I am trying to turn 3v dc into 300v dc to charge some capacitors I plan to use to make a coil gun. Any way I can do this cheaply and relatively easily would be a huge help!
Topic by J55862 | last reply
Hey guys this is rush... i want to make a high voltage power supply made from a charger and a trans former this is how i'm planing i will connect the output of the charger to the real output (where the plug is connected ) of the transformer and connecting the real input (where it originally lowers the voltage) meaning to say output(ch)--->input(trn) the output of the project is the real input of the transformer guys pls. help me as fast as you can tnx - ~_~
Topic by crazy lazy man | last reply
I'm building a power supply for a cnc router powersupply. The output has to be 36 volts at 12 amps. I'm going to use 6 of the 25.2 volts, 2 amps transformers at radioshack (I have a coupon). When I rectify it it should be about 36 volts. Couple questions about transformers 1) don't transformers essentially short out an AC socket? I don't wwant to start a fire. 2) how can I have a LED indicator that indicates that each transformer is working? I don't want to use a huge resistor, because that seams inefficient. 3) how big of a filter capacitor do I need? I have a 33000uF capacitor, think it's a bit overboard? I know I need at least 4800 uF for just stuff like motors, but the only capacitors I have that works above 50volts is that capacitor. 4) can you connect AC in parralel? Can someone draw be a diagram?
Topic by guyfrom7up | last reply
Hello everybody! I just need some help with an electronic project I was doing-I need to desolder a transformer from a camera flash circuit, but every time I try with a new circuit, it always melts or the component leads fall off. I have included some pictures of it, maybe someone could identify the kind so I could buy it at an electronic retailer? It is meant to have 5 leads, with 3 on one side and 2 on the other. On a technical reference it has 7:3 coil ratio. Any help would be greatly appreciated. Thanks!
Topic by NightRider7 | last reply
2 questions about transformers: - If a certain transformer (let's say, for a power amplifier) is needed, and for example, a microwave transformer is available, can the steel frame be cut to take out the secondary coil, to be replaced by a new one, and subsequently be re-attached (by clamps or so)? Would it need some treatment, like putting varnish, or oil over it? Would this cutting and re- attaching cause a loss in efficiency, or cause heat build-up? Would it cause more noise in the output? - Some amps have a toroid transformer. Is this just fashionable or is it for a reason? Some industrial amps use sheets of copper instead of wire. Why is this better for industrial, why, and if not for common stuff...?
Question by BobS | last reply
Designing a transformer, currently i have a 250mm by 250mm window for wire and interchangeable coils, some only a few turns, but will leakage flux cause large power loss?, or will it just limmit current, i read some stuff and im not really sure, i mean i don't want to start building it if it won't work
Question by pwnag3 | last reply
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
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
Hey guys I need some help from the experts. I am building the microwave transformer ark welder instructable. I have acquired my microwave transformer, and rewound the secondarys. Now here's where it get interesting. I stay in South Africa, and we have 220v, 15amps coming out of the wall. So I figured with so much wall power I probably only need one transformer, cos I already have too many amps (on paper). So from what I understand, I will be putting 3300watts(220v*15Amps) into this transformer. Another interesting detail is that I think my transformer has 200 turns! I put 16 turns on the secondary (although there is space for more, I just don't have a piece of wire long enough). Which means that my out put voltage will be 17.6v, and 187Amps! Ahhhhhh!!!! If I wind a few more turns on the secondary, I could probably squeeze 25 on there, that will bring my output voltage to 27.5v and 120 amps. Which seems like quite a lot? So here's my question: Will this work? If not, and things go bad, what will happen? Is there any chance that the primary coils will melt, or is it only the secondarys that will do that? I don't really want to destroy my transformer, because they are really hard to get here. South Africans won't give you snow in winter. I had to buy a broken microwave! One idea I had: I have a single coil wrapped around a plate iron core, it looks just like a transformer but with only one set of windings. The thing is as big as the microwave transformer, its wire is of a slightly thicker gauge, and it probably has about 600 turns on it (it belonged to a florescent light setup). I thought I could connect this up to the secondary winding, maybe it will bring the amps down, and also serve as an inductor/ark stabilizer. But I'm just guessing, I'm a complete noob to electronics!?
