoying like the wire stop heating and the batteries start heating up or the whole thing melting? Thanks!

Question by cowmanpoke   |  last reply

Fireworks Ignitor

I'm looking to make a bottle rocket igniter, and I am trying to fit it in the smallest package possible. If I were to use the circuitry from a stun gun, and connect it to some 16 gauge nichrome wire, could it heat up the wire enough to set off a firework? I could also use wire of a different gauge(32-40) if necessary.

Topic by H20 

Tesla coil? Answered

What gauge wire do I use for my secondary coil

Question by wiccakingkamui   |  last reply

how do I bridge a stereo car amplifier?

Http:// this source say that my amp is bridgeable and that it can run stereo and mono simultaniously. It is a 2 channel amp, however I only have one speaker.. I need both left and right channels running into the speaker. How can this be done? What would be the impeadance if the amp is running at 4ohms and the bridged subwoofer speaker is 4 ohms? what would be the overall wattage? how do i do this without causing damage toi my sub,amp, or radio? does this put excess strain and/or heat on the amp? if so how do I fix this? is there any wiring gauge problems that i should be concerned about? (18 gauge for input power, 18 gauge for speaker output, plan to lower the gauge of the speaker to somewhere around 12 or 14)

Question by fastcar123   |  last reply

Electromagnetic coil design, effect of wire AWG and turns.

I made coil of core length 28 mm and wire gauge 38 and 1850 turns but i am getting very less magnetic compare to other coil of core length 21mm, 28 AWG and 1000 turns. Could you please sujjest what might me the problem. And current we are giving is up to 0.5 A.

Question by ಗುರುತ   |  last reply

Need some help choosing wire for a project

I'm making this It says to get magnet wire and 12 gauge paired AWG wire.  Home depot said they didn't have it.  Can I reuse any wire from lamps that I plan to get rid of? I found magnet wire on ebay but which one do I choose? Is this the 12 AWG wire? or this? Videomom

Topic by mazelady   |  last reply

Simple electrical insulation question. Answered

If I have a 10AWG insulated solid copper wire and the THHN insulation is rated for 600V, should I worry about a 5000V 60ma current arcing straight through the insulation if its coiled in a helical form?

Question by imMrDude   |  last reply

Need help constructing a transformer!!!

Here are my specs and anticipations for my homemade transformer: Im looking for my transformer to produce a voltage of 400vAC out of a standard 115vAC wall socket. If ive done my math, and this is where I would like do correctig if noticed I need a turns ratio of 1.2 : 3.5. That is 1.2 to 3.5 or 115 turns of primary and 350 tunrs of secondary. 115 X 3.5 = 402.5vAC respectivley. I have access to a fero-core so thats not a problem. Im using 22-20 gauge wire for the primary and 18-16 gauge wire for the secondary. If you find my wires to be of incorrect gauge please let me know. I realise 18-16 is rather large for a coil but I was trying to keep safety in mind do to the high voltage.

Topic by darthDIY   |  last reply

Reuse old motor from cement mixer for building coils in the axial flux alternator for diy project 1kw wind turbine? TIA

 The coils in the alternator are meant to be 14 gauge enameled wire, does anyboedy know if the wire in other ac motors like the one in a cement mixer use this type of wire? Cheers!

Question by llucop   |  last reply

To change Magnet coil 240 volts ac to 120 volts ac Answered

 Hi  All,,, I have a motor an aquarium air pump 240v ac 3 watts Supposing this motor winding with 3000 turns 32 gauge wire. Now I like to rewinding for 120vac.(3watts ) Please help me to know :  - Must  rewind 1500 turns with 32 gauge wire  or other way....                                                        Thank you in advance for your time and sorry my English not well.                                                                           Lam                                               

Question by lam   |  last reply

Help! Flash/fiber optic wire question

Help help! I was following the instructions at to fix a flash on a camera I got on ebay. All was going great until the black wire came out. I tried putting it back in and got a terrible shock, and the flash no longer worked. So I thought it was a grounding wire. I tried to strip it and put it back in its little holes, but it did NOT want to strip. Downloading the service manual later showed me that it didn't want to strip because it's really fiber optics in there. In trying to fix it some more, I got shocked a few more times, pretty strongly (with the battery out, even). I'm not sure if I've fried a component or not, but at least nothing smells bad. I'd like to try to put a new fiber optic wire in there, but I have no idea where to find one. Can anyone help me? The gauge of the wire is pretty standard for small electronics. Please let me know!! Susan

