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Hello friends

This is a tutorial about “How to make a 220V portable power inverter” This inverter is capable to power CFLs,tube lights,dc fan ext. it can handle up to 150W.even you can charge your laptop and mobile

Note: this is a 220v, 50Hz square wave inverter

Step 1: The Inverter

First things first. you need an inverter. I am using an IC based inverter just because of its price to performance ratio

Fig shows the circuit diagram of the CD 4047 based inverter. It’s a square wave inverter capable to handle up to 180W.to get maximum efficiency I am using IRFZ44 power MOSFET

These are the components you need for the inverter

1 - IC CD4047

2 - 18 Pin DIP IC Socket Base Connector

3 - 1K, 18K, & 100Ω- (1W x 2) Resistors

4 - 0.22µF Capacitor ( any type)

5 - 12V rechargeable battery

6 - PCB board

7 - IRFZ44 MOSFET x 2(use suitable heat sinks)

8 - 3 PIN PCB Mount Screw Terminal Block Connectors

9 - 12-0-12, 10A center tapped transformer

10 - wires

The total costs of these components are less than $20 (1500 Indian rupees)

Fig shows the finished circuit. Designing of the circuits is deepening on your ability. I am not an “electronics man” so I am using an ordinary PCB board

Step 2: The Box

Now

we want to make a box .I am using an old ups box as cover and some plywood to make the base

You can use any type of box or container for your inverter

My box has two parts. One is a plywood base to mound everything and second is a metal cover to protect the components

