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Make your own DIY 50 watt 12 VDC to 220 VAC Power Inverter UPS

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Easy Homemade 50 watt Power Inverters (12 VDC to 220 VAC) UPS

Make your own DIY 50 watt  12 VDC to 220 VAC Power Inverter UPS

Power inverter (UPS Uninterruptible power supply) is a very useful device which can convert Low voltage from a DC source to high voltage AC. The most common power inverter is 12V to 240V inverter. Perhaps that is because 12V batteries are common. This type of power inverter usually draws current from a DC battery. This battery should be able to provide a high flow of electric current. Normally lead acid batteries can server this purpose well. This current is then converted to 240V square wave alternative current so that we may empower those electric appliances which work on 240V instead of 12V. Inverter falls in the category of expensive devices so many people don’t buy them even they need them. What if I tell you how to build an inverter (UPS Uninterruptible power supply) yourself?

There are a lot of inverter circuit diagrams available online; some of them are complex and others are low performance. I designed my own inverter circuit which is comparable to any professionally made inverter but still is simple enough for you to try.

500 Watt 12DC to 220 VAC Power Inverter (UPS) Construction in Urdu 

500 Watt 12 VDC to 220 VAC Power Inverter (UPS) uninterruptible power supply (English)

Make Your Own 50 to 500 watt Inverter UPS

Watch Video with complete instruction .

Alternate video: Watch Video with complete instruction .

make your own power inverter ups (Urdu) by paksc

Here is the inverter circuit diagram:

Inverter Circuit Diagram

Download Inverter Circuit Diagram

You will need the following parts.

  • 2, metter copper wire (for winding)
  • 2 Transistors 1047
  • 2 Heat sinks to fit power transistors
  • Some wiring wire (for connections)
  • A wiro-board (To build circuit on)
  • A 12V battery of 12V power supply for testing purposes
  • 1 Resisters 1 k


First of all you have to make some changes in transformer. If u are using 500 V transformer then take 18 to 22 gauge copper wire and on the one side of transformer’s core  make five turn and put a point on it, and turn this point, and again turn the wire five times on the same direction. In this way u get three terminals. If u r connect the transformer to 220 V power supply then it gives 1.5 V on both terminals. Now put transformer D1047 on the palm of your hand and turn it such a way that number appears your way. Now you will see three points. The point on your left side is known as (B) Base, middle one is E and the right one is collector(C). (These are the information only for D1047)

connect the E of both sides of transistors with the outer terminal of secondary coil, after that connect the both outer terminals of the third coil with the base of the both heat sinks of transistor. then connect the collectors of both side by wires n then connect the 500 ohm resistor on emitter and resistor on either side. Now connect the middle terminal of primary coil by one to two ft long wire and clip (crocodile) it and attach this terminal always by the positive terminal, and with the negative terminal of battery connect the both collectors of transistor.

After that the central point of the third coil and a wire attach it with emitter to connect using a heavy ampere switch between both terminals of the Inverter primary coil to apply a capacitor which will prevent the current from the sparking. inverter will switch on as soon as starting to work.


With both the terminals of battery connect the positive and negative wires to its terminals positive to positive and negative to negative and then open the switch, slightly vibration starts in the inverter as switch is open. Now you can run it into 1 to 500 watt load.

 500 Watt 12DC to 220 VAC Power Inverter (UPS) Construction in Urdu New

This inverter also can charge the batteries, you just need to( on and  off) the switch.


You will need to switch off for battery charging and connect the primary coil indirectly with 220 V of power supply, after that battery will start charging. To converts it into UPS you needs only one relay. These relays are AC 220 V and 4.4 terminals.

For online help  visit Pak Science and technology Forum

Here is the inverter circuit diagram for battery charging :

Download Inverter Circuit Diagram

Here is the inverter circuit diagram for Inverter operation :

Power Inverter Wattage Chart

inverters Transformer voltages (Input)
Transformer Amps Transformer watt No of Transistors D1047
50 watt inverter 12 V 4 A 50 W 2
100 watt inverter 12 V 10 A 100 W 4 to 6
300 watt inverter 12 V 25 A 300 W
6 to 8
500 watt inverter 12 V 40 A 500 W 8 to 10
1000 watt inverter 24 V 45 A 1000 W 20 to 26
3000 watt inverter 24 V 125 A 3000 W 40 to 50
5000 watt inverter 48 V 105 A 5000 W 60 to 70
Note. table shows that requirement of D1047 transistors for different power inverter wattage

Discussions about Pakistan Science Club's Power Inverters 12 VDC to 220 VAC UPS, you can find problems, troubleshooting and construction help Please visit Power Inverters (UPS)12 VDC to 220" Online Support

power inverter ups

power inverter Urdu New

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  • Comment Link PAKSC Tuesday, 01 November 2011 08:30 posted by PAKSC

    @Zaiban Ali
    You can contact at info(at)paksc.org.

  • Comment Link Monday, 31 October 2011 16:03 posted by Zaiban Ali

    Assalam Alekum sir i am glad to say that this project is awesome ,,, but i am facing some difficulties related to this project ...,
    1. The transformer i have purchased is not open , mean its windings are not seeable so what i do.
    2. Can i use more then two transistor with type of transformer to run high voltage appliances.

