How to Make 12V Regulator Using LM7812 IC | Simple Ideas | Javier's DIY
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- How to Make 12V Regulator Using LM7812 IC | Simple Ideas | Javier's DIY
The ic 7812 is a positive voltage regulator which means that it generates the positive voltage with respect to the common ground. In case if both the positive and negative voltage supply is needed in the same circuit. The voltage regulator ic 7812 is combined with its corresponding 79XX family IC that is 7912 IC. The IC can handle maximum load of 1A to 1.5A but the input current should be 2A to get 1A to 1.5A at the output.
Component's Needed:
° LM7812 IC
° 25V 1000uf capacitor
° 16V 1500uf capacitor
° Heatsink
° insulated wires
° soldering
° 23V powersupply input
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👉 / javier'sdiy👈
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#12VVoltageRegulator
#LM7812IC
#VOLTAGEREGULATOR
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Good job boss
Great job with the old 7812 :-)
Thank you
Nice work
Thank you sir.
Is there any way this could be adjusted to put out around 13.5v? I am trying to charge a 12v battery with it.
You need to have an adjustable voltage regulator sir
7812 will only output upto 12v
YES! put diodes in series between the IC ground pin and the actual Ground. READ THE DATASHEET!!!!!!!!!!!!!!!!!!!!!
There's a battery charging and protection module made for just that
Can we use it for 12 volt amplifier (PA Siren set) in vehicle..?
No sir because the output current of this projects is not enough to power the amplifier.
@@JaviersDIY then any other option..? Please help me
@@mrghost8145 you need to have a 12V Powersupply with a high output current like 5A up.
Will the transistor burn without capacitor
No sir but it is important to have a capacitor
Could you provide schematic for lm7812 with 2 tip3055 in paralel?
I wanna know what capacitor and where're they located, current output should be upto 10A
good video. but what if I use the LM7809 ? how much value of the elco that I should use? sorry, my english is bad
The purpose of LM7809 is to stepdown any voltages around 35V to 9V positive supply.
very good
Thank you
that is the electrolytic capacitor or non-electrolytic capacitor ??? i can not see it clearly ? pls tell me ?
Electrolytic capacitor sir
@@JaviersDIY It means there are 2 pole, that is positive pole (+) and negative pole ( - ), Right ?
Can I use 2200µF 50V and 1000µF 16V? I have only over 35V power source and I need to regulate with 12V output. I don't think the output is doable since you used 1500µF 16V caps.
Yes sir you can
@@JaviersDIY Alright thanks!
Did it work @@jaypormei1881
Posso usar 1000uf 16v?
uf capacitor is necessary? Can we get 12 voltage without uf capacitor?
Yes you can get but it is necessary to put a capacitor
@@JaviersDIY Ok thanks❤
Your welcome sir. Come back again sir
Thanks
Thank you sir.
Can I give 36volt to the 25v input capacitor and will it be safe for capacitor and the ic
Tha capacitor will explode sir it is because you exceed the maximum input voltage.
It's better to change the capacitor to the higher one
Is that 12v dc strong enough to work well with 12v 60watts LED television please tell me
No sir because it only give a maximum output current of 1.5 amps
@@JaviersDIY ano ba
How many amps would be the output of it sir?
1.5A sir
Can I use a 12volts input in this?
No sir. The input should be higher than the output voltage
is it 2A or 1A coming out
It's only 1.5 Ampere sir
@@JaviersDIY thank you
but is there any way that i can increase the amp
@@JaviersDIY question
I'm using a 7812 transistor to reduce a 20v drill battery to run a 12v speaker box. That part went well but when i turn up the speaker bass the box shuts off.
(someone told me that there isn't enough ampere but im not sure)
it there any way u can advice me what to do
thank you
Q ocurre si Vin picos de 120v CC?
For better understanding please use the universal language
Well it’s not 12 volt output is it ?
no, it a 12v regulator so the outout would be 12V
Apakah pakai elco yang uf dan voltasenya lebih tinggi dari yg dituturial bisa..... 🙏🏻
For better understanding please use the universal language
LM7824 ka video place
Sir, Can I use a 50v 2.2 uF capacitor at the input side and a 50v 0.1 uF capacitor at the output side?
