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Voltage Regulators: What else can they do? 

Electronic Wizard
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In this video, we dive deep into the world of DC-to-DC voltage regulators, essential components in electronic circuits that ensure stable and reliable power supply.
thanks to PCBWay.com for sponsoring this video
pcbway.com/g/tNX66A
Here is the link for the PCBWay 10th anniversary
www.pcbway.com/activity/anniv...
Whether you're working on a microcontroller-based project, powering various sensors, or dealing with noisy motors, understanding voltage regulators is crucial. We'll explore various applications, including providing operating voltages for different components, creating unusual voltages for specific devices, and filtering noise to protect sensitive electronics. We'll also discuss how to use regulators for sensor validation, reference voltages, and transistor biasing, ensuring your circuits function accurately and reliably. Join us as we unlock the secrets of voltage regulators and learn how to enhance the performance and stability of your electronic projects. Don't forget to like, subscribe, and hit the bell icon for more insightful videos!
also, in this video, you will get answers for the following questions.
What is a voltage regulator, and how does it work?
What should I do if I need an unusual voltage for my project?
How can voltage regulators help in reducing noise in my circuits?
Why is it important to separate the power supplies for motors and microcontrollers?
How can I use voltage regulators to ensure accurate sensor readings in my circuits?
What role do voltage regulators play in providing a stable reference voltage for ADCs?
How can voltage regulators be used to bias transistors in amplifier circuits?
What are some practical applications of voltage regulators in electronic projects?
How can voltage regulators improve the reliability and performance of my electronic circuits?
Why should I consider using a voltage regulator instead of directly using a battery voltage?
How do voltage regulators protect sensitive electronic components from voltage fluctuations?

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5 авг 2024

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Комментарии : 92   
@ALEFILES
@ALEFILES 24 дня назад
In some cases our designs failures because an unexpected enemy, the noise. Thanks to this wonderful video I've discovered that a regulator is not only useful to adapt voltage, they are effective noise blocker too! My like is the #217... Thanks a lot for another interesting video! Greetings from Argentina!
@elewizard
@elewizard 24 дня назад
Yeah, regulators are a powerful tool for noise reduction. You rock my Argentinian friend. ❤️
@brianwood5220
@brianwood5220 7 дней назад
Thanks for all the educational content you pass on to people. I'm learning every time I watch your content.
@elewizard
@elewizard 4 дня назад
Glad to hear it. It is my pleasure. By the way, your £5 Super Thanks rocks! Thanks a ton!
@a.sanaie2460
@a.sanaie2460 24 дня назад
Thanks for this video. As always your videos are direct to the point and practical 😊
@elewizard
@elewizard 24 дня назад
You rock. Thank you for supporting me ❤️
@anvarkurbanov951
@anvarkurbanov951 25 дней назад
Thanks much! Always looking forward to your new staff.
@anvarkurbanov951
@anvarkurbanov951 25 дней назад
..stuff
@elewizard
@elewizard 25 дней назад
Awesome, thanks for your attention ❤️
@MlokKarel
@MlokKarel 23 дня назад
Keep it coming! You have one of the highest useful-information density videos out there! 😊
@elewizard
@elewizard 23 дня назад
Wow, awesome. Thank you for supporting me ❤️❤️❤️😃
@4bSix86f61
@4bSix86f61 25 дней назад
Or just put a 100nF MLCC across the motor and a 5v TVS diode on the supply. A another approach is to power the MCU through a 100ohm resistor and have a capaictor on both sides. Most MCUs run on 3v3 so 1 regulator should be enough.
@elewizard
@elewizard 25 дней назад
Yes, putting 104 cap may decrease the noise, but in some cases, it is not enough 👍
@jbflores01
@jbflores01 17 дней назад
Great well explained video….as always!
@elewizard
@elewizard 16 дней назад
Awesome, thanks again 😊
@slikati
@slikati 25 дней назад
The video was really good and the explanation was great.
@elewizard
@elewizard 25 дней назад
Awesome, thanks for watching 🥂
@JoeMcLutz
@JoeMcLutz 24 дня назад
So interesting... Thanks alot! 👍🏻
@elewizard
@elewizard 24 дня назад
Keep watching 🥂
@ChrisHalden007
@ChrisHalden007 18 дней назад
Very useful. Thanks
@elewizard
@elewizard 18 дней назад
Welcome 👍
@killerboy4261
@killerboy4261 25 дней назад
good explanation as always :)
@elewizard
@elewizard 25 дней назад
Thanks so much my friend
@msg1956
@msg1956 14 дней назад
Excellent..!
