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11 ай бұрын
Пікірлер
@mmasud2612 3 күн бұрын
Ok
@مهدیطااوی 9 күн бұрын
❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤ok
@snowstorm20 13 күн бұрын
Great, well done I am proud to be one of your students
@madmad8527 14 күн бұрын
سپاس❤❤❤❤❤
@mrr882008 14 күн бұрын
May God bless you❤❤❤❤❤
@RezaNazari-u8v 17 күн бұрын
Ok
@alirezajavadi772 17 күн бұрын
Exellent
@Ryuuken24 21 күн бұрын
It's a pwm circuit using flip flop circuit. The frequency is high, causing transformer ringing, 50 to 60 hz is not enough to drive this circuit, just tried it.
@مهدیطااوی 24 күн бұрын
❤ok❤ok❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤ok ❤
@vahidzarei6205 25 күн бұрын
ای جانم
@amireshghi65 25 күн бұрын
Hi Very nice
@EM1EH 26 күн бұрын
Thank you very much. If possible, explain about Crystals as oscillators and the possibility of using them in MOSFET circuits🙏🏻
@saeidmoghadam7517 29 күн бұрын
ماشالا به شما استاد خوشحالمون کردید با نبوغ که لبریزی 😂😂🎉🎉
@dradevill8367 Ай бұрын
Doroud Ostaad.. ❤ Mesle Hamishe Binazir Boodid. Ba Sepaase Faraavaan. ⭐⭐⭐⭐⭐
@deejayobenn160 Ай бұрын
Does bjt current ratings determine how strong it is to switch high gate Qg
@mahanmahjjob Ай бұрын
The best engineer
@Electronic4U-david Ай бұрын
Thank you very much. ❤️
@RasoulJafari-l2h Ай бұрын
سلام، اون ولتاژهای افقی و عمودی تیونر، برا چی هستن؟ خیلی ممنون می شم اگه راهنمایی فرمایید، با تشکر
@t1d100 Ай бұрын
You might consider doing a video on the difference between the lowest dropout voltage of a linear regulator and the voltage headroom that is required to attain the greatest/best ripple rejection. Hobbyist tend to only add the 1-1.5V required to prevent dropout. However, for the best ripple rejection, you must add 3V. The data sheets obscure this detail.
@Electronic4U-david Ай бұрын
I will try to do it in the next videos. thank you
@MohammadZahiri-je1qb Ай бұрын
Very good❤
@Electronic4U-david Ай бұрын
Thanks 😄
@iblesbosuok Ай бұрын
Distortion effect generator. A popular and favorite of many guitar players.
@Electronic4U-david Ай бұрын
Absolutely correct, thank you
@davehudl3593 Ай бұрын
The 78/79 series regulators need a capacitor across the output to stop the regulator from oscillating. The speaker needs a 100+ uF capacitor in series with it to block any DC component from burning out the 8 ohm speaker coil, although the 4558 probably isn't powerful enough to do that. If your output is going onwards into other equipment, maybe use a switching regulator (78S40 - others are svailable) in an inverting configuration to derive your negative supply and keep the opamp's virtual ground at 0v instead of 12v.
@Electronic4U-david Ай бұрын
Thank you very much for the useful information. My purpose of this video was not to build and operate the circuit. I just wanted to show that the negative voltage is nothing but changing the reference
@davehudl3593 Ай бұрын
@@Electronic4U-david Fair enough.
@bazrazin1 Ай бұрын
the new reference ground can't be combined with the whole system ground, will result in shorting the regulator o/p, stand alone use is ok, better use a center tap dual rail transformer & avoid complications.
@Electronic4U-david Ай бұрын
thank you very much It is absolutely true. I hope to use your valuable information again.
@ovalwingnut Ай бұрын
I did not know this (once again:). This is going straight onto my resume. Thank you
@Electronic4U-david Ай бұрын
Thank you for your support🙂
@Spark-Hole Ай бұрын
Do you really mean I need no LM7912 but I can make from LM7812 ?
@Electronic4U-david Ай бұрын
It is better to first create a negative voltage with the help of a diode and then stabilize the voltage using a 7912 regulator. This video is just a way to show the change of reference point.
@robinsonsoto8471 Ай бұрын
You are applying 24 v to the LM4558. From ground to pin 8. You are making any negative voltage from a positive reg. You are builing an amplifier using LM4558. Where is the neg voltage?
