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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 Friday, 19 April 2013 15:50 posted by ABDUL

    @ Tariq Mahmood Khan this inverter can also charge battery.

  • Comment Link Friday, 19 April 2013 15:49 posted by ABDUL

    @ nishantha premasiri its frequency around 45 to 55 Hz

  • Comment Link Friday, 19 April 2013 13:23 posted by Mushtaq Ahmad

    Dear Sir, Please look at Power Inverter Wattage Chart last equatio, there is Transformer Amp mention 105Amp. I have confussed about that.
    Over project is very informal and good.

  • Comment Link Friday, 19 April 2013 12:02 posted by muhammad luqman azam mughal

    we want to make desi ups at our shop and guied us in urdu

  • Comment Link Monday, 28 January 2013 04:46 posted by Tariq Mahmood Khan

    Dear, Can you help me to make 12 volt battery charger 4 amp
    Please reply

  • Comment Link Tuesday, 08 January 2013 08:37 posted by nishantha premasiri

    what is the freqency .I wont 50Hz.very good ckt.

  • Comment Link Tuesday, 08 January 2013 08:32 posted by nishantha premasiri

    what is the freqency .I wont 50Hz.

  • Comment Link Friday, 28 December 2012 17:35 posted by ABDUL

    you can make your own inverter transformer visit http://www.paksc.org/pk/psc-videos/video/337.html

  • Comment Link Thursday, 27 December 2012 10:59 posted by ABDUL


    about battery charging video will upload soon..

  • Comment Link Thursday, 27 December 2012 10:57 posted by ABDUL

    @Sumair khan

    if you can't get o.7 volt its not problem
    if you got less than .5 it will work.

  • Comment Link Tuesday, 25 December 2012 12:21 posted by shafiq

    sir as you have explained for charging battery i need to open the transformer 3rd coil connection and E unfortunately i am not aware of exactly which connection as the 3rd coil has three connections . however, as far as i have understood the connection of the 3rd coil i do, opens the battery negative terminal therefor kindly would you please send me the crk diagram
    thank you

  • Comment Link Tuesday, 25 December 2012 08:57 posted by Aliishah

    sir i don't understand how it will charge the battery i mean if i give 220 vots at its primary coil of transformer :( please explain it... thank you

  • Comment Link Tuesday, 25 December 2012 07:10 posted by mohammad sadiq

    very nice,
    we need basic videos.

  • Comment Link Monday, 24 December 2012 21:49 posted by Salim

    As Salaam ilium can you give me a circuit to make 2000watt inverter with full details zazakallah

  • Comment Link Friday, 21 December 2012 11:51 posted by sk a quadri

    how to make one compiyoutar invetar

  • Comment Link Thursday, 20 December 2012 08:16 posted by Sumair khan

    Assalam o Alaikum.... sir transformer main jo changing krni hay is say mujhay 0.7 volts nhi mil rhay ... kia is transformer jaga koi or transformer use nhi ho skta im mean koi already bna hua transformer????? plz help me.

  • Comment Link Monday, 17 December 2012 06:14 posted by ABDUL

    @Ali Awan
    App ko 5 ,5 turn extra dainy hun gy is tarha aap k pas mazeed 3 terminals aa jaein gy side k dounu terminals base ki se connect hun gy aur central terminal battery k -tv se ho ga

  • Comment Link Saturday, 15 December 2012 13:00 posted by Ali Awan

    dear sir/mam
    mujhe yeh inverter bohat he acha laga. main shop se sub cheezein laya magar jo transformer ha us ki secondary coil ma 3 terminal hain primary ma already 2 he hotay ma yeh pochna chahta hun agr 5 turn den to 3 terminal a jeyn gey... mean secondary coil mein 6 terminal a jayen 3 already thay...yah phir 3 or nikalnay han?

  • Comment Link Wednesday, 14 November 2012 10:07 posted by gurwinder singh

    hello sir Have one qustion i want make inverter 1000watts how to make 1000watts transformer and same use digram

  • Comment Link Friday, 02 November 2012 04:05 posted by ramil gamao

    good day!!! i have already created a power inverter from your diagrams, but how can i make a battery charger that is connected to the inverter... pls... send me the schematics... thank you in advance.

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