Topic by susanrm   |  last reply

Jule thief transformer issues. Answered

I'm trying to make a Jule thief, I set up the circuit and tested it using a salvaged transformer and it works fine the only problem is that the salvaged transformer is kinda large. So i decide to try to make a smaller transformer using a Radio Shack T4452-1R2L choke and 26 gauge magnet wire. i managed to fit 15 pairs of windings onto the T4452-1R2L Toroid, but when i tested it the led won't light up. I tested the wires for shorts using a multi-meter and even tipple checked that it was wired correctly. Is this Toroid just not suitable for use in transformers of this kind or do i need to use a smaller gauge wire or is there something I am overlooking?

Question by FrozenKnight   |  last reply

Could someone tell me exactly what resistors/DC transformer/gauge copper wire I need? Maybe even provide some links?

So I'm trying to make this: and I bought 20 of these Blue 10mm superbright LEDs 1025LB7C Could someone tell me exactly what resistors/DC transformer/gauge copper wire I need? Maybe even provide some links?Maybe even provide some links?

Question by shyguy567   |  last reply

The force of the coil without iron core Answered

Dear All..  If two coil A and B without iron core same as (size) dimension  and but coil A winding with 28 gauge and coil B with 32 gauge magnet wire Please help me to know : What is name coil more force for  attract a piece of ion metal. Many Thank you                                                                            Best regards                                                                                         lam

Question by lam   |  last reply

MOT confused?

Been watching a lot of videos on youtube about increasing the voltage on Microwave oven transformers!. what i cant undrstand is when people take out the secondry windings of the transformer & replace it with a few turns of 10 gauge wire to increase the power how does it work? as from  what i've seen the 10 gauge wire still has the insulstion on it so how does the current cant get through to produce extra power?. Also what do the shunts do in the workings of the transformer?. can anyone explain this to me in laymans terms!. Thank's, Tezza1.

Question by tezza1   |  last reply

How would I find the maximum Voltage & Amperage/Wattage of any piece of wire if I don't know what gauge the wire is?

For example, I have want to take some wires out of a spare 200 watt PC power supply to use in one of my projects. How would I figure out what the max Voltage/Amperage is of each piece of wire that I remove? Would the "Ohms" setting on a digital multimeter work?

Question by BucketBasher   |  last reply

Search coil anatomy?

I am in the process of making a metal detector and have come to the point of making the search coil. My question is about the contruction pattern, wire gauge, wraps, and housing material (mostly what not to use).

Question by Dauntless   |  last reply

How can I improve my coil gun's coil? Answered

My coil is made of 22 gauge wire and the inside diameter is about 1/8 in. It's 1 3/4 in long with about 7 layers. The ammunition is a little over an inch and fits snugly inside the coil. How many more layers should I make it, and what else can I do to improve it?

Question by cardboarddude   |  last reply

Best way for Grounding large(REALLY Large)circuit ? Answered

Could someone tell me how to ground a large electrical circut.I have a die-cast aluminum box, on which there is a strip wire connector which connects all the tiny goundings on the circuit and finally to one terminal.Now, what wire to use for grounding, about 18 gauge or so?I have no idea ,but is is better if the wire is NOT flexi-type.I want it to bend(and stay so) into different angular bends(not a curve)Also i need to put a copper tube on the end of the GND wire, how to attach it to the wire,by screws?? I put pic of non-flexi wire in the post too

Question by mhkabir   |  last reply

12v dc nichrome electric heater

Hi friends i want to make electric heater that could give sufficient heat with 12 volt dc battery. how much nichrome wire in lenght should i use and how much gauge of nichrome wire should i use. i love for your kind replies. love u all

Question by waqas12345   |  last reply

How can I color aluminum wire without annodizing?

I bought a spool of 14 gauge aluminum wire for chain maille. My goal is to have alternating black and natural colored rings used for the maille. In a household metal working book I found from the 80's, they said to,"Mix 2 tablespoons lye into 1 quart cold water. Add aluminum part for 1-2 minutes. Submerse part into household dye mixed according to manufacturers directions until desired depth of color is achieved. Rinse in cold water".I tried this method using RIT black household dye; however, it was not successful. I am trying to dye the wire both RED and BLACK. If no method for the red is found, I can purchase a short length of anodized red wire; however, If there are any chemical reactions for turning the wire black, that would be great. Thanks!!