    Sir please answer , on current page or mail me , will be very thankful to you....

  • Comment Link Sunday, 30 October 2011 14:10 posted by moses

    pls kindly make a english video version so dat other people can benefit

  • Comment Link Friday, 28 October 2011 14:05 posted by Nisar Ahmed

    Its so simple hy sir

    basically my Tv technician hu.Aap jaisa ckt my kidher bhi nahi dekha.Etna asaan ckt......
    But ek dout sir a ckt(circuit) Batery ko ower charge karne se
    safe rekhta kya

    Aur aap ke video etna crystal clear voice and demonstrating ke saath rehte hy.Thanks alot 4 uploading

  • Comment Link Tuesday, 25 October 2011 06:09 posted by aileleule

    sir.great job.gog blease u

  • Comment Link Sunday, 23 October 2011 03:54 posted by khalid khan

    very good. hum Pakistan ko powerpull dakna chakhty hain.
    khamary taraf say message hy. kih app log koie bi tajroba karty ho. to os ko zaror Urdu language main batana hain. kuin kih zyada log English nahi samaj sakty. 1 or bat, 1 mufassal note be likna chahiy. thanks for http://www.paksc.org
    pakistan zinda abad

  • Comment Link Sunday, 09 October 2011 13:11 posted by Faizan Ellahi

    Sir, i want a circuit diagram of up-to 1000W UPS square wave to sine wave inverter.Please help me how this circuit can build.I shell be very thankful to you.

  • Comment Link Friday, 07 October 2011 05:33 posted by Sajid

    Abdul Rauf bhai me sajid...mera invertor bn to gia he lakin transformer lagany pr output ni de ra pir aap se poch ne pr aap ne bataya ta k apni wiring jo ki he us k side k point jo transister me lagy hn wo chnge kr k dkh lo to kre te or aap ne ye b bola ta k resister to shot kr k b dkh lena phir a jai ga........resister to bar bar shot krne pr output a ra he musalsal ni a ra....wese 7.2 amp ki batry pr musalsal r ra he jo aap ne apne invertr ki video me use ki he or me car ki batry laga ra hn to us se b ni output ni a ra please aap dobara kuch guide karn k trnsformr pr or bar bar shot resister shot na krna pare.....jo me trnsfrmer inverter ko voltage dene k liay laga ra hn us k 12v or 4 amp hn.....

  • Comment Link Saturday, 17 September 2011 11:23 posted by tahir ullah

    how to build 5000w inverter

  • Comment Link Tuesday, 13 September 2011 21:17 posted by zain

    aoa i m confused regarding circuit diagram of power inverter ......i think in this case transformer primary side will b of 12v n secondary will b 220v plz clear m confusion

  • Comment Link PAKSC Sunday, 11 September 2011 16:29 posted by PAKSC

    @ fahad you should search transformer shop in cooperative market and asked about 12 by 12 volt 220 v 5 amp transformer

  • Comment Link Saturday, 10 September 2011 09:33 posted by Fahad

    @aneesulislam, aap nai transformer kahan se lia...aap dukaan ka pata bata saktay hain?fah

  • Comment Link Thursday, 08 September 2011 09:34 posted by ANEESULISLAM

    Main nay jo yey vedio dekhi to main nay 1 ghantay main hi yey inverter banaya hai yey to buhat hi asan aur buhat hi karamand hai.main kuch aur is inverter ko powerfull banana chahat ho so is main meri kuch madad karday to i thankfull to you.................. my email is : m_anees71@yahoo.com 03123715871

  • Comment Link Saturday, 03 September 2011 11:12 posted by Fahad

    Sir aap dukaan ka pata bata dain...mainai co-operative market main bauhta dhoonda tha...likin mujhay transformer nahi mila...

  • Comment Link Monday, 29 August 2011 05:53 posted by Awais shoukat

    Sir transformer mai sy secondry central coil kahan sy aai.....
    Sir plz apna number send kerdain.......

  • Comment Link Sunday, 28 August 2011 08:39 posted by Awaispilot

    Bhai jan mojhy transformer ki problem arhi hy.
    Sir apna contact number plz email kerdain.plz plz main electronic mai bohut bohut interest rukhta hoon....

  • Comment Link ABDUL Saturday, 20 August 2011 17:38 posted by ABDUL


  • Comment Link ABDUL Saturday, 20 August 2011 17:32 posted by ABDUL


  • Comment Link Saturday, 20 August 2011 03:32 posted by zeeshan ahmed

    sir may nay b kuch projects bnaye hay may paksc kasay join kro. may karachi may rahta hn

  • Comment Link Friday, 19 August 2011 10:56 posted by Fahad

    Sir mairi yeh samajh nahi aya k e-tech main jo tahir atay hain...woh kisi program main bata rahay thay k 30w ka inverting transformer 20 sai 25 rupai ka mil jata hai...aap nai bhi yaqeenan woh video daikhi ho gee...to un ko itna sasta transformer kahan sai mila hoga?


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