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24 Threads found on 220 12 Transformer
The speed control circuit using triacs in the fan expects a smooth sinewave, not the abrupt pulses of a modified sinewave. The 10V transformer does not produce enough output voltage for the average voltage to be 220AC. The peak voltage of 220VAC is 311V but the 10V transformer produces a peak voltage of less than 12/10V x (...)
I want to stepdown 300Vac 50hz to 5v(peak)ac but i have only 220v to 12vrms transformer available can someone suggest how can i use this 220v transformer with 300v. I tried using a potential divider to first divide the voltage but it doesn't works since the primary winding of transformer comes in parallel (...)
You must use transformer, reactive capacitance (capacitor like a resistor), smps, etc... ( ) ( ) Caution, Electric Shock Risk!!!
I'm learning how to make an inverter, and need help figuring out what is normal and what is not, and fixing the latter. The basic layout is - make 320V from 12V, using a high frequency, small size ferrite transformer, rectify the 320V, turn them into AC with a full bridge. It splits nicely into two parts, and i want to debug them separately.
Use transformer. But on transformer primar you need lots of current. Core 30mm x 25mm 56W, Sec 220V at 200mA EI type of iron core. Primar 12 turns of thicker wire, secundar 1397 turns 0,31mm.
remember conservation of energy? Well, for an ideal transformer, the power into the primary = power out of the secondary. Since you want 220*5=1100 watts out, you need 1110 watts in, or 1100/12=92 Amps. But since you can't buy an ideal transformer, you're going to need to put more than 92 amps in. You need to know the efficiency of the (...)
The inductances of the primary and secondary should be different if the ratio is different: L1=L2*(N1/N2)^2 . For example, let's say you have a 1H secondary inductance and the ratio is 12/220, then the primary would be approximately: L1 = 1H*(12/220)^2 ~ 3mH Also, the coupling coefficient can be safely chosen as 0.99, but set it to 1 for a better u
Dear Experts I want to design a pic micrcontroller based switch mode(Ferrite Core transformer) Based 12 Volt DC to 220 Volt Ac 50 Hz Inverter. today i have downloaded a circuit from this forum but i dont understand. can any one help me to understand the circuit as well as required Microncontroller Code and also ferrite core transformer (...)
It is not possible to step up voltage from 12 volts to 120/220 volts. I think you missed the output part of the design. Either it is directly connected to 12 volts /220 volts transformer or the voltage from 12 volts is raised quite high (like 400~600 volts) and then controlled to the load with with transistors. See the attached Circuit just (...)
This project is new for me however I designed lot of square wave inverters using transformers(12+12/220) but looking your project using full bridge with MOSFETs and IR2110 pure sine wave in which you have not used transformer,how voltage from 12 volt(single battery) will be raised to 220v there any one to make me (...)
You can find the minimum relationship (number representing n1/n2) this way: n1/n2 > (220√2)/12 = 25,9. Other than that, it's important that transformer core does NOT saturate when feed with 12V@50Hz input. I would have choosen n1/n2 ≈30.
It will work although it is not very efficient. Expect to get less than 220V out and do not use it when the load is frequency sensitive as it will not be stable enough. The circuit is basically a multivibrator driving power transistors. For simply driving a lamp it should be OK though. Brian.
i am confused about max load current if i have transformer input 220 V / output 9 V how can i know how much max output current can supply? and the samething if i have solar cell supply for example 12 V DC and i dont have datasheet for it how can i know experimentally check the max output current can supply and hence the watt of it thanks
i have a step up 12 v to 220 v transformer.I have the question that is 12 volt input rms or peak to peak. I mean should i have to apply 12 v rms or 12 v peak to peak to primary of transformer???
Hello all, I am in need of some help. I am in need of a transformerless power supply will allow me to have a universal ac input 110/220 volts and an output of 12 Volts at 3 amps. I had a couple of old monitors around the house that were auto switching. I traced out the ac portion of one of the
hi i want to design a supply without using a transformer the supply is 220/12 i thought to but a rectifier then a resistor then a zener 9v what i want to know does the supply can supply much current and is it stable "a rectifier then a resistor then a zener " will put you in troble and it is not safe. You may harm
If you can't find 12-6-0-6-12 configuration you can always use 2 smaller transformeres 6-0-6 and connect their primary windings in parallel (220V) and their secondary windings in series .. Here is an example of multi-tap transformer from JAYCAR:
Hello, I need a circuit for 5v/12v DC supply from 110/220 AC. The common way is to use a transformer, a bridge and a voltage regulator. I know this way, but it is needed to be done without using trans becasue of its weight. The maximum current is 500 mA. A friend told me to use HV capacitors instead of Trans to reduce the AC voltage, the other p
transformer - No centre-tapped (shown below). Look for 240/12, 230/12 or 220/12 transformers. If you can find 240/9, 230/9 or 220/9, it would be fine too. If you use a transformer with centre-tapped, you can instead use a full-wave rectifiers (using 2 diodes only), the centre-tapped terminal of the (...)
Here you have an example of 220ac/12Vdc smps: However, if you don't feel confident about HV ferrite transformers then you should consider a step-down transformer 220/24Vac + bridge + smoothing cap, and a switchmode dc/dc converter build around sme 5A IC, such as for example LM2768: www.national