Question by kreationism   |  last reply

Quadcopter using 12V battery and Wood Screwers

I’m currently attempting to rebuild the quadcopter demonstrated in the link below: The materials I have are as follows: • SMAKN Buck and Boost Voltage Converter • 20 AWG Flexible 1007 Wire Electric wire 20-Gauge Copper Hook Up Wire • 2300KV 2204 Brushless Motor CW&CCW; • 12V 7 Amp EXP1270 Rechargeable Lead Acid Battery • Carbon Fiber Propeller • Digital Multimeter Attempt 1: We connected a motor to the 12V battery using clamped wire connects – there was a lot of sparking and the motor did not spin. Attempt 2: We connected 2 motors in series – connected the motors and the 12V battery to the buck boost convertor – which resulted in the battery smoking and the buck boost convertor burning out. Can you watch the video and explain to me the wiring aspect to the quadcopter - I believe I may be missing necessary wires such as a female insulated connector that connects to a terminal wire which connects to the 4 motors in series but I’m not sure.

Question by anthnymccld8   |  last reply

[Coil-gun]What is size coil will work best with my capacitors?

I am building a Multistage coil gun and have some 450v 1000uf capacitors. I understand it is important to have the wire size and amount of turns correspond to the capacitor for maximum performance. I have also figured out that the coil should be about twice as long as the projectile. My projectile will be part of a nail.What gauge wire should I use and how many turns should my coil be? 

Question by eskibro830 

Does it matter how a coil is wound? Answered

Hi everyone, Take a look at the illustration attached.  Is there any real difference in values between the four winding types? *** Assuming same core, same wire gauge and same number of windings on all 4 primaries, and all 4 secondaries *** A) Both primary and secondary are wound TOGETHER. B) primary is wound first, then secondary wound ON TOP. C) Primary and secondary are wound at OPPOSITE SIDES of the core . D) Primary and secondary are wound next to each other on the SAME SIDE of the core. Note that figure in D it seems like the wires are thinner, but I assure you, that's an optical illusion, and the gauge is the same in all 4 figures :-p Again, the question is whether the 4 coils would act the same in a circuit, or is there a difference in values between them? Thanks!

Question by Morgantao   |  last reply

Ok, well i wanna make some kind of simple EMP gun. Is that possible?

I saw some other forums that talked about it, and i would just want some that could disrupt something at close range, or something like that. I have heard of using a firecracker... but i don't think that i want to do that in public... xD maybe a disposable camera and some wire?? I have some enamel-covered solid-conductor copper wire, 30 gauge....

Question by charchar97   |  last reply

My First Tesla Coil!

I just made my first tesla coil, it stands only about 6 inches tall and has a diameter of ~1". The tank capacitence is ~940 pF. The wire gauge is 30. The topload is 6 inches in diamerer and 1 inch tall. the power supply is a 7.5kv, 60mA NST with a terry filter. It's a static spark gap. The primary has 13 turns of 14 gauge wire, it's a 30 degree cone.It gives out nice arcs and cornea. I will post photos and video soon, as my workshop reeks of ozone right now.I can probably get better preformance with using thicker (or no) aligator clips (prototype stage right now) and if I change the primary. The wire got too hard to turn, so near the center there's like 2" of leeway on all sides of the secondary... sorry about sound quality in the videothe rod in the video is kinda grounded. The rod you see is a thin copper pipe taped to a 3 foot, 1/4 inch thick dowel rod that I'm holding onto.

Topic by guyfrom7up   |  last reply

12 2.4V lights in parallel, how do I wire it to a wall wart?

I have twelve 2.4V flashlight bulbs in some lovely ceramic fixtures that I have wired in parallel with quite a bit of 26 gauge solid wire (6" between each bulb and about 7' to the power supply). Despite them wanting 2.4Vs, 3Vs supplied with 2C batteries makes them only dim. I want to hook them up to a wall wart but I have had no success. 5V and 3V wall warts do nothing. I tried two others that worked for a while then burned out: AC Adapter INPUT: 120V ~ 60Hz 11w OUTPUT: 7.5VDC ===900mA MODEL: SCP48-75099 CLASS 2 TRANSFORMER AC Adapter MODEL NO: AD-091A INPUT: 120V AC 60Hz 15w OUTPUT: DC 9V 1Amp Condor I just got rejected from a juried show because it died as the jurors were looking at it.