@elewizard
@elewizard 14 дней назад
Many thanks!
@meysamhemmatinasab3328
@meysamhemmatinasab3328 21 день назад
Thanks, buddy. I always learn a lot of useful and practical tips from your videos. Interestingly, a few days ago, I was watching a video where someone removed the voltage regulator from a microcontroller to reduce noise! But you said the opposite, which makes sense. If possible, could you make a video about methods for hardening and increasing the stability of microcontrollers in tough circuits and conditions? I know you're an expert on microcontrollers.
@elewizard
@elewizard 18 дней назад
Thank you meysam for your great suggestion. It will be a good subject for a video 👍
@Bianchi77
@Bianchi77 12 дней назад
Nice video, thanks :)
@elewizard
@elewizard 11 дней назад
Thank you ✌
@alfredsamperi9776
@alfredsamperi9776 24 дня назад
Thanks
@elewizard
@elewizard 24 дня назад
Thank you for the awesome A$14.99 Super Thanks! 🌟
@blackcathardware6238
@blackcathardware6238 7 дней назад
I once heard of a guy who used some 7805 to convert digital 12V signals on his car to 5V for further processing with an AVR.
@elewizard
@elewizard 4 дня назад
Maybe it work, but there is an easier solution for that. You can use just two resistors as voltage divider network
@blackcathardware6238
@blackcathardware6238 4 дня назад
@@elewizard Which is a very stupid idea in a CAR!
@petersdelucaaa2vg306
@petersdelucaaa2vg306 23 дня назад
As one who is learning electronics your videos are very educational and well presented. Are you able to speak about DC-DC converters when you need to increase the voltage to a steady level above the battery voltage to run, for example, a portable morse code transceiver. How can I produce 13.8 volts from two lithium AA batteries that are 3.7 volts each. Thanks.
@elewizard
@elewizard 21 день назад
Glad the videos were helpful. By the way, subject of my next video is exactly that. In the next video, I will explain how we can use an inductor to convert 1V to -80V
@persiangulf2282
@persiangulf2282 22 дня назад
ایول داداش باعث افتخاری مخصوصا با لحجه صحیح ام انگلیسی صحبت میکنی ،ایولا دمت گرم
@elewizard
@elewizard 21 день назад
Thank you bro for supporting me 😎
@peterlethbridge7859
@peterlethbridge7859 24 дня назад
Thank you. Yet another brilliantly explained video. Please keep then coming.
@elewizard
@elewizard 24 дня назад
Thanks, will do! ❤️❤️❤️
@MrCuddlyable
@MrCuddlyable 2 часа назад
14:31 The regulator gives a stable voltage to the transistor base BUT the collector current is horribly temperature dependent!
@jp040759
@jp040759 24 дня назад
Great vid. Audio was a little low this time. THANX.
@elewizard
@elewizard 24 дня назад
Sorry about that. I am trying to improve the visual and audible quality.
@jp040759
@jp040759 23 дня назад
@@elewizard No apology required. Just letting you know it has been right on it other vids. Carry On sir.
@LukmanSantoso13
@LukmanSantoso13 19 дней назад
You can use the lm317 to make steady current source,
@elewizard
@elewizard 18 дней назад
Yeah. Exactly. Thank you for mentioning this point
@KarldorisLambley
@KarldorisLambley 24 дня назад
i cant believe you missed out my fave use. for limiting current to sensitive components. i use lm338 all the time, with just output shorted to adjust with a 1 ohm R, then drive things from adjust lead. so it limits current to 1.25A for laser diodes.
@elewizard
@elewizard 21 день назад
Yes, I missed that 🫠
@shlomsi2000
@shlomsi2000 24 дня назад
Thanks for the video. I would add an important application - content-current source, either 78xx or lm317 etc, can be used as a constant current to drive an LED for example.
@elewizard
@elewizard 24 дня назад
Awesome, thanks for mentioning that 👍
@JohnHansknecht
@JohnHansknecht 11 дней назад
Yes, but if you pulse the circuit to flash the led, you will kill the led because the 78xx takes a few usec to get into regulation.