Step 3: Fitting and Wiring

Now we want to connect the whole parts together

Fig show the whole circuit

Now we can put everything inside the box

I am using 6A three pin sockets as outlet with a 6A switch

Finally I added stereo jack connector as charging port

Step 4: Charging

I am using a 15v 2A homemade charger to charge the battery

This is the circuit of my charger

The best part is you can also charge the battery with solar panels

Step 5: The Moment of Truth

Now this is the finished portable power inverter

You can carry it anywhere you want .total weight of the inverter is around 3Kg

1.can i use a 6v rechargable battery along with a 6v transformer for this circuit.<br>2.is there any other mosfet for IRFZ44.<br>Thanks for ur reply in advance.
every MOSFET have a certain threshold voltage like 4 v for IRFZ44<br>ensure that your MOSFET will get that voltage<br><br>you can use IRF540.630,840..... result may vary<br><br>using 6v battery and 6v transformer may be a crazy idea ;)<br>
<p>what can i do to increase the power output of the same inverter, please somebody help me ...!</p>
this circuit is not working for me..pls help
<p>sir, i made a inverter but how to find the circuit is work with out transfomer</p>
<p>may i know, if inverter only support 25W but our electric device consume about 50W. what's happen to inverter? </p>
<p>hi, i can't find ic4047 is there any any replacement for it? Thanks.</p>
<p>Try using a p and n channel mosfet to make a cmos inverter for the signal of the 555 timer. Then use it to drive the mosfets to produce the square wave, else the ardunio could work rather well.</p>
<p>a good try</p>
<p>You do realise that transformers do not like square waves. It is going to have 50 hertz dc components. Inductances have practically zero impedance for dc current. Watch out otherwise your transformer is going to get hot. BTW this would be useful only for resistive loads like heating or universal (AC-DC) motors. Don't use on anything else.</p>
<p>do to lack of knowledge in electronics,i dont know the problems of the square wave</p><p>but sir. i am still using this inverter to charge my mobile every day.i can't find any unusual things</p>
<p>Laptop, cell phones, and most modern power supplies are very tolerant of most things. Despite big transformers not liking square waves (little ones don't mind nearly as much), you'll find that your inverter will work for most things because the transformer will make things &quot;less square&quot; because it acts as a very large inductor (for motors, it might make them noisier/hotter than usual, but they should still work).</p>
<p>yes sir.my AC table fan make a grinding noise when i connected it to my inverter</p><p>but today i found something strange.wen i connect my table fan to my office UPS(APC RS 1500VA)the same grinding noise is coming from the fan!what is the meaning of that?is that UPS is not a sine wave inverter?</p>
Is your inverter able to drive an led TV?
<p>yes! but not safe</p>
How much wattage an led TV take.
<p>It should be safe, modern TV's use a SMPS or switching mode power supply that is very tolerant to a wide voltage range and will even accept DC if it is within the voltage range of your device.</p>
<p>Most UPS's aren't pure sine wave either (it's costly and most people use UPS's on computers which don't care what shape the wave is in). Some are (used to be some computers cared a bit, and those audio people always care), so you can get &quot;stepped sine&quot; (usually 4-6 levels), or you can get a pure sine inverter at extra cost (and the labels on the UPS/inverters usually boast about that).<br><br>If you want to cut down on the noise a bit, you can put a capacitor across the output (beware -- these are specially rated caps; see http://www.vishay.com/docs/28153/anaccaps.pdf), and it will reduce the high-frequency noise a bit (at the expense of making the transistors warmer).</p>
<p>You are lucky in this regard. Most phone chargers (not all) are SMPS based so they can handle square wave. Even the load is minimal, , &lt;10 watts for fastest charger, so chances of the transformer overheating are minimised. Unless you are far away from wall outlets or there is no service why would you want to carry this monstrosity everywhere? </p>
<p>Maybe they do not have reliable AC power all the time so they can use this with a solar panel to have a stable power source.</p>
<p>'no sir , i don't need a 3 Kg inverter to charge my phone :)</p><p>but i am still testing my inverter to make it more batter</p>
<p>I am facing problems-</p><p>1) 0.22 uF is unavailable in our country.</p><p>2) 100 ohm(1W) is unavailable but 100ohm(5W) is available in our country.</p><p>3) The rating of CFL bulb is very very less than 10A.</p><p>Please suggest solution to the above problem asap.</p><p>Thank you.</p>
<p>You can simply place capacitors in parallel to add up to the required value. 100 ohm 5 watt can comfortably be used in place of the 1 wall resistor. No problem except for size. In fact it would be better choice from safety point of view.</p>
<p>yes you cam make .22uF by placing capacitors in parallel but NOT SIMPLE</p><p>if c1 is .33uF and c2 is 1uF</p><p>Total capacitance = c1c2/c1+c2</p><p>= 0.24812 uF</p>
<p>You are sadly mistaken. Refer back to your text books. If you connect the .33 &micro;f and 1.0 &micro;f in parallel you simply get 1.33 &micro;f and not 0.24812 uF as you have said. </p><p>Here is a link for you that explains properly. </p><p>http://www.allaboutcircuits.com/textbook/direct-current/chpt-13/series-and-parallel-capacitors/</p>