Question by rebeccabbennett   |  last reply

A powerful EMP generator, to disable (temporarily) stereos in my neighbors house.

Hey guys, I'm trying to build a portable EMP generator, which will be powerful enough to knock out (temporarily) my neighbors stereo (if he plays it on loud at midnight again). My setup is as follows: 8 330v 160uF Capacitors wired up in series. 8 330v charging circuits for the capacitors with their outputs in series wired to the capacitors through a switch. The 8 capacitors are wired up to a coil through a switch. The coil is made from 6 gauge wire (or a 1/16" copper strip) that is coiled 5 times. I would really appreciate any feedback because this is a fairly large undertaking for me, and i'm kind of nervous at working with over 2000v of electricity. Does anyone know if you can discharge a cpapcitor by throwing it into a swimming pool???

Topic by recon506   |  last reply

How to make a RFID bracelet for a travel card (Oyster card)?

Im trying to make a bracelet which incorporates my London Oyster Card (RFID travel card) so i can just swipe my wrist and not faff about with wallets or pockets etc but I am having a few issues. The basic design is going to be simple and effective. I will have a length of regular guage wire around the wrist, secured by a single wire connector/ terminal block (see photo). It will prob be a earth wire, as it is a fancy colour. The RFID will be placed inside the plastic connector and hot glued end end to secure it and keep out the elements. The RFID's aeriel wire will be inside the earth wire heatshrink, it will be a loop of wire and can be as thick as it needs to be. I keep having problems though, I cant get the chip out of the card in one piece. I have been using nail varnish remover but with mixed results.   When/if I do get the RFID chip out of the card, i will need to solder a new aerial and I am unsure about the process. Does the length/gauge of wire matter for the function of the RFID? im thinking about its frequency. Will it need to be ceramic covered wire to avoid shorts? Has anyone put a contactless travel card into other things? Or has any experience dealing with this sort of area? I would very much appreciate any help or advice.

Question by Clodester   |  last reply

Would 3 camera flash caps make a strong enough bank for a coil gun?

I've got 2 capacitor banks right now. The first one uses 3 300V, 120uF capacitors, and the second uses 2 16V, 1000uF caps. Is either of these strong enough to make a coil gun that fires 2mm iron pellets at around 200fps? What if I give it a second stage? Also, I've already made 2 coils around plastic tubing, one using 3 layers of 16 gauge wire with 15 turns each, and the other with 5 layers of 20 gauge with 25 turns. Which one would give me the most power?

Question by AndrewJewer1 

need info regarding replacement items in circuit.....

Hi guysI am trying to build a three stage fm transmitter and for the life of me I cannot find a 5-20p trimmer cap anywhere as well as the copper tinned coils...what can I replace the trim cap with.....a cap with a different value? and what can I replace the copper tinned coils with....normal 18 gauge wire coil?..any help will be welcomed

Question by JJK6   |  last reply

Coil gun doesn't work help?

I used about 5 ft of 22-24 gauge insulated(thin) wire(single strand)and coiled it into about 1 inch long coil, the power is about 170VDC , when I test it out nothing happens, My ground is soldered together and I test it by connecting the positive to the other end of the coil, there is a spark but no projectile i try moves at all.

Question by tom10122 

Does any one know how to make an Ne-2 joule thief ??

Recently I’ve been researching on how high voltage joule thief works. The popular high voltage joule thief videos out there are known as Jeanna’s light if I’m not mistaken. I also built my own little LED joule thief circuit, it appear success after all with a 2n3904. But I want to take the concept a little bit further, so I decided to attempt on the high voltage joule thief circuit. It appear no luck, I have 120 turns for high voltage on my ferrite core (1 turn = 1 volt). I know it’s the same principle as the LED joule thief but with the LED removed. I have two 1kohm resistors and I connected them in parallel to get 500ohm resistance. I connected them all like the LED joule thief, but it seems like I did something wrong.  So I ask for further instruction. Parts that I use: 40 or 30 gauge magnet wire (high voltage windings) 20 gauge magnet wire 2n3904 transistor (Don’t know if that’s the right transistor for this circuit, but it’s for experimental purposes only.) 2x 1Kohm resistors in parallel = 500 Ohm resistance AA rechargeable battery. The thick magnet wire are 7 turns.

Question by BlackWolf1024   |  last reply