@raymitchell9736
@raymitchell9736 4 дня назад
What are your thoughts?? I have an application of using an Arduino 5V to control a Halloween prop that uses a 5V motor @ 600mA to drive a skeleton jaw (The output is PWM and my electronics switch more than fast enough to work this motor). The Motor is used to open the jaw and there is a spring to return the jaw closed. To protect the Arduino, I opto-isolated the output pin, then I used a MOSFET to drive the current required. I put a reversed 1N4007 diode across the motor to protect against back EMF as well as the motor itself has a small disk capacitor (unknown size, it was part of the older prop electronics). The 5V supply that I am using is a high current (about 1.5A) switch-mode module that converts my input voltage of 12VDC down to 5VDC common grounds. With these precautions taken, is that sufficient, or would you still recommend a separate supply for the motor? I will probably be testing the electronics today, I will scope the power supply to see how badly the noise is when the Jaw is in operation.
@user-hq3lc3mm6z
@user-hq3lc3mm6z 25 дней назад
If we use a voltage regulator on portable devices will it reduce the battery life ?, because the power loss across the regulators are high ?
@elewizard
@elewizard 25 дней назад
It depends on many factors. But generally NO, it shouldn't be harmful for the battery 🔋
@Dont_Gnaw_on_the_Kitty_1
@Dont_Gnaw_on_the_Kitty_1 24 дня назад
​@@elewizardMaybe not 'harmful' to a battery but the regulator dissipates heat which is flattening the battery for no benefit. Best to use a dc to do converter.
@MlokKarel
@MlokKarel 23 дня назад
Not shorten the battery life per se, but definitely discharge the battery much much faster. Like order of magnitude faster. I have used two 18650 in series along with LM7806 instead of four D-type cells and the time between recharges was like two days. So I've decided to redo it, this time using two 18650 in parallel with a SX1308 boost converter, set at 6.2V - there's your first advantage, ability to fine-tune the voltage (easily) . But the other big advantage, the quiescent current is well under 1mA, compared to 5-8 mA of the LM7806. So far it's working for two weeks without recharge.
@williamdetempolivre
@williamdetempolivre 10 дней назад
​​@@MlokKarel In my limited knowledge, what could be done to reduce unnecessary power loss is using a switching regulator instead of a linear regulator, since one can be more efficient than the other with the drawback of more noise.
@koskos758
@koskos758 22 дня назад
Another one: source of constant current instead of voltage.
@AdamV20
@AdamV20 22 дня назад
I was hoping he would mention this
@elewizard
@elewizard 21 день назад
I missed that🫠 In an updated video, I'll add more usages including current limiter 👍
@tedbastwock3810
@tedbastwock3810 22 дня назад
For the MCU, NPN transistor, motor circuit shown around 6:07 are you saying that the inductive noise from the motor will pass from the collector-emitter channel through the base back to the MCU? I admit I am a newbie learning, but I didn't realize this was possible. Regardless, thank you for this video, its very helpful for learning. I knew I needed to suppress EMF noise from my dc motor, and now I might experiment with using both capacitors and voltage regulators. I really like your channel, and appreciate the time you put into it, I think this channel will grow very much. Thank you.
@CircuitDuty101
@CircuitDuty101 21 день назад
I think he was saying the motor would "pollute" the 5v rail with electrical noise. And as this rail is common to both the motor and the MCU, then this could cause a latch-up. Depending on component types, and ratings/values, some interference may also travel back through the BJT, therefore a filtering cap on the base would be helpful.
@tedbastwock3810
@tedbastwock3810 21 день назад
@@CircuitDuty101 Thank you, much appreciated. That makes sense to me. Especially in light of the next two circuits he shows at 8:35, where the power rail is 12v and the MCU and/or motor have voltage regulators on their high side. Could be that was part of the point he was making and I missed it. Thanks again.
@Jenny_Digital
@Jenny_Digital 24 дня назад
What about abusing the humble 7805 as an amplifier. I know you can mess with the reference on to get odd voltages. I saw an amplifier built using 555 timers on Hackaday once too.
@elewizard
@elewizard 24 дня назад
Yeah, 7805 is really a humble component. It's my childhood friend 😃
@ChandrashekarCN
@ChandrashekarCN 25 дней назад
💖💖💖💖
@elewizard
@elewizard 25 дней назад
❤️❤️❤️❤️
@zorabixun
@zorabixun 25 дней назад
Is it possible for voltage regulator to increase the voltage over the battery voltage ? .. if we need 5v using battery 12v, VR can make 5v, but when battery goes down below 5v, it would be good to increase the voltage from dying battery for example 2v to 5v 😂
@Usefkol
@Usefkol 25 дней назад
With buck-boost regulators, we can increase and decrease the voltage
@elewizard
@elewizard 25 дней назад
Yes, boost regulators like xl6009 can easily increase voltage. By the way, in my next video, I'll teach you hot to make 80v from 0.5v
@BjornV78
@BjornV78 25 дней назад
3:47 a 7805 is NOT a fixed voltage regulator. In fact, you can use a 7805 and have a adjustable DC output voltage between 5 and 16,8V (with 20V input). For a output of 5 to 16,8V , you can do this by placing a fixed resistor of 270 Ohm and a potentiometer of 470 Ohm both in series between the common pin (middle pin) and ground/negative of the circuit. That way you have minimum 270 Ohm and maximum 740 Ohm between the common pin and ground. A 7805 can take up to 35V regarding the datasheet, but with above resistor values, the output doesn't go higher then 16,8V if you go above the 20V input. This type of adjustable powersupply was sold by Velleman a manufacturer of DIY Electronic kits in the 90's, kit partnumber P2570 or K2570.