@Electronic4U-david Ай бұрын
In fact, there is no negative voltage. I only changed the reference to show that there is no such thing as a negative voltage at all. The output of the regulator is a reference or ground. To activate the op-amp, the voltage of the power supply is entered, but for other parts, I use the virtual ground as the ground. Because we have changed the reference, the reference used with the multimeter is the same as the output of the regulator.
@mahanmahjjob Ай бұрын
Good job❤❤❤❤❤❤❤❤❤
@Electronic4U-david Ай бұрын
Thank you for your constant support
@Mariooooo Ай бұрын
In general the Input voltage for the LM series ist not twice the output voltage! The input voltage required to maintain line regulation for a LM7805 is 7,5V and for a LM7812 is 14.6V! Super safe operation is given at Vi = Vo + 3V! You are right, if you need a Voltage symetrical powersupply, then Vi = Vo x 2, but it is not current symetrical, therefore do not use such a low cost crap for Audio applications 😅.
@Electronic4U-david Ай бұрын
Thank you for your good information. I said in the video that only 2 volts more is enough for the regulator. In this video, I tried to show that negative voltage does not actually exist and only the reference determines the type of voltage. Increasing the voltage of the power source up to 24 volts was only to obtain symmetrical voltage and it is not necessary to use it. thank you very much
@moritzalshuth7239 Ай бұрын
-12V is unregulated. Better use 7824, put 2x 100k in series across and attach a 3rd (power-)opamp to junction with unity gain. Use output as GND.
@Electronic4U-david Ай бұрын
Thank you for your great information. It is absolutely true. I learn from you. I hope to benefit from your information again.
@luconovo Ай бұрын
Ciao potreste progettare dei sistemi/circuiti elettronici facendo dei tutorial e postandoli su YoCiao potreste progettare dei sistemi/circuiti elettronici facendo dei tutorial e postandoli su KZbin mettendo passo passo i componenti sulla protoboard e basetta spiegano contemporaneamente il funzionamento del circuito in modo che possa riproporlo a casa? grazie Luca uTube mettendo passo passo i componenti sulla protoboard e basetta spiegano contemporaneamente il funzionamento del circuito in modo che possa riproporlo a casa? grazie Luca
@Electronic4U-david Ай бұрын
I hope to produce more videos in the future. Thank you for your support, Luca
@luconovo Ай бұрын
@@Electronic4U-david thanks write me ok? Thanks
@pooyankardooni8600 Ай бұрын
tnx
@Electronic4U-david Ай бұрын
Thank you for your support
@pooyankardooni8600 Ай бұрын
👌
@Electronic4U-david Ай бұрын
Thank you for your support🙂
@philbrooke-little7082 Ай бұрын
It's a useful combination for detecting when there is current flowing in either direction in a charging circuit. An example could be in a battery backed supply when current has to flow both ways but you need to detect if the charger fails t deliver current at very low float levels and you can detect it from the diode volt drop.
@Electronic4U-david Ай бұрын
Thank you for your valuable information
@trollobite1629 Ай бұрын
Simple. It's to make schematics difficult to read 😅
@Electronic4U-david Ай бұрын
right😂
@Kourosh-q6i Ай бұрын
Good
@Electronic4U-david Ай бұрын
Thanks
@jensschroder8214 Ай бұрын
- To set up a plus and minus power supply you need ONE transformer WINDING WITH CENTER TAP, one bridge rectifier and a 7805 and 7905, add the capacitors. - Or you have TWO SEPARATE transformer WINDINGS then you can set up two rectifier stages, each with a 7805, add the capacitors. But the first proposal requires fewer components and is cheaper.
@Electronic4U-david Ай бұрын
It is absolutely true. I did not mean to use this voltage. I just wanted to show that the negative voltage is nothing but the normal voltage that we have changed the reference. Thank you anyway
@viktorgorbunov Ай бұрын
Use it as RF mixer. Wide dynamic range, half-freq heterodyne with no emission to antenna, low noise and distortions, simplicity. Usable for DSB, SSB, AM (with limitations).
@Electronic4U-david Ай бұрын
Thank you very much for the valuable information you shared. I hope to benefit from your comments again.