Yes sir
Can it pass 10 ampere current through it
I want to use car audios system transformer with bridged rectifier gave 20volt output it will damage
No sir. The maximum input current is only 1.5A
@@JaviersDIY what can I do to reduce the voltage to 12v 🤧
👍👍👍
Thank you sir
Maximum current output?
1.5 Ampere sir.
Fail
Nice work
Thank you sir.
Good day sir, can i use this in my 24volts jeep using 12 volts Led tail lights (signal light, break light and back-up light)
check tha Max voltage iin the datasheet. Include the charging voltage (maybe 28V
nice project
Thank you sir. Let's support each other.
Were you able to get 1 amp through it without overheating at that input voltage and with that small heatsink?
No sir. If current exist, heat exist also because heat is the output of the circuit.
How to choose the desired capacitor according to the input and output voltages?
Use capacitor that would fit to that output voltage that more than the value
If i add 18 volt dc input then can i get 12 volt dc output?
Yes sir.
Javier, important question: what if my input voltage jumps a lot? Say, from 8 to 14 volts (imagine it's car bus). Will it help to put BIG capacity before LM or I need smth else? What will happen if I put big capacity *after* LM?
READ THE DATASHEET a large cap the IC can destroy it! use a boost-buck converter
what if it is a 12v battery that can get charged up to around 15v and want to use led strips on 11v dimmed@@kennmossman8701
what is the function of both capacitors for LM Ic ?
To make the voltage smooth especially in the output.
@@JaviersDIY thanks a lot🙏
WHAT IS THE VALUE OF THE RESISTOR BRO? TNX...
there is no resistor in the circuit sir
How many amps would be the output of it sir?
Only 1.5A sir
How many amps would be the output of it sir?
1.5A sir
El trasformador permanece conectado o solo para cargar los capacitores.
For better understanding please use the universal language
como vas a desconectar la fuente de alimentacion??? que clase de pregunta es esa... un capacitor no es una bateria... si lo desconectas obviamente no va a haber ningun voltage despues de unos segundos...
Can in user 1000uf 16v??
yes sir
@@JaviersDIY tranks 👍
Hi, out put shows 2.8 volt why
how many input voltage you put?
Is this Dc output or ac
DC sir
Hi. In the manufacturer's datasheet, the values of the capacitors are 0.33 uF and 0.1 uF (non-electrolytic). You use two 1000uF both electrolytic capacitors. Are you sure it is allowed, or even better? Ty
Yes it is allowed since it is just a small circuit
Can you help me? I need to regulator 14.4 volts dv down to 12 volts dv at 200 amps. I am connecting solar battery bank to computer.
Buy a module sir to compensate your needs.
bossing... pwede b yan supplyan ng 24V tulad ng mga battery supply s mga trucks (howo, giga, super great)? d ko alam kung ilang amperes ung supply n mangagaling s battery, pero malamang mataas un. lagyan ko kasi sana ang truck kong dina-drive ng 12V n LED (kadalasang gamit s motorsiklo) ksi maraming pagpipilian at mas mura.
English naman!
Costei
for better understanding please use the universal language
Porque en este circuito se calienta el lm7812, como evitó ese recalentamiento
For better understanding please use the universal language
Nice!
I'm trying to go from 36v to 12v to run a led light. I need to limit voltage down to 12 from. 36
You can use that one sir.
Good advice for destroying the IC @@JaviersDIY
48v adapter ko 12v me kese change krenge
For better understanding please use the universal language
Sir why u use the 25 v capacitor input side and 16 v at output side
Because this is a voltage regulator meaning to say the input voltage is much higher than the output voltage, that's why I put a higher capacity value of the input capacitor
Can I use different voltage capacitors
Can I use 50v 2.2uF capacitor at both the input and output ends? Please note that I have a 12v battery with more Ampere. I want to take input for the l7812 ic from this 12v battery. Though the battery is already in 12v. But I want to get 12v output with a more assured voltage value of 12v and I want to get limited current flow.
Yes sir it's okay to use that capacitor
@@JaviersDIY Thank You Sir !