<p>OMG!!!!!! sorry :(</p><p>i mean Series</p>
Thank you very much for your reply :) . But what is the solution of third problem?
I think you mean 10 W and not 10 A. 10 A would mean at least 2400 Watts at 240 Volt supply. O beleive even CFLs have a tiny inductor to initiate the lamp by an ionizing high voltage pulse. Perhaps you could try it and give us your feedback. Should not be a problem though. The load might be just too low for the circuit to operate reliably.
<p>1) try to find sum from old electronics</p><p>2) use 100 Ohm 5W</p><p>3) need more informations?</p>
Thank you very much for your reply :) .But what is the solution of third problem?
Can be use with 300W(25A) transformer?
Hi vina sorry for disturbing you again, but could you tell me that why the MOSFET IRF630 in circuit undershown becomes very hot. Is this a defect? Or it is common. tell me about your experience with this. Does using the IRF540 makes any difference? Please tell me..
<p>heating MOSFET is not a big problem but check all connections one again.these are main error indications i find in my test</p><p>1) one MOSFET is hotter than other one</p><p>2) output load is blinking(if load is light)</p><p>3) transformer became very hot</p><p>IFPZ44 is better than IRF630 and 540</p>
Please explain about the transformer and where can I find a transformer like this
You just have to say the shopkeeper that you want a 8 Ampere 12-0-12 transformer or you can also use 5amp
<p>you can use any 12v center tapped transformer for this inverter.this type of transformer are known as 12-0-12 transformer.you can use 1Amp to 10Amp transformer.the output is depends up on the amp of the transformer like 10Amp transformer can handle up to 120w load</p><p>you can buy from any electronic shops or from online stores</p>
Yes you are right 1st probleum :-one mosfet is hotter than the other and the hotter one got damaged. <br>2nd :the output load (15watt CFL) is blinking <br>But all this happens with IRF630 always. But two days ago one IRF540 was also doing the same and got damaged. Now i have changed MOSFETs by new IRF540. Now it's working good, but don't know how long it goes. And worried about future. I'm using 12v battery 7.6ah.<br>See images of my circuit.
Hi vina, yes you are right 1st probleum:-one mosfet is hotter than the other and the hotter one got damaged. <br>2nd :the output load (15watt CFL) is blinking. <br>But 3rd problem don't occur. <br>But all this happens with IRF630 always. But two days ago one IRF540 was also doing the same. Now I have changed them with new IRF540 and it's working good. But I'm worried about future. And did using mosfet ifp44 helped you?
<p>OK i got it. that's the problem.a MOSFET without heatsink just like you put it in a oven. you must use a heat sink to cool down the MOSFET (just like my design or better)</p><p>IRF540 and IRFZ44 are have very high temperature range up to 175 c</p><p>but IRF630 only have 150c.that's why IRF540 survive the second test.</p><p>you can use IRF540 for light loads.but IRFZ44 can handle more load</p><p>up to 60W in your case</p>
Hi vina I want one more help, I can't find the actual fault , the MOSFET IRF 540 is working very good without heating but there is sound coming from transformer and the output load of CFL or bulbs are having a very minor but considerable blinking some times
Hi vina I want one more help, I can't find the actual fault , the MOSFET IRF 540 is working very good without heating but there is sound coming from transformer and the output load of CFL or bulbs are having a very minor but considerable blinking some times please help me.
But IRF540 don't heat up since two days it's working good right now. Now I don't have access to spent a lot of money right now because earlier I have spent unlimited money now tomorrow I will get my Amazon order of cpu processor cooling system which consists of one cpu fan and one heat sink for processor, so can I use that? (if I put those two MOSFET under that?) I have also seen mosfet IRFZ44N on amazon it's of Rs 199 2ps I don't need to buy electronics component from that but my father is sick and he only finances me. See photos of that system
Hi am a fan of your circuit. Please I need your help regarding my circuit, please see the circuit I just wanted to ask you that how can I power a 15w CFL with this circuit. Right now I am using a 5Amp transformer. So could you tell me some modifications to do in this circuit. Please I need urgent help
5a 220v transformer is more than enough to power ur 15w bulb
Then what should be the battery ratings (amperes)
<p>if you want to light up a 15w bulb you need at lest 15w input</p><p>that means you need an input of 12v at 1.4A(12 x 1.4 = 16.8W)</p><p>100% is a jock.</p><p>that means you need at lest 12v 2A input for get 15W output</p><p>use a 12v 6Ah battery for your project like me</p>
And how much 'ah' for the circuit I want to make.
<p>Ah means ampere-hour</p><p>a 6Ah battery can give 1A current for 6hourse</p>
<p>if you want to light up a 15w bulb you need at lest 15w input</p><p>that means you need an input of 12v at 1.4A(12 x 1.4 = 16.8W)</p><p>100% is a jock.</p><p>that means you need at lest 12v 2A input for get 15W output</p><p>use a 12v 6Ah battery for your project like me</p>
<p>this is an old circuit that used to generate pulsed DC.before salecting IC inverter i made one of these for test.and wok well for lover loads up to 40W</p>

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