Make a 12Volt 10Amp, 20Amp, 30Amp, 40Amp variable transformerless electronic SMPS power supply

How to make a 12v 10Amp to 40Amp (ie 10A, 20A, 30A, 40A) transformerless electronic power supply SMPS based at home at very cheap price and compact.

By: Alok kumar

Today we are going to make a 12volt 5volt 10Amp, 20Amp, 30Amp & 40Amp all in one transformerless electronic power supply which is SMPS (switched mode power supply) which can output tremendous amounts of power in a small form factor. They have overload protection as well built right in, and even a 500W model can be made at reasonably priced with high efficiency. The voltage is incredibly stable. Giving nice, clean DC current even at high loads. 

For making this such amazing circuit you don't need to be from electrical background or either too many tools as weel even you don't have to invest huge money or you don't need to be very smart one.

Today we are going to simply convert a personal computer power supply to a highly stable , efficient, compact and beautiful electronic transformerless power supply SMPS based.

Actually we can buy a computers power supply at very cheap price or even use a old computer power supply ( you might have one in your backyard.) for this project.

Why we are converting a Computer's power supply to a normal general purpose transformerless electronic power supply because
for the same power supply from market you have to pay a 10 times more than the budget we are going to make and also the high wattage power supply you got from market may dont have overload protection and such high efficiency. Thats why we are making it because it saves our huge money as well we got variousbenifits like stable & clean DC, overload protection, high efficiency.

So lets get start this project:

All you need is:

1. Needle-nose pliers  computers "ATX Power Supply" or any power supply used in PC. 
   
   
2. 
   
3. Soldering iron 
   3 x "Banana Jack" Insulated Binding Post sets 
   
   
4. 1 x bag of "#6" Ring Tongue Terminals (16-14 gauge) 
                                                                                       
5. Rubber feet 
   
   
6. Small bit of heat shrink. 
   
   
7. Screwdriver 
   
   
8. Wire strippers

Posts Recommended:

1. Make a 12v 5Amp SMPS transformerless electronic power supply
2. Convert any SMPS to solar battery charger circuit
3. Simple 12 v 1 amp SMPS power supply, battery charger, LED driver circuit
4. Make 0~300V Variable Voltage & Current Transformerless Electronic Power Supply, LED Driver, Electronic Dimmer
5. Make 5V 1Amp Cell Phone battery Charger Circuit from 220/110v

Step 1:

First of all you need to get one  of this compuer's power supply for this project to make a 12volt and 10,20,30Amp...

We shoud first consider safety because project deals with high power capacitors. so forst unplug the Power supply from pc and mains leave it for 2 days to discharge and always put insulating gloves while doing this project.

  

Step 2:

Open up the ATX power supply or any you have to open the power supply it will look like below circuit diahram

opened power supply

Now here come the tiring or daunting task of shorting or identifying the wire from hundreds of different colored wire. Here the only color we care about is BLACK, RED, YELLOW, GREEN. Any other colored wire are not of our use so you can leave it or totally cut those off the supply.

Here the colour we care about represents:

YELLOW = 12 volts
RED = 5 Volts
ORANGE = 3.3 Volts
BLACK = Common Ground.

or you can simply check via a multimeter but be careful.

Step 3:

Now you are done. The only thing you have to do sort all same colour wire and group them together and connect them all. We have to connect all same colored wire together to harness the full amperage and wattage from this supply. Now the wire will look like this figure

Now technically you are done Yello and black wire will give you around 12volt 20Amp, red and black will give you 5volt and 32Amp if you need more amperage just buy a computer power supply of high wattage mine was 240watt (approx.)

Now what you can do is to make it beautiful and compact.

Step 4:

Now make a 4 hole as shown in figure and connect those group of wire according to given in figure and you are done.

enjou your 12v 20 amp, 5v 32amp etc...or more it will depend upon the wattage of power supply

Step 5:

Drill 4 holes like given in figure.

connect group of wires to those pins or any pins you have. But keep caution that these wire don't short with each other

Final transformerless electronic power supply SMPS based compact shoud look like this

Enjoy above beautiful circuit. For any querry please ask them in comment section.

Thank You for reading this post.

make 30volt 1amp transformerless power supply circuit

How to make 30volt 1amp transformerless electronic power supply simple and sleak at home.

By:Alok kumar

Today i am going to post an article about the 30watt power supply which id 30volt and 1Amp transformerless electronic power supply circuit for medium current application. This circuit is not only compact circuit but also cheap and compact circuit.This circuit an be made at home using easily available component at market.

How to make Transformerless or Electronic Power Supply/Driver

How to Make Transformerless 12Volt 1 Ampere or 2 ampere or more amperage compact DC electronic Power Supply or Driver/Charger.

By:Alok kumar


Today we are going to learn how to design and make the Cheapest and Smallest Transformerless electronic Power Supply or capacitive power supply 12v 1a or 2a according to our requirement. Actually there are many Power supplies available in the market but most of them are transformer/smps based and are very Big, Bulky, ugly, costly and have very complex circuitary to understand by a complete newbie.


So, lets get started to learn the design procedure so that we will be able to make the desired electronic power supply onward.


The biggest advantage of this explained circuit is that it is independent of input voltages fluctuations to a great extent


Here, we assume the input power source used here is 220V AC OR 110V AC 50~60Hz from home wall socket directly.


