1A boost current to 6A 7805 12V to 5V
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- 7805 is a voltage regulator integrated circuit. It is a member of 78xx series of fixed linear voltage regulator ICs. The voltage source in a circuit may have fluctuations and would not give the fixed voltage output. The voltage regulator IC maintains the output voltage at a constant value. The xx in 78xx indicates the fixed output voltage it is designed to provide. 7805 provides 5V regulated power supply. It can deliver 1A of current. however, in many cases, we need high current. 7805 will need to add an NPN transistor. D718 is an example. It can deliver up to 6A of current (with heat sink) . The circuit is simple and easy to assemble.
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Great video, and could u tell me what the first song is and who it is? Please
Sir please tell can I use D 2061 npn transistor and 7805?pléase tell
I'm not sure.
Ok
Very usefull circuit!
Hi, I've been working on a circuit to power a Raspberry Pi 3 with a 9v battery lowering it to 5v via a 7805, I think your circuit could help me out, but I have two doubts, does it work with 9v instead of 12v?, and what's the current you're feeding the circuit with?
You can give a input of 7 volt to 37 volt with 1 ampere.
Maybe it will work .😊
Use other transistor
Yes it will work as long the voltage input is 6-37 volts, you will be fine, however you need decent amount of wattage to power it up
i do follow your circuit but i don't receiver 3A. i dont that why i cant receiver 3A.
hello sir.. can i use this to charge my cellphone?
Of course, it worked very well
@@PhdHung and can I use a Samsung cellphone with a value of 5v 1.2A?
Nise
Input current
Hi
hi bro
Does the current depend on input?
Xin cho biết 4 con trở sứ là loại nào vậy anh. Cảm ơn nhiều
loại 5W bạn
Hello sir.... I used this circuit for charge my phone But doesn't give me more than 1.5 A = 1500mA which when I use phone charger gives me 2380ma =~ 2.4 A for same phone...where is the problem..please tell me??
You can increase the voltage a little bit.
Couple things. I used a TIP41C instead of the D718. I wired it up to your video. You have the diode pointing to the negative side. When I powered up the diode exploded. I rewired a new one in pointing to the positive side. At the end of it I'm getting 11 volts instead of 5V . I don't get it.
Is the pin order of transistor correct?
In reverse bias the ground will be like open to the ic hence it will not work.
Did the diode exploded or burnt?
I suspect your ic or 12 volt supply was bad.
The transistor will not damage the diode normally. Only if it is faulty and there is a short between base and emitter and there is a short circuit in the output and the ic is without heatsink then there is a chance of the diode burning up.
Tried this... doesn't work...
Nice video,, absolutely informative...👍 What is the voltage drop when the resistances and the bulb in parallel were connected.. because I can see the bulb slightly dimmer than before...thank you.
Can I use a LM317 with 2N3055 15a NPN power transistor. Then I can regulate 15a current. if possible then please make a video on it
And please make video on how to make lab bench power supply with audgestable
voltage and current
Good idea, I will do it
Just found your video..great circuit, ive 12v 10amp and i want to drop it to 5v..can i use this circuit..tx..
Yes
I want to 12 v 10 amp dc supply at output .
Then plz suggest me what is requirement for it .
Plz
Reply
And how many input voltage and current are required
Replace 7805 to 7812
Just display charging indicator and did not charge, I test that.
How many volt for the capacitor
>15V bro
It's working very nice😍😍.thanks bro.
congratulations
Bro i need ur help. Can u please contact me on 9888061639
Hello, I want a circuit that increases current without increasing or decreasing voltage and I want it to work on about 3 volt. could you help me please.
I think it's impossible
I want one too! But, something about free energy and 2nd Law of thermodynamics makes it IMPOSSIBLE!
@@kenbarnett9415 how comes it's impossible \\?
amr mustafa try to use lm317 with mj 2955 transistor for hight current and kind of vairiable voltage to...
@@teguhgumilar2713 Because of Power. Power is energy. For example, 6v at 2A = 6x2 = 12W, 3V at 4A = 12W. Both require the same amount energy. Now if you increase the current and keep the voltage the same, say 6v at 3A, you need 18W of power. The only way to do this is to have a larger power source.
If the input 19v and my regulator lm7812
I must change any thing?
thanks friend. Could you tell me what function the diode plays in the circuit?
If there is back current through cell phone it can mess the charging system and diode conducts only in one direction .It's been positioned from battery to mobile
To increase the output by .6 - .7 volt to compensate the forward drop of the transistor.
Thanks for sharing this great video, I hav solar panel outpout 21 v o.5 amps can I get 14v 6 amps?
no bro. u need module buck
It is a little late. Hope this will help someone else also.
21 v x 0.5 amps = 10.5 watts.
Now you cannot go above that 10.5 watts in anyway as that is the amount of energy you have in hand.