Question by lenny25 | last reply
Am aware of toroidal ferrite txformers used in Joule Thief apps,any other uses for the 'longer' ferrites ?
Question by chadeau | last reply
Would you like to check this project out? http://redcircuits.com/Page124.htm it needs a small transformer with 230v input, 12v output 100 to 150 mA. How much turn main and secondary do i need? it said that i have to reverse connected the transformer. Sorry for asking, i'm not an electrical engineering student Regards Prasetyo
Question by pmuhammad dwi | last reply
Hello, i just started learning how a center tapped transformers/smps works and i did some test but now i am confused about the dual power distribution, i mean if a device input power rating is a centered tapped, say +12_0_-12 VDC, when we measure the +12 and -12 the voltage is 24VDC but we can't use the 24VDC on a single 12v:0v device it short circuits the transformer/smps. When we measure the +12 and the GND the voltage is 12VDC and we can even use the +12v:GND with a single 12VDC device, so my question is, does the center tapped device actually uses the 24VDC or the device splits the 24VDC into 12VDC/12VDC. Thank you. Sorry for my beautiful English, there is nothing to admire nu(:
Question by Lima79 | last reply
For experimental purposes i want to remove the ferrite core from a flyback transformer. I want to be able to remove it without damaging the primary or secondary windings. I don't care if the core is ruined. Someone suggested boiling the transformer in water. Has this been successfully done or is this an untried suggestion?
Question by Blake | last reply
Can the tiny little transformers be of use in simple electronic experiments? Can they be used in place of a toroid in a Joule thief?
Question by brandegor | last reply
Building the microwave transformer welder. Is there a distance that they need to be from one another? One site said they need to be 5" from each other. Some youtube vid said they can't be aligned in the same direction and has to be 90 degrees turned.
Topic by eric m
In transformer formula , the primary turns and secondary turns affect the voltage and current directly. Why some transformer output voltage is affect by frequency and core type , just like Flyback Transformer(LOPT) and Tesla Coil specifically is Solid State Tesla Coil?
Question by james34602 | last reply
Hi can a transformer connected in reverse. if 230v to 12v transformer is connected in reverse,. will it generate around 230v Just some silly doubt. Actually i was trying to find a step up transformer.. which converts 6v to 24v. what exactly its called.
Topic by nominds | last reply
Hi everyone,I just want to know if there's anything that could replace a step-down transformer i.e,Step down 220 volts(AC) to 5 volts(DC).I want a thumb nail sized transformer for my purpose but its hard to get,so if there;s something more compact and can replace the transformer,things would move on awesome!
Question by Adarsh_tronix | last reply
I recently got a working microwave transformer for free, it has unknown wattage, though. What's the best way to ballast it? Some people use lightbulbs, I'd rather not use lightbulbs cause that's almost as dangerous as the lightbulb it's self (I'm comfortable with the transformer, I'm not comfortable with a 500 watt lightbulb, ironic?) No saftey speeches, please, lol.
Topic by guyfrom7up | last reply
I have an urge to play with high voltage. Maybe a Jacobs' Ladder, maybe a plasma speaker, maybe just make sparks and burn myself. Does the make / model of flyback transformer matter? Or do they all connect the same way? For instance, would you recommend this model?
Question by Kiteman | last reply
i want to combine two of 10 ampere Trafo, so i can have 20 Ampere power supply i read a few article that say if we connect the sekunder(secondary) of identical Transformer in pararel, we can have a double time current flow on this connection. do anybody have try this before?
Question by beatobe | last reply
Hey I just moved my JVC JX-S700 into my new media center, and now it wont power up. Opened it up, and the transformer doesn't seem to be putting off any voltage on the output. I have approximately 1 ohm between the 3 outputs. So I thought that was likely to be the issue, is there anything I should do to make sure that's the problem spot? Is there another fix for this besides replacing the transformer? And if I have to replace the transformer, can anyone help me identify it? Thanks Crew!