COMPONENTS REQUIRED:

C1= 400V, 1395K Capacitor or (Connect three 400v, 475k caramic capacitor in parallel or three 2uf/400v caramic capacitor) (Note if the mains current is 220v AC 50-60Hz if mains is 110v AC then use 250v/1395k).


[The above circuit is Verified and Tested circuit by me and works great, so make it, save money & enjoy.]

WORKING OF ABOVE CIRCUIT

In above circuit, R1 is actually doing nothing, but serve's the purpose of Bleeder Resistance, means it discharges the Charge stored in C1 gradually when the circuit is not in use( it may takes time between 1 to 15 sec according to its value and amount of charge stored).

This power supply is best suited for Capacitive loads like charging the battery, LED Drivers or any capacitive load...

So, By by reading the below post you guys will be able to design and make the power supply of any current rating and voltage rating according to your requirement. So please be focused and attentive to understand the technical specifications.


[Instruction: Above project deals with mains AC current & not isolated from AC mains, So be careful and work always under the guidance of any elder if you are a complete newbie. Please always remember to keep your one hand in pocket whenever working with any live circuit so that in case the current wont pass through your heart just for safety].

USE MALE AND FEMALE JACKS TO AVOID SHOCK BY CHARGED CAPACITOR.

In my next post i m going to post a circuit of 12V 5 ampere transformer less electronic switch mode power supply(or SMPS based) or Driver.


Posts Recommended:

1. Make 30volt 1amp transformerless power supply circuit
2. Make a 12v 5Amp SMPS transformerless electronic power supply
3. Make a 12V 10Amp, 20Amp, 30Amp, 40Amp variable transformerless electronic SMPS power supply
4. Simple 12 v 1 amp SMPS power supply, battery charger, LED driver circuit
5. Make 5V 2A Power supply by IC 78S05 simple circuit
6. Make 5V 1Amp Cell Phone battery Charger Circuit from 220/110v
7. Make 48V Transformerless Electronic Automatic Battery Pack Charger Circuit
8. Make a Laptop charger (efficient and reliable) from a car battery 12v

Today we are going learn a new type of circuit generally known RC circuit or capacitive power supply, which is the simplest and Cheapest circuit you will find ever.


I have created this Circuit during my research on how to increasing the power output of electronic or transformer less power supply for capacitive loads.


So now the question arises here is that - How to make this great and easy piece of Transformerless Electronic Power Supply or LED driver circuit at home.












C1= 400V, 1395K Capacitor or (Connect three 400v/475k or two 2uF/400V capacitor in parallel for 1.2Ampere or higher capacitance for higher current according to the calculations explained below).


R1= 10M ohm or 1M ohm 1watt resistor.


D1-D4= IN5408 (4 DIODES)( just choose diodes which have double ratig for our curent requirement for e.g. for 2 amp choose diode of rating 4 amp...)



R2= 10 ohm 1 or 2 watt.( 2 watt will be better for heat handling or dissipation)



C2= 1000uF(micro faraday) ,50 v ( 2 in number if you finds the output is fluctuating, connect them in parallel for better filtering of ripples produced due to rectification of AC mains current).


z1= zener of 15v to prevent any voltage fluctuations caused due to input voltage fluctuation to regulate our DC output to maximum of 15 volt max in extreme case.


{note: you must add a 10M or 1M ohm as a bleeder resistance parallel to C2 for Discharging the charge stored in C2 otherwise you may get a high current shock or surge current dur to charge stored in the capacitor if this charge is not discharged when circuit is not in operation it is going to remain for very long time and someone may get the shock. In later posts we will learn the techenique to remove any surge current by incorporating a crowbar circuit at the output. So simply to understand better this circuit and make it simple simply connect a higher value capacitor across capacitor C1.}


{Do not touch any terminals with bare hands even the Driver is Unplugged. First discharge the C1 and C2 by shorting the input and output terminal together. there will be spark generated while doing this this means charge stored is discharged completely by you now. Only after that you should touch any terminal, or leave for some time before touching the terminals so that bleeder resistance work for you to discharge the charge stored in capacitor C1.}

Calculations:

If we use 2uF/400V(because it is readily available in the market) THEN :


the capacitive reactance offered by capacitor(2uF/400V) connected at mains supply is:
x= 1/(2*pi*f*c) where pi is 22/7, and f is the frequency of mains supply eg 50Hz or 60Hz
then
now reactance or impidence ( or simply resistance) of whole ckt is = sqrt(R+x) where R is the resistance or load and wires all together attached in circuit and sqrt means squareroot of (R+X)
now out put current i=(v/z) where v= mains voltage 220v or 111v
So you can now calculate the capacitance of circuit according to the required current.


If you want to increase the output current just simply increases the capacitance value of C1 or just by Adding more C1 together in parallel if you are unable to find the appropriate value capacitor in market.


The C2 here only used as a filter to reduce the ripples in the output waveform.( it acts as filter to smoothen the output DC desired.)


Z1 is zener to protect the appliances from overvoltages.


If you want to decrease the voltage rating just use appropriate zener diode

If you wanted to increase the voltage rating of the circuit to double just use doubler circuit to double the voltage but the catch is that the current will become half and frequency become twice means 120Hz. so according to your requirement just increase the output DC current by simply adding high capacitance capacitor or add more C1 in parallel if you need high output DC voltage


For capacitance C1 related calculation problems or any problem regarding this explained circuit please reply in comment section and i will be happy to help by reply ASAP.


If you find above circuit interesting or useful please share it will be our reward from your side.

 Thank you for Reading.