So 10.5 / 14 v = 0.75 amps -- the max amp you get if you convert to 14 volts ( practically little lesser due to losses in conversion circuit)
10.5 / 6 amps = 1.75 volts
I believe you wanted to charge batteries, which is why the 14 volts.
Let me put a calculation which may help someone.
10.5 watts x 90% efficiency = 9.45 watts
Converter circuits generally have efficiency a little above 90%
9.45 watts x 5 hours of sunlight = 47 watts.
47 watts / 12 volts = 3.9 Ah
That is a 12 volt 4 Ah battery can be charged in 1 day with that panel on sunny days.
At night that system can light one 5 watt led buld for about 9 hours. Two 5 watts bulb will work for about 4.5 hours.
To take output of 3A how much current we should input with 12v.
I have a 450mA 12v transformer and after the rectification it drops to 9v.
What will be the output with my transformer?
Kindly explain me.
Thanks in advance.
you would have to calc to power ratios and also take losses of the .7805 into account ....but 450ma is far too low. Lets calc the watts.
output = 5v x 3a (3000ma) = 15Watts
input = 12v x 0.45a (450ma) = 5.4Watts
so assuming 100% efficient conversion
12v x 1.25a (1250ma) = 15Watts
Great video 👌... simple question ..why u added the capacitors?
Capacitors make the output voltage stable
I am making 24v 10amps smps my output is 410mA I want to increase current at 10 amps how I will get 10amps in output without Changing output voltage
Could you please share circuit and have you used transformer or smps either direct capacitive dropper for 12v supply as input to your circuit.
Plz help
You can see at the end there, the voltage constantly drops which means increased resistance from the heat the 7805 and the transistor produces... how can that be fixed ?
Sar main bike Mein Ek LED light Banai hai use LED Mein Ek LED 3.4v 1.6 watt 0.35amp ki hai meny 3 LED ko 1 series Mein connect kiya hai aise hi total 4 series hai aur serious ko pela Mein connect Kiya Hai isko Mainy 7812 IC se connect Diya Hai aur ismein 7 Home ka resistance use Kiya Hai to usmein kaun sa capacitor use karun
Sorry . I don't understand
@@PhdHung led me input 12v h our led 3.4v ke h 3led ko Sirius me conect kiya h to konsa capacitor use krau
ThankS 👍✌️
tks bro
You from?
I am making 24v 10ams smps my output is 410mA I want to increase current at 10 amps how I get 10amps in output without Changing voltage
Ferin Arakkal I am looking for the same thing. I want a circuit that increases current without increasing or decreasing voltage. If you please find this circuit could you comment on this comment
Can I use IRF540N
ok bro
If I use two transistors in Parallel on this circuit will the amp increase more than 6 amp?
super ... thanks .
I would like to ask a question. Why use 1 N 4007. Is there a frequency or other reason?
The output of that regulator is only 5v. Adding diode to the ground can add voltage up to 5.7V.
Can this boost current values less than 1 amp?
Is the resistor contained to the load? Have white colour!
i would like to know< how to do 1A 12V to 5A 12V booster?
Bhai kya aap is pr video bna skte ho jisse ampere increase ho pr voltage decrease na ho( please )
Hi friend if i used any npn transistor like bc547 then what happen???
you'll get less current.
sir what IC is used when we convert 18v to 12v instead of 7805
7812
How much is the input current?
Can I use 4.7uf capacitor instead of 10uf capacitor.
yes, ok bro.
Hi, I am using the LM7805 for phone charging project and I’m experiencing a big voltage drop under load. Instead of providing the 5 volts like I does under no load, it drops to about 3.5V when I add the charging circuit. What could I do to solve this problem? Thanks.
Capacitor
plz tell me the volt of capacitor are not depended only same uf
16V or more
sir what is the value of ceramic resistor?
Nice ... If I need 12V, can I just change up to a 7812 and keep everything else the same ?
yes. Increase capacitor voltage to 25V.
it didn't work it did even decreases the current
U have used 220 uf and mentioned 10uf wtf
How to increase only current keeping the voltage unchanged??
Its not possible. The energy at the ends depend of ur input. If u have 20W (10v - 2A) and u need 5v and a higher current. U can get 5v and ~4A(~20W). U'll lose some energy at transformation. U cannot get 10v with a higher current than ur input.
It really works .. let's try
Hi, you mention the Capacitors are 10uf and 1000uf but what are the Voltage values for each?
I see some 1000uf rated at 6 volt's and some rated at 50 volt's.
all cap 25V
@@PhdHung I see, okay, thanks for the reply.
Sir can I use this without heatsink??
If you use 1> 2A, you do not need heatsink
I want 3 amp
what else other transistor can we use instead of d718 as current amplifier.
Any NPN transistor can be used
Can i get 5A using, 12v 2A stepdown transformer ?
yes, ok
If D718 is not available in my place then what is alternative?
you can use any N transistor
@@PhdHung bro i am not into electronic components , the shopkeeper didnt understand what you said .. please specify any famous model
Just display charging indicator and did not charge, I test that.
