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Can someone please try to explain how I can re wire a microwave transformer (or any other Transformer) to be used in a custom inverter. The input is 12 volts and the output needs to be 120 volts. Pictures would be great, thanks in advance.

Question by arenavles    |  last reply


I am making an inverter whivh converts 12 V dc to 230 V ac i am using 2 33 ohm resistor of 1 watt to connect the load on transformer whenever i switch on the ckt the 1 watt resistor are heating to much and multimeter does not show any voltage i am using 12 Volt dc 2.5AH battery as power supply what is the problem

Topic by AbhishekR2    |  last reply

inverter circuit

I have several BD139 transistors, several types of transformers, blocker diodes and 40pf 50v capacitors. can anyone show me a simple schematic to convert low voltage to high voltage?

Topic by buddybro    |  last reply

Inverter question? Answered

I have recently made a pond in my garden and to avoid spending lots of money in electricity, I decided that I would power it with a solar panel. My pump is 220v 34w, so I thought that a 40 or 50w solar panel should work. However, i can't find any 40-50w inverter, only about 150w. So, my question is, will a 150w inverter draw 150w from the solar panel if powering only the 34w pump? In other words, will a 40-50w solar panel be able to power a 34w pump via a 150w inverter or would I need a 150W solar panel for that?

Question by tgferreira184    |  last reply

inverter rating

Somewhat confused... I'm planning some guerilla projections with a 4500lumen projector (which has a power rating of 450w) can I run it with a 700w inverter? Instructable on these pages says I need 2000w+ inverter can anyone explain why I need so much headroom.

Topic by helterskelter    |  last reply

invert polarity? Answered

Hey guys, please could you help me?  i trying to do external battery pack to run pedalboard with 4 effects. As far as i know Boss pedals have center negative type of connection. Can pls somebody explain what does it mean? Whether it means that leads are inverted positive goes to the sleeve and negative to the tip? Or tip has to receive negative voltage of minus9V? thanks !!!!

Question by IgorA26    |  last reply

The Inverted Map

This map reimagines the Earth with the idea that the oceans are the land masses and the continents are the oceans. It's interesting to see a world map where everything is connected and it would be possible to walk the entire circumference. It reminds us that what is "normal" comes from our own personal experiences.Whether the map is a Mercator map, a Peters map, or a map of something besides the Earth, that map can have a huge effect on how you perceive it. Just like statistics, maps can be deceiving so make sure you're questioning the sources and get the best information you can. link

Topic by fungus amungus    |  last reply

how to build an inverter

I want to know how to build an inverter upto 5kva

Topic by segge    |  last reply

inverter on a camera flash

Ive been studying the intertubes for a bit now and I cant seem to find an explanation on how a disposable camera flash works in detail. I mean I understand that it runs with two transformers, one at 300v output to charge the cap and the other to help discharge the payload through the xenon bulb run at 2000v output. but a transformer doesn't work with out a pulse or rapid continuous change in voltage. so how is it inverting to ac or am I missing something stupid

Topic by snowfox222    |  last reply

Square wave inverter?

I am building an inverter that will use a square wave pulse to drive MOSFET's at 50-60Hz. I have read and heard a lot of stuff that running square wave into a transformer is not a good idea, what I want to know how bad is it? Also will adding capacitors as seen in my image be able to smooth the square wave a bit to help the problem? If so what capacitance should I use? (About 200A input) (The 12V square wave is coming from paralleled MOSFET's)

Question by The MadScientist    |  last reply

power inverter: help? Answered

I have this power inrter, and i once hooked it up t a mac power supply converted to a benchtop power supply. i didn't know i yet, but the power supply was surging, and it started making he inverter smoke. i turned it off, but the inerter never worked again. can i reuse any of these parts to make a new one? i dont think it was the actual inverter piece, but one of the others p.s. this inverter was from a hp scanjet scanner

Question by zack247    |  last reply

Broken Power Inverter Answered

I have a sima 140 Watt power inverter, and it doesn't work anymore! I don't know why... I don't have much experience with inverters. Can someone help?

Question by martzsam    |  last reply

Transistor Voltage Inverter

I am a newbie and was hoping someone could assist me. Given the following schematic which takes a voltage of 12v and considers it off and a voltage of 2 volts and considers it on can someone tell me what changes would need to take place regarding capacitors and resistors (if any) to account for 20v instead of 12v? Meaning that when 20v is considered off and 2v is considered on.

Topic by TimothyE2    |  last reply

Inverter to Flaslight bulb?

