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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 .


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  visitPak 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 Wednesday, 03 December 2014 15:35 posted by imran

    @Abdulrauf bro mene ap k method se 50Watt ka Inverter Banaya hai.. Us me problem ye a rhi hai k me jab us se energy saver jala rha hn to wo sahi tarhan jaal nhi rha blink kr rha hai.... plz help me? Inverter Voltage bilkul sahi dee rha hai per ampere bilkul nhi dee rha ???

  • Comment Link Monday, 01 December 2014 17:11 posted by Mahdi smaelzadeh

    hello, I like convert 6 volt DC to 6 volt AC+/-. whose invertor am I used? Can I used from "500 Watt 12DC to 220 VAC Power Inverter"; without the Transformer. please help me with send diagram in my email.
    thank you

  • Comment Link Friday, 26 September 2014 08:09 posted by Abdul quddus

    sir kia ap mje 500w inverter ki video send kra sakte haein

  • Comment Link Sunday, 31 August 2014 05:42 posted by abdalla

    i would want to get the power inverter wattage chart

  • Comment Link Wednesday, 11 June 2014 20:29 posted by m rizwan yaseen

    assalamo alaikum
    new transformer banane tariqa bta den

  • Comment Link Thursday, 27 February 2014 16:34 posted by M.Waqas

    yar koi mujay ya batay ga k, is circuit ke kia frequency ha ???? ya ake free oscillator circuit ha jis ke frequency khz may ho ge, to itni high frequency par jo transformer hum use karaty hain who work he nahi karta ha, normaly hamara transformer 50 hz or 60 hz par kam karta ha , ya he reason ha k jis jis nay bhe ya circuit try kia ha proper result nahi mila ha , or na kabi melay ga specialy normal iron core transformer par,,,,,,

  • Comment Link Thursday, 13 February 2014 01:24 posted by waleed

    o.7/volt kasy produs kren yr

  • Comment Link Thursday, 01 August 2013 00:56 posted by shams

    transistar k base emmiter or colector ko kistara malom kar saktai hain

  • Comment Link ABDUL Tuesday, 23 July 2013 11:55 posted by ABDUL

    @ Piplu and manzar cheema this inverter can charge battery.

    @ nasib rahim
    Transformer information is available in this article table

    for this UPS you should use 7 amp motor bike battery or dry battery.

    @Sabeeh Ahmed
    kea aap ka transformer pure copper coil ka hy?
    agaar aluminum ka hy to amps bhohot he kam hun gy.

    approximately 0.5 watt

    Please check your wire connections
    @Mohammad Shoaib
    increase the turns of coil.

    Thanks you all

  • Comment Link Sunday, 07 July 2013 05:53 posted by Mohammad Shoaib

    hy sir i like ur ups circuit plz sir tell me how can i take 0.7v at sec....

  • Comment Link Saturday, 01 June 2013 11:19 posted by Amirali

    Main ne 50w ka inverter banaya but wo bahut thora current de raha ha energy saver start hi nai ho raha.please help

  • Comment Link Tuesday, 28 May 2013 11:33 posted by Partha

    what should be the 1K resistor wattage rating??

  • Comment Link Tuesday, 28 May 2013 11:06 posted by Sabeeh Ahmed

    @Abdulrauf bro mene ap k method se 50Watt ka Inverter Banaya hai.. Us me problem ye a rhi hai k me jab us se energy saver jala rha hn to wo sahi tarhan jaal nhi rha blink kr rha hai.... plz help me? Inverter Voltage bilkul sahi dee rha hai per ampere bilkul nhi dee rha ???

  • Comment Link Thursday, 16 May 2013 15:56 posted by ameen

    sir app mujhe bata sakte k mai konsi battery use krn plz mujhe sb smjh agae hay lakn ye nhy smjh k 12 volt kitne apm ki

  • Comment Link Tuesday, 14 May 2013 12:50 posted by waqas ali

    i am very happy 2 see that we can learn every thing about circuits and there introduction.
    thanks a lot.

  • Comment Link Wednesday, 08 May 2013 17:41 posted by nasib rahim

    i have nmade 200 watt ups plz send me trasformer deta

  • Comment Link Saturday, 04 May 2013 07:04 posted by Piplu

    i want to make an inverter with charger.shall i have a circuit for it.

  • Comment Link Saturday, 04 May 2013 07:04 posted by Piplu

    i want to make an inverter with charger.shall i have a circuit for it.

  • Comment Link Thursday, 02 May 2013 20:18 posted by manzar cheema

    bhi yaar mujay 12 volt battery charger banay ka tareka batay shokirya

  • Comment Link Monday, 29 April 2013 07:19 posted by Muhammad Awais Iqbal

    very very nice job you people are doing.....thanks


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