Dear bro, 10 uf volt ? and 1000 uf volt ? Plz answer
All 25V
Sir hum transistor ki sankhya badhka kar current ko aur badha sakte hai
thank you so much for this video. its very helpful. but i have a question. i am currently working on school project and i am applying this circuit to charge a 20,000mAh power bank. but why does the power bank only draw 0.25A from this circuit? while it should be able to draw up until 2A for charging as stated on the product?
Does it draw more current at 5V input with normal phone charger?
How much is the input amps?
This circuit is a hoax, no way that this will increase the LM7805 capacity. All he does is his biasing a powertran (what you btw could do on many other ways) to let through some current between it's E and C it will defo not even be neither 5V nor stabilized. Saying that you can use "any" NPN transistors is a lie as well. It will depend on the biasing on the transistor what the output voltage will be and even IF you would bias it to give out 5V that would not be a stabilized 5V voltage.
Capacitor kitne voltage ka lena hai
the best electronic projects on youtube , very useful projects , thanks!
J'ai aimé cette vidéo, bonne chance, j'espère participer sur ma chaîne
What is the source current?
Can i use 2SC2625
9594?
For our final year project the piezoelectric transducer by footstep the out put of the piezo is variable voltage from 6v to 12v and the current is 30micro amper . I want to increase the current to 500mA or 1A
use opamp
@@PhdHung
Dear sir.
may you design a cricuit for us...?
which we required current 1A for fast Charing of the battery.
The output of the piezoelectric is very low as near to 30 micro amppers. which is not enough for the fast charging. we use a transistor for high current gain but it's not work according to our requirements.we insert a 300mAh battery which require 30mA current for Charging but it's take too much time for Charging like (300mAh/30mA=10h) 10 hours. So that's why we required a fast charging circuit for piezoelectric transducer.
Unfortunately
Power In = Power out. And
Power = Voltage x Current.
If you increase voltage current will decrease, and if you decrease voltage current will increase.
Did you try connecting a bunch of them in series and parallel? Does that make any difference?
Da pra fazer um amplificador com o KIA 7805A da TV toshiba?
I will try
@@PhdHung
Quais componentes usar?
I dont think I need 6 amps for some leds and ics :P
My solar panel outputs 100ma . My battery not charging . I am making power bank
Please advise will this give 1 amps atleast
Input amps
6A/ 12V
@@PhdHung
No no brother output Voltage 5v 6a
Video input volt amps
Hi... i used 7812 and gave input voltage of 15... but the output voltage is same 15v .... :-( its not regulating.... i need 12v output ... Help me...
Can we use this for mobilecharger
Yes, of course
Transistor base current is used to switch ON the transistor. 7805 is just used to give 5 volts which is switching ON transistor. How it could control the output voltage i did not understand the logic
What's the input current here
its fake ?? Capacitor 220uf 25 volt and you type capacitor value 10uf in diagrame what is this dear
can i get atleast 1A if my output voltage 8v, but current too low like 2 - 3 mA?
i would to ask you something. what is different ciment resistor WAT & OHM. and how ho choose correct WATT & OHM to every voltage? actually i'm newbie but this is my hobbies.
For input 0.5Amp, 12v transformer to bridge rectifier and then 7805 . Can I get 5v and above 1 amp output
can i user ir3205? ..
Can i use D718 for 7808 ?
I want get output 8V 5A
If I connected two 7805 in parallel???How would the circuit be??
the npn transistor collector not connected to the heatsink if I'm not mistakenly see. So the ic output not connected to transistor's collector and the heatsink also output of the ic ?
nice video but kindly can you inform how we can use this circuit as variable current and voltage power supply. i need 5 volt, 5 amp variable power supply for my LAB so what modification should we added to this circuit. thanks. if not both then at least its current should be variable.
You can use LM317 and transistor. if you want i will design it.
@@PhdHung that’d be great!
@@PhdHung did you make video for design 5v 5a?
i wanted the ampere is 2a/3a is it possible to use the D718? or do u have another suggestion?
What you using the diode for and why are you putting two caps on the output line and neglecting the cap which should be there on the input ?
If I want to step down from 12v to 9v, I only need to change the IC 7805 , right ?
Is this works on 7812 regulator, with input 19 volt?? Plz tell me
If the input 15v and my regulator 7812 I must change any thing ?
100w Invater repar
Sir 12v to 7.9v or 3.8v circuit
u need LM317
capacitor kitne votage ke hai ?
Solar panel use karsakate sir
What is karsakate
Capacitor kitne volt ka hai
thx to this video ,, but What is Amper at Input source ....??
V input < 35
:D
Can i use it for mobile fast charger?
Just display charging indicator and did not charge, I test that.
Suppose If I input 24v 1amp..
then I get 5v as an output voltage or not???
But while connecting the 5 watt resistance it may get damaged due to high power output