I am building a basic night light ordeal, and I used a photoresistor to detect the change in light. Of course, the photoresistor will, by default, only have a high output when there is light, so I used an inverter (Not Gate). My inverter is made up of a transistor , a 1.5k resistor, a 10k resistor, and leads off to a LED. The photoresistor would go off to the Base of the transistor, so it can invert the output. Originally, I had this hooked up to a 4.5 volt input (the photoresistor has 4.5 volts going to it, and the transistor had 4.5 volts going into it), but I wanted to brighten it up, so I upped the voltage to 7.5 volts so I could add a 6.3V Incandescent Flashlight Bulb ( When I hook this up to a regular 6 volt battery pack, I easily turn the light on. When I connect it to the inverter, however, I don't get anything going on. I've upped the input voltages to 9 Volts, but still, no dice. Everything works fine until I change the LEDs to the bulb. So far, I've changed the resistor values in both directions (I've decreased them down to 10 Ohms, and increased them to a max of 1M Ohms). The only way I can possibly get this to work is by removing the Resistor going to the Collector, but then it is constantly on. The output of the photoresistor no longer matters. The output of the inverter is constantly high. Any ideas? All help is appreciated.

Topic by freethetech    |  last reply

DC supply for inverter

Hello. I need to figure out the component values for a "simple" high current power supply... and whether the component costs would even be feasible. I plan on buying a 3Kw output 12 DC inverter for use in Spain. I have several US devices that I don't want to run off a step-down transformer as running them at 50Hz instead of 60Hz will cause heating and eventual failure (I experimented with my Technics power amp, it got very hot and started to smell, then the output went way down... it's now on the "one of these days I'll open this up and take a look" pile). So, what I need to design is a 220 to 12 volt/300 amp unregulated supply. Ideas, anyone?

Topic by tsmyles    |  last reply

Scanner inverter outputs

I've just been wondering about the output of scanner inverters for a few projects, what kind of voltages and amperages are they outputting. I have a few little ideas but don't really know that much about their outputs, I gave googling and parts numbers a go but mostly found unrelated pages or had no luck with part numbers...

Topic by killerjackalope    |  last reply

3000 watts inverter

Anyone knows how to build or make an inverter? a 3000watts inverter? can u give me the list of parts and picture diagram or schematic diagram? thanks guys

Question by dangzching    |  last reply

Inverted Drill Press?

Hi..for those of you who may own a drill you think it would  be possible(On the smaller lighter versions maybe)  to invert it and use the press upside down to drill though 8" thick wood and land spot on ?..Cheers

Question by thedude0078    |  last reply

Inverted color crosshair?

Hello robots. Is there any to get a small dot center of your screen that inverts all color behind it? Kind of like the Minecraft crosshair, except it is always shown in the foreground on top off all programs. My little bro plays like this on his t.v. but with small piece of tape in the exact center. It would be really useful while playing FPS games. I know I'm making things complicated, but I'd rather not have adhesive residue on my monitor.

Question by unominame    |  last reply

Transistor Voltage Inverter?

I am a newbie and was hoping someone could assist me. Given the following schematic which takes a voltage of 12v and considers it off and a voltage of 2 volts and considers it on can someone tell me what changes would need to take place regarding capacitors and resistors (if any) to account for 20v instead of 12v? Meaning that when 20v is considered off and 2v is considered on.

Question by TimothyE2    |  last reply

5000 watts power inverter

5000 watts power inverter with the circuit diagram using SG3524

Question by santos4eva    |  last reply

El Wire AC inverter

El wire is cool and all but all the circuits that come with them are so half assed made it isn't funny. I have yet to get a circuit that is up to spec's that even closely adheres to any of the soldering tips and ticks, good soldering joints, anything. crap crap.  i have the components but the board is whack. how do you go about making a AC inverter for Elwire?

Topic by Chingasman    |  last reply

ccfl inverter, samsung sic320?

Hello, my laptop recently died, i killed it, anyway, i have salved some stuff, one of which is the cold cathode and inverter assembly, except, i cant get it to light up, i tried everything, i hope i didnt kill it.  It is a samsung sic320 inverter board, if you hold it where the wires are facing up, from left to right in wire color is, orange, red, brown, and black, i dont have a camera, i killed it to expirementing, but just wanted to know which wires lit the cathode and at what voltage.