A capacitor of 0.22 uF is recommended at the input and 0.1 uF at the output. This is for stabilization and prevents the voltage regulator from oscillating. The huge electrolytic capacitors here are exaggerated and useless. The voltage regulator is pointless for your use, since it has a 2 V dropout, i.e. to get 12 volts at the output, at least 14 volts must be present at the input. In addition, a voltage regulator, as used here, is not a current limiter.
If you want to learn more about the LM7812 (or any other voltage regulator), take a look at the datasheet.
@@wernerpeter9706 it is a very well said sir. Thank you
Input capacitor should be 0.33 uF according to datasheet. @@wernerpeter9706
Does the 7812 transistor stops working when it get over heated and starts working when it get cooled ...?
No sir. Once it burns the IC it will not recover. It is very important to put a heatsink to absorb the heat.
@@JaviersDIY What is the max input voltage and ampere for 7812 Transistor sir ..?
@@tn7719 5A below sir.
@@tn7719 from data sheet i can recall the input being upto 35v and max current of 1.5A
What difference does it make if you use capacitors and if you don't use them? Can you tell me what is the job for the capacitors in this project?
A capacitor is a two terminal device that store energy in the form of electric field. When voltage is applied to the capacitor, it starts charging. When capacitor is connected to any device such as electric bulb, it starts discharging. So that's the job of the capacitor in my project.
@@JaviersDIY Thanks. Some people in TH-cam use L7812 to regulate e.g. 18v into 12v without capacitors and it seems working. What if you remove these capacitors, what trouble will it have?
@@netdedouga there's no trouble if you will not put a capacitor
@@netdedouga I think capacitor is needed to smooth voltage jumps (on both, input and output). It's always good idea to put capacitor.
@@daitedve1984 READ THE DATASHEET!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! This video is WRONG BTW
Hii Sir I Want To Regulate 14v Dynamic Voltage into 7v Regulated Voltage What Should i Do?
Try to use adjustable voltage regulator so that you will only adjust it to the voltage you like.
sir what is the value of the resistor you're using in the led light ?
Sir there is no resistor their. I directly connect it.
brown black red is 1K
@@dstpollo7410 Thank You...
I don't use a resistor sir
@@JaviersDIY sir i asked about the value of the resistor used in that 1.5 volt red led @ Bridge rectifier + 4 filter capacitor near the transformer...we can clearly see the blue resistor @ 3:26
cant this circuit use for an input of 12-13v to get an output of 11.8-12v?
Yes sir
But it's shows only 2.8 volt
i would like to see 12v batter in and output 3 ~ 5 12v 1-1.5A draw stable low head diagram :D
are you making cake..........batter
Javier, note: if you apply your "device" to power LED, you do it completely wrong. On LED you should supply voltage AT LEAST enough to feed all of 'em, even 200V!! But what you should limit/regulate is CURRENT! Current must be same as LED needs.
i can used 7815 IC with capster ¿
your assertion lacks context. For a LED strip CV is good
Can I add 3 ICs in parallel to get 3A current?
Yes sir. You can
@@JaviersDIY thanks Sir, does it over heat?
No sir. Just put a heatsink in all ICs
@@JaviersDIY thank you, will keep you updated!
@@PavanPyati Thank you
How to fix L7812 ic load time functionality inactivity while device connected on running mode ?
Query1:
=====
I used 12v*2 3000mA with 2 diodes 5408 and 2200uf/35v . Which other capacitor value need to use in the output section of L7812 ic ?
Query2:
=======
My 12v*2 3000mA transformer where i connected 2200uf and 2 diodes 5408 and out shows 16.68 v.
Then i added L7812 and voltage shows 12v with heatsink .
But while i charged a lead acid battery then ic gone over heat and this continuty i cheaked got result 16.68v .
Then i stoped the charging and refresh .
Again on the switch and voltage shows 12v .
That neans heating the ic automatically ic is gone inactive .
In this time if i used any device by this power supply due to over vault connected device will be damaged automatically.
How can i keep my circuit safe while the output turn 16.68v to 12v while L7812 is inactive due to overheat ?
I suggest put a bigger heat sink and put also an additional fan so that the temperature will normalize and I asure you that the IC will run in normal condition. Thank you
@@JaviersDIY in the output section of L7812 which value of capacitor need to use that supports connected any 12v devices any "watt" value and never will be inactive ?
( L7812,2200uf,2 diodes 5408)