Question by Cold Shoulder Media | last reply
Ok, i have this transformer that i pulled out of a mac computer a couple years ago, i dont have it with me nut i think its a flyback. If it is, could i just hook it up to a battery and capacitor to make a charger or do i have to build some sort of modulator or switcher? Almost anything helps, thanks.
Question by budhaztm | last reply
I am going to be hand-wiring up a large lot of transformers. Someone has told me there is an enameled wire (magnet wire) whose coating melts when you dip it in solder (also tinning the copper tip at the same time). What is this type of wire called? I am having a hard time searching for it. Thanks!
Topic by samurai1200 | last reply
Hey I have a litte problem! (sorta, not yet!) So, I have one of those wall adapter things, and it says it outputs 12vDC and 1 amp. Out of curiosity, i hooked up my volt meter to it and the output was a whoppin 20 volts! Why was it 20 instead of 12 like the transformer said? This is making me worry about my other ones!
Topic by HavocRC | last reply
Hello, my question is simple. If I connect about 3v to a microwave transformer and then to a coil, would it make a efficient EMP wave (shutoff a calculator). I know that I can use a disposable camera, I just am learning different ways to do it. (Sorry for the pic, done with my phone haha)
Topic by Skydazz | last reply
I got this out of a wall-wart and am trying to add it to my stun baton to make a bigger arc, can anyone tell me the full info on how to use it as an arc generator using a 2000 volt input? PS im doing this safely and DO NOT USE THIS ON LIVING THINGS JUST AN EXPERIMENT!!!!
Question by Myers Technology | last reply
I eveyone I am new to the whole electronic scene, i have a bit of kwowlage, but not as much as i need. I need a bit of help pls I am trying to build my own 12v to 230v dc to ac inverter to connect my flat to it. I need about a 5KVA inverter Can anyone pls give me some details on winding the transformer for it. I need to know how many windings on each coil and the size of wire i need for the windings, and any other details that u can spair for my project. Thank you in advace for your help.
Question by rahvin1223 | last reply
Hi so I was bored and decided to make an electromagnet out of a microwave transformer by taking the secondary off and keeping the primary. I hooked it up to some 9v batteries and stuff but it wasn't that strong so I researched it a bit and found out you can hook it up to the transformer input voltage (which was 240v AC) so I did but when I turned it on it made this very loud buzzing noise and I thought I saw what looked like flame in the socket. I turned it off imediately and unplugged everything. Whatever the magnet did must of been strong because it broke itself apart slightly. I tested the sockets with a multimeter and they still say 240v but I just want to make sure I didn't do anything bad to it. Also did anything actually go wrong or was this all meant to happen?
Question by jlandreth1 | last reply
I have recently dismantled an old CRT monitor i have had lying around for ages to get the flyback transformer. I have been trying to get the correct pins to using methods found on the internet none of which have seemed to work i have found what should be the primary coil and have applied the current and placed the high voltage output in front of each pin to try and find the high voltage ground, this has not worked so i have applied the current to all of the pins in every combination and still i am unable to get it to work. Please help me.
Question by Hav0c | last reply
I am aware mostly how transformers (AC - AC) work, but I am lest informed on a few key parts. I know there is a direct relationship between windings and voltage as well as an inverse relationship between voltage and amperage. The thing I don't understand is what limits the current produced by the transformer. I know you can keep droping the secondary windings to increase amperage, but eventually you get to a point you can no longer do that. To overcome this one can use three sets of windings wired in parallel which will retain voltage but increase amperage. The amount of amperage is still limited to the maximum throughput of the primary, but how do you actually find this out. If one wanted to make a variable current AC welder, it would be relatively easy to predict the voltage, but establishing a potential amperage is more difficult. What actually establishes the maximum output of a transformer because in some cases the max current is reached long before the actual failure, and is there a way to predict the end product. P.S. I am not looking for the answer they use voltage/current limiting circuts ect... I am looking at something like a pole pig which maxes out output before internal failure and contains no additional circutry, not a wall wart
Question by jj.inc | last reply