Question by cburgess7x    |  last reply

3 Phase inverter explanation?

I am trying to make sense of how to create a simple 3 phase inverter, but the design I have found requires the use of a PIC micro controller for pulsed width modulation to control the 3 half inverters in the image below. I do not have experience with this specific type of micro controller and am unable to find a simple explanation of how to set it up to do this, except how to connect it to the basic circuit at the transistor bases. Would anyone be able to explain to me how to wire/program/control frequency with the pic micro controller or an alternative method that would yield 3 phase power (0-120-240) because the manual and this page have be very very hard to understand to a beginner. I do not need any sort of feedback from the motor because the load will be constant and relatively small, and will most likely run it either at a constant or if easily doable linearly increasing frequency. Can someone PLEASE give me a good simple set of instructions on how to either replace this micro controller with something simpler or wire/program it to do this? Thanks!

Question by amelius    |  last reply

Inverting 115VDC to 115VAC. 75watts?

What would be the best low cost method for me to invert 115vdc to 115vac for a low 75watts bench experiment?

Question by rpshomeservices    |  last reply

How to test an Inverter battery?

Battery testing method in a layman's language

Question by manolr    |  last reply

DC --> AC Inverter Question

I just bought a 12vDC to 115AC power inverter. But it will shutoff when the voltage drops below 10v :/ Can I disable this? It's annoying as I'm running it outside of a car so I cant just start an engine to charge the thing.

Topic by acer5050    |  last reply

controller for Inverter AC unit ?

Hi. I got problem and I cant find the solution. got outside unit inverter aircondition, but indoor unit is missing (resason why I get unit for discount price ) and now I cant run outside unit, because inverter AC you cant control without that PCB from indoorunit but I cant find new-used I search like crazy  days and no result :( is any chance to run that unit without original PCB ? maybe with arduino etc ?  and if anyone know for good store for AC parts (no matter which continent), I need for AIRWELL GC plus 9 thank you for all informations

Topic by primoz1  

How to invert 3vdc to 3vac?

I have some 3vac motors for christmas lights that i want to use to turn small mirrored disco balls. I need to invert 3vdc to 3vac for this operation.  I will be using AA batteries and I can series/paralell the batteries to have enough current to operate. Is there an IC that I could use to do this? I want to do many for a wedding and each set will be located on a table. Superbright LED's  will supply the light source for the mirrored balls. Thanks Bob

Question by BiggBob2    |  last reply

Power Inverter or DSO Problem?

Recently bought 2000w power board to play around.  Sets DSO at 5mS/Div. The output frequency change intervally between 40Hz and 50Hz. Sets DSO at 10mS/Div. The output frequency stable at 50Hz. Please advice which once is the problem? Update June 1, 2017 1. you have a load on the power supply ? With or without load, same results. 2. Try changing the scopes trigger level.. Getting same resulted too when changes the trigger level.  3. Measures with multimeter. Get 49.98Hz and this is normal. 

Question by GearUp    |  last reply

Building a switch to invert current

I got a small electrical engine the other day, and I have to hook it up to two switches so that one switch starts the engine clockwise and the other counter-clockwise. My initial thought was to simply hook it up to two separate batteries each with a switch and one with the current reverted (like illustrated). But I'm wondering if there's a better way to go about this. For instance I have no idea if accidently activating both switches simultaneously will blow up the engine :s

Topic by Flark    |  last reply

DC to AC Inverting for boat

This spring I am looking to build a pontoon boat from scratch (Besides the pontoon logs). Its going to be a large boat and I am wanting a few amenities to go along with it. Im trying to figure away convert the car battery wich is on the boat to power appliances such as mini-fridge, lights, radio, box fan, and maybe a PS2 with Television. I need a high wattage out-put to power everything too. For sure: 8 lights - 75 Watts ea. 20 inch tall Mini-fridge - 200 watts Stereo - 150 watts Box Fan - 120 Watts Maybes: PS2 - 180 watts 20" Television - 300 watts I want this to work if all the for sures were going at once. I want to know how many car batteries I will need approx for 10 hours (or longer) of use with the "For Sures" And I want a clean way of doing this. Any advice would be much appreciated!

Topic by d_child    |  last reply

How to biuld a sine wave inverter?

I need to build a sine wave inverter but i do not have the schematics.I need an assistance in this project.I can build a square wave inverter but it makes noise in the fan and does not surport my 29 inch television causing it to have frequent low current  problems.I heard that sine wave inverter is more efficient for home appliances.Please can some one help me with a simple diagram to build my own efficient sine wave inverter.Thank you all.

Question    |  last reply

Is it possible to run a power inverter in reverse? Answered

I'm curious as to whether supplying power to the ac out side would result in the dc in side putting out power or the board burning out.

Question by acetyleneblues    |  last reply

need circuit diagram for a sin wave inverter?