@bazzaar1869
@bazzaar1869 25 дней назад
No, in the case you are talking about the design uses a fixed voltage regulator AS a variable voltage regulator. There is a difference. The manufacturers call a 7805 fixed voltage, the convention has been established that the last 2 digits represent the voltage the regulator is fixed at. So 7805 is 5V, 7812 is 12V, 7815 is 15V etc.. We could open the discussion further and say in fact there are NO 78XX fixed voltage regulators, they are ALL variable regulators! The one that people and manufacturers CALL variable voltage are in fact "fixed" at 1.2V common to output, and use the configuration you mention to "vary" the output over the range 1.2 to 35 volts. The point is, it is not of any use to state "a 7805 is NOT a fixed voltage regulator" when it is known as a fixed voltage regulator and the minimalist component circuit results in a fixed voltage. Maybe you meant to say "Hey guys! you can use a fixed voltage regulator in a variable voltage circuit!" hmmm?
@BjornV78
@BjornV78 25 дней назад
@@bazzaar1869 hi, i'm just pointing out, that a 7805 can be used as a adjustable voltage regulator and the term "Fixed" is not completely true. Many people don't know this trick and always presume that a 78xx voltage regulator is a fixed voltage regulator , while it can also be used as a adjustable voltage regulator like a LM317. Grtz
@bazzaar1869
@bazzaar1869 25 дней назад
@@BjornV78 This was a widely known "trick" actually, due mostly to the manufacturers including this circuit in their device specification and application information.
@elewizard
@elewizard 25 дней назад
I can't agree with you, because the 7805 is actually a fixed voltage regulator, however it can be used as an adjustable voltage regulator👍
@Dont_Gnaw_on_the_Kitty_1
@Dont_Gnaw_on_the_Kitty_1 24 дня назад
​@@BjornV78That's a great use to use a 'fixed' regulator at a different voltage. The video doesn't show this trick.
@user-wo6qn3vf9n
@user-wo6qn3vf9n 23 дня назад
TPWS
@user-dy5ck9ri9o
@user-dy5ck9ri9o 19 дней назад
ماشالاه ایرانی باعث افتخاری فقط یه سوال اسپانسر شما به ایران هم ارسال داره و اینکه با صرفه هست سفارش بدیم برای برد پی سی بی
@elewizard
@elewizard 18 дней назад
Mamnoonam. Na alan dg be keshvar ma ersal nadarand
@user-xw4bt1lo1l
@user-xw4bt1lo1l 12 дней назад
TURKMUSUN LA ?
@elewizard
@elewizard 11 дней назад
Evet, benim Ana dilim azerbaijan turkçesi
@axaxaaxaxa6269
@axaxaaxaxa6269 24 дня назад
you are always spewing fake information. why?? because from tehran?
@elewizard
@elewizard 24 дня назад
Can you mention the false info I prevented?
@kouroshkhaleghi4678
@kouroshkhaleghi4678 24 дня назад
This guy doesn't know anything about electronics
@elewizard
@elewizard 24 дня назад
Thank you for expressing your opinion 🌷🌷
@hannibaltexter
@hannibaltexter 24 дня назад
@kouroshkhaleghi4678 can you detail where you found mistakes? For newer learners, this information seems very helpful.
@MlokKarel
@MlokKarel 23 дня назад
This guy is one of the few Elder Gods of electronics, on par with the likes of BigClive, DiodeGoneWild, Great Scott and such. In my humble opinion, of course 😉
@user-kw5qv6zl5e
@user-kw5qv6zl5e 23 дня назад
Yeah figured that... apart from the stuff he knows...which is a fair bit...
@TheBodgybrothers
@TheBodgybrothers 16 дней назад
​@@hannibaltexterregulators don't remove noise
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