@SirvanOffice Ай бұрын
thankyou very good
@Electronic4U-david Ай бұрын
Thank you very much
@4k60hz6 Ай бұрын
I doubt that this can appropriately be applied when the resistance in the positive side is higher that the negative side. If the resistance on the positive side (between +V and OUT) is lesser than the negative side (bet OUT and -V), a negative current will flow in the output pin of the regulator. Is the regulator capable of handling this? I didn't see in the datasheet a negative output current capability of the 7812 regulator.
@t1d100 Ай бұрын
I, too, am wondering about this application. As you give an electrical reasoning for question its viability, my thinking was more basic... If this works (well and appropriately,) it seems to me that there would be no need for the LM79xx series of negative regulators. The economics would dictate buying more LM78xx series, in order to gain a quantity discount on the parts order. The economic benefit would extend further, to the regulator's supporting caps, because the LM79xx negative regulators use slightly different supporting caps, than the LM78xx positive regulator series. I also wonder about the current output. Wouldn't the single regulator continue to supply only its rated current? Say 1.5A. And, wouldn't that fixed amount of current have to be shared between the positive voltage and negative voltage usages? The author does prove the concept with his multimeter, but I am still wondering about the idea...
@Electronic4U-david Ай бұрын
It is absolutely true. This regulator ran well up to 1 amp in my test without any interference. But my purpose of this video was not to use this voltage along with high current. I just want to show that the negative voltage is nothing but the positive voltage that we have changed the reference.
@Electronic4U-david Ай бұрын
The problem is that in order to use this voltage, there must be great accuracy in the power source and if the current is higher, it will have problems in negative and positive. Of course, as I said, I had no intention of using this voltage at all, and the sample circuit was only for demonstration use, not for long-term use A
@t1d100 Ай бұрын
Your replies are correct. As a proof of concept, it does work. Thanks for your replies.
@xl1803 Ай бұрын
🎉🎉make more videos on led bulb problems
@Electronic4U-david Ай бұрын
I try to make better videos
@xl1803 Ай бұрын
🎉🎉
@Electronic4U-david Ай бұрын
Thank you very much
@xl1803 Ай бұрын
🎉🎉
@Electronic4U-david Ай бұрын
🙂
@alirezabaniasad530 Ай бұрын
Great teacher, great teaching 🙏🙏🙏
@Electronic4U-david Ай бұрын
Thank you very much for your support😍
@mhmdsh6796 Ай бұрын
Sepas. اگرزمینه زیرنویس تاریک باشد بهتره. هردوکانالتون را تماشا میکنیم. wery good
@arnavpawar256 Ай бұрын
Can you please make a video on generating a 27Mhz CB band carrier frequency 😀 I really want to make a long range radio communication project but the currently available modules have really low range. It would be nice if you make a video on this topic , so I could use something like ASK protocol for digital data 😀 thanks in advance...
@Electronic4U-david Ай бұрын
Thank you for your support. I will try to make better videos in the future, thank you again
@GAMENIX1 Ай бұрын
Put the working IC 7812 in water, can it work?
@dd07871 Ай бұрын
Yes, it will generate electricity on its own if you put it in warm salt water. Salt from West Africa works best.
@Stampe-OZ0AS Ай бұрын
@@dd07871 😆😆
@Electronic4U-david Ай бұрын
🙂
@Electronic4U-david Ай бұрын
😍
@GAMENIX1 Ай бұрын
@@dd07871 I did not mean salt water, it was ordinary water
@JimmyDanieley Ай бұрын
Yes sir 👏 🙌
@Electronic4U-david Ай бұрын
Thank you very much for your support
@Electronic4U-david Ай бұрын
I have put the circuit schematic at the end of the video Schematic download link: drive.google.com/file/d/1GG9v6lXCie8ltZPbxuQpvIyqqVn_JtHV/view?usp=sharing
@bazrazin1 Ай бұрын
but the shape of the sine wave changes to kind of square wave.
@Electronic4U-david Ай бұрын
I deliberately increased the voltage to show on the multimeter. Often the input of this circuit is not high. Therefore, limiting the signal correctly occurs.
@kresoptube Ай бұрын
You set 5V on generator and diodes basicaly shorted it. Is this common feature of signal generators not to burn when shorted?
@Electronic4U-david Ай бұрын
No, they will not burn. I also used a digital generator. This cutting circuit is widely used in most frequency and audio circuits.
@anythingyouwanttvmr.anonym959 Ай бұрын
That circuit I see inside the analog multimeter And PI. Pulse induction metal detector.
@Electronic4U-david Ай бұрын
thank you It is absolutely true