Good day honorable members pls can anyone help me i want to build an inverter and i need a circuit diagram for an 50Hz 24v to 220v sinwave inverter. Pls can anyone suply me with an circuit diagram for an 2KVA and a 5KVA inverter pls pls help me thank you in advance

Question by rahvin1223    |  last reply

How do I make a 240volt inverter from a microwave transformer

Good enough for power tools I saw one on the net somewhere and can't find it. I got a microwave from the tip but it was too good and so it has a new life in the kitchen.

Question by tezzz    |  last reply

hi, i am in ghana and interested in building this remarkable inverter. Answered

I have been following the question and answer section and had most of the points. my questions are 1. what is the use of T1 and 2. how do u program the IC

Question by aakareng    |  last reply

can i test a 90w inverter with a 1amp psu and my load is a 13w light 110v? Answered

I have tested an inverter with a cable modem psu but not lighting the light, is it due to PSUs 1amp rating or simply Inverter is faulty, I don't own a car or Battery for that matter yet.. 90w inverter 13w light 1 amp power supply.. thanks

Question by celalboz    |  last reply

i have a blackand decker electromate 400 i took it apart for the inverter but the rockerstwich is broken

How to i jumber it to on so i can see if the inverter works

Question by jlc30    |  last reply

what will happen if i give dc 12v and 5 ampere to 2000watt inverter , how much ac ampere should it produce ?? Answered

I now what inverter does it convert dc to ac , i also know that it can convert dc 12 volt to ac 120 -110 volt but  the thing from which i m confused with is that what will happen to the ampere for example i have a 12 volt 5 ampere battery if i plugged the battery to 2000 watt inverter should it produce 2000 ac watt with just 12 volt and 5 ampere battery or i have to give more dc ampere to the inverter................ means can inverter    convert dc less volt to ac high volt  and  with also convert dc less ampere to ac high ampere   or will it convert  dc low volt to ac high volt without changing the dc low ampere and need more dc ampere or will it convert dc low volt to ac high volt with decreasing the dc ampere....

Question by MuhammadK19    |  last reply

How to make a 6vdc to 200vdc converter?

Hello, i am a bit confuse about how to convert 6v dc to 200 v dc having a least power output of 25watts. is it possible?

Question by ubdussamad    |  last reply

connect power inverter to car battery?

How do i properly connect a car battery to my 2000w power inverter

Question by chainsaw0068    |  last reply

A question about power inverter chips?

I need an inverter to use the 12DC of a battery to get an AC varying from 1 to 12V, and also the frequency has to be varying from 10 to 80KHz. the inverter will need to deliver 2W max.  I want to know if inverters do even exist in of IC chips, or will it be a board that i can buy, or am i obliged to make it myself? does a 2W inverter even exist or do people use oscillators for these kind of powers? 

Question by ZakariaF    |  last reply

UPS battery backup as car inverter?

I hope this isn't a dumb question, but if I were to take an old UPS unit, remove the battery, wire a 12V lighter socket plug to the battery cables in the UPS, and plug it in to the car, would it convert the 12V DC to 120V AC while the car is running? And if it worked would it draw too much power or damage anything? I wouldn't use this to run anything with a motor, just a laptop charger and maybe a light. Thanks! :)

Topic by 500FPS    |  last reply

How does an inverter look like? Answered

I happen to have a broken CFL lamp. I took it apart because i wanted to harvest the components that the electronic ballast contains.So how does a DC to AC CFL inverter look like? And how can i use the transformer and the inverter in order to make an electric shocker(battery powered)? Note that i also possess 2 other transformers from Kodak disposable cameras(one of them has 4 pins as the CFL's transformer and the other 5 pins) Thanks in advance.

Question by deathnoteviewer    |  last reply

Noob Q about inverter for an ornithopter

I was looking in the back of my Jameco catalog the other day and they listed a product called "Muscle wire". It's apparently a nickel-titanium alloy that shrinks as it heats up. It occurred to me that I could flap ornithopter wings with it (a really small ornithopter). I was trying to figure out how I could switch voltage from one pair of wires (the flap UP wires) to the other pair of wires (the flap DOWN wires) without a microchip. I came up with something I'm sure wouldn't work involving a couple transistors, a diode and a cap. Today on wikipedia I figured out that what I was doing was something close to an inverter.So here's the question: Anyone know of a simple switching circuit that runs on a/c power and does not have square-wave switching characteristics?I'll keep researching this myself, but sometimes 'tis quicker to ask the big-brained and kind hearted (you know who you are).

Topic by royalestel    |  last reply