Good to Know / Achieve Many Different Voltages Using 7805 and Zener
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- Опубликовано: 30 сен 2024
- Good to Know / Achieve Many Different Voltages Using 7805 and Zener
Hello, in these videos, I wanted to show you how to make a very stable working voltage regulator using a 7805 voltage regulator and a zener. thanks for watching
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#zaferyildiz
#diy
#electronics
#zener
#lm7805 
Наука
I don't recommend using a zener diode unless it is a 5.1 or 5.6 volt zener. Using other zener voltages will make the output voltage drift over temperature. Instead, I recommend connecting a 470 ohm resistor between pins 2 and 3, then connecting a 2.5k pot between pin 2 and ground. This modification will give you a 5 to 30 volt variable output that is temperature compensated.
Of course, the LM317 is made especially for this purpose. Connect a 240 ohm resistor between pins 2 and 3, and a 5k pot from pin 2 to ground will give you a variable power supply with an output from 1.2 to 26 volts.
With both these circuits, the regulator heat dissipation gets quite high when you are running, say a 5 volt output with a 30 volt input, you will need a substantial heatsink and output current will be limited to about 250 mA.
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How to obtain an output voltage of 12V, 5V and 3V from a 54.6V bicycle battery? I need bicycle lighting, draw a simple diagram. thanks for the answers
I completely agree with you. If such an option, as the author shows, had no defects, then the chip developers would have put such an option in the data sheet. It's just fun. In modern electronics it is difficult to make something new; this requires new materials, but unfortunately they do not exist yet.
Eklenen bu zener ile max kaç amper alabiliriz ısınma durumu nedir ve voltaj sürekli stabil midir bilgi verirmisiniz.
zenerer akım ile ilgili degildir sadece 7805 in çıkışını degiştirir çıkış akımı 7805 ile sınırlıdır buda 1.5 A ancak çıkışı bir transistör ile artırabilirsiniz
ترجمة نص باستخدام الكاميرا
Selamun Aleykum Zafer lütfen elektronik parça satışı için iyi bir site istiyorum
Eline saglik ustam projelerin çok güzel olmua
çok teşekkür ederim kardeşim yorum ve destegin için
Hello. Is this for DC voltage or can you give it AC voltage and get the same constant voltage???
DC
Also you can get lower than 5v by adding 1n4007 in series with the output pin3. With every diode, voltage is reduced by 0.7 v. In some circuits, both series and pin 2 diodes are used to reduce and increase voltage simultaneously to isolate 7805 from reverse voltage damage
👉💕👈
Make a video with variable zener TL431 and 7805
Yes, that's a good idea. This could be the subject of another video.
Hi👋🤠; I never thought of using the common pin for anything but "Common Negative" Since the 1980s, I just learned something NEW! 🤔🧐😉... Now, if you just add a power Transistor as an "Emmiter Follower" Stage, you can "Sink" Any Amperage you want! 🤔💡😉👍👍👍👍👍
o.O i did know the usage from 1984 :) (japanese common sense it is :)
Thanks for the comments and support.
🤔🤔🤔🤔🤔🤔🤔😀😀😀💯💯💯💯💯💯💯💯💯✔✔✔✔👍👍👍👍👍👍. BUENA IDEA. GRACIAS.
thx my friend
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kanal çok dilli kardeşim yaklaşık 38 fatklı dilde açıklama mevcut
Well done, very good, so you lose the short circuit protection!
I don't follow you anymore, you're too childish!
The internal current sense resistor would still have the same voltage drop across it despite the external components being added, allowing the internal circuitry to function normally. I can go on to quote the product manufacturer specification sheet where it states “In addition to use as fixed voltage regulators, these devices can be used with external components to obtain adjustable output voltages and currents.” But I think that you already knew that and were just testing the master.
It's your decision to follow or not.
How many AMPS? Spec says up to 1.5A So doubling it would give you 3 Amps?
In a perfect world, yes, parallel connection will double the current. But in the REAL world, don't do it. Each IC is different (only a little bit different), with e. g. output voltage difference, they will interfere, push current to the other one etc. Eventually, the current will not double, but burning one of them is likely.
no output 1.5 A add transistor to increase output
@@ZAFERYILDIZ52 maybe a good video to create 😉
If you use your intuitive zener method, does it also increase the maximum input voltage for the 7805 device? It would for the input/ground section because the zener presents a lower voltage on the ground, but I am curious about the maximum allowed voltage difference between the input and the output terminals.
There will be a difference of 1.2 volts
Zafer ты очень крутой электронщик👍Я бы не додумался стабилитрон добавить😂 твоё решение очень круто💯
Спасибо за комментарий и поддержку.
Cái quan trọng nữa là mạch này được bao nhiêu a chứ dòng yếu thì làm chơi vây
Khuếch đại đầu ra với bóng bán dẫn lên tới công suất 7805
Which soldering iron you use?
FNIRSI HS-02
Can you add TL431
Это уже это уже каждый школьник знает
не все из них
Спасибо. Даже не представлял себе, что вопрос так просто решается. Вот уж действительно, век живи - век учись.
Спасибо за ваш комментарий и поддержку.
Great idea !👍. Now gettting zeners, 😊. Thanks,🍀☀️
Thank you for your comment and support, I'm glad you liked the project.
Очень полезная информация. Спасибо!
Спасибо за вашу приятную поддержку и комментарий.
teşekkür ler
Ben teşekkür ederim kardeşim
Adding decoupling capacitors is recommended. Without the 3 pin regulations oscillate easy. Keep the difference between in and output voltage as low as possible to limit the heat dissipation.
Where should the caps be connected? Approximate capacity?
Connect 1 uF between pins 1 and 2 (Input) and 3 and 2 (output). Extra 100 nF between output and ground. 100 uF over the zener diode might also keep the 78xx still. This last cap Will cause the output to raise from the regulator voltage to the output voltage after switching on. Beware of that.
Wow, that's amazing! Your inspired me that what voltage of the unknown zener diode is🙏
Muy Obvio!! jejeje
Thank you for your comment and support.
Quisiera saber como aumentar el amperaje de la salida de un lm7812
agregar un transistor a la salida
With 7805, 555, lm317, lm358, lm386, 2sc3055 is possible trip to Moon 😅
De Acuerdo, aunque No con lo de la Luna!! jejeje
@@fenixalorca3143 Eron Musk with engine AC, PWM circuit will go a Mars eheheheheheh
👌
في وقتها شكرا
Very nice👍👍👍👍 video thank you
thx my friend
فيديو قصير +معلومة حلوة=ابدااع❤❤❤
👍👍👍👍
شكرا لك على التعليق والدعم.
Teşekkürler.
ben teşekkr ederim
very useful circuit
thx my friend
¡¡ G R A C I A S !! ✨
👉💕👈
请帮忙给个材料清单
?
🤗👍👌⭐💯
thx my friend
@@ZAFERYILDIZ52 You are welcome 🤗
Helloo❤❤❤
thx my friend