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Thank you , thank you Frequency vs PWM has been killing me , thank uou

Thank you sir!!

The capacitors will never be reverse charged more than a few tenths of a Volt. Hook up a multimeter and check it for yourself. If they were to be reverse charged to 8 Volts, they would probably be destroyed and possibly explode if they are electrolytics.

Awesome explanation ❤

Is there a way to use this method if you want to connect a phone device to a computer to upload or download the data files where it depends on a landline dialup but you don't have a POTS landline? How would you get the 2 sides to handshake if you don't use a telephone number or a dial out/answer procedure?

for your LED "ringer", you could use an optocoupler and some arduinos or PIC chips to do some fun things. I like a good analog solution better, tho.

"Dial tones" are not the tones you get when you push a button on the phone. You mean "touch tones" or DTMF. A dial tone is only provided by the phone company or a special system.

This is a great video. Really good explanation. TY.

Seems to me that you could turn off the TCP/IP stack with a card in promiscuous mode. Been a whiles since I had to use something like this. Will probably need to turn off any file sharing types services that might create UDP port announcement messaging.

Thank you for your video , it’s all about those brushless dc motors, and controlling those ESC with a variable duty cycle , I’ll get it with your help , thanks agsim

what is the value of the diode? can i use in4007?

Thank you sir :)

Thank you, you are a great teacher, I appreciate the visualizations. Not many can teach technical IT topics, always find the older videos being the best

i would recccomend with usb nics that are replacable

This video is obviously old, but it was exactly what I'd be searching for. You saved my a lot of money and time. Thumbs up!

Hi good video presentation. I want to learn how to trigger a 555 timer in monostable mode with an opto sw. Suggestions?

ImMoreInterestedHowToChangeFrequencyAndDutyCicleToRemain50Percent.

How long can you make this with a 9 V?

It's really a nice piece of smart work and also very well explained. Thanks a lot.

NoOneKnowsHowToUse555TimerWithAMosfet🤦🏻‍♀️🤦🏻‍♀️

thanks this was concise , simple and easy to understand as an intro to 386 amp chips is invaluable for me embarking on a new path at 66 years old.

Amazing video even today. Thank you so much for your help!

I needed a 1uF capacitor bridging CVV to GND to prevent overshooting at the start of the cycle. With a 12V input, max voltage was 20V.

Other than the isolating aspect of isolated gate drivers, is there any advantage in using a gate driver between a MOSFET and a 555?

thank you

Great, simple, stable, and effective circuit.... 👌

Thank you. I'm surprised I understand the part of the video explaining the constants 0.693 and .05 is because of the 3V and 6 V concept. I'm really weak with algebraic manipulation. I have to use examples (like you showed) and then write simple spreadsheets to do my math.

found using 280K Rb gave 2 seconds Thanks for the video

Would you please explain in brief about pin 5 of the ne555 timer ic and how it works on a circuit.

Would you please explain in brief about pin 5 of the ne555 timer ic.

Would you please explain in brief about pin 5 of the ne555 timer ic.

Can you make a detailed video on how you can, adjusting frequency without changing the duty cycle in astable mode with ne555

My circuit is doing the opposite why. It lights before I switch and when switch it goes off for some time and it comes back on again.

Good video , I am a beginner if you can what capacitor value did you use. Anyway thanks for the videos.

Need not forget the counter EMF flyback diode in parallel with the motor.

11:54 I was saying to myself, "that scope should be able to display the duty cycle". Then he enabled it. 🙂

Cheers mate. This is a great explanation. Very helpful.

Tried on Grandstream not working could you help

How do you calculate the resistance if frequency capacitance are given

Absolutely awsome sir,thanku😊

Amazing video and such a clear explanation.

thanks

Exellent😊

In engineering, they teach that if you wait five time constants (5RC) the capacitor is charged "all the way" or "it's safe now", etc. Something like you are saying at about timestamp 7:00 I work with high-energy electronics, and had to learn for myself that this cam be an assumption that will KILL YOU!! I realize that this will not be usually encountered in 555 circuits, but be sure you are aware of this on large scales, such as the big "pulse" and "energy" caps. If you wait 5RC, then the cap is discharged down to 1-exp(-t/RC) or 1-e^(-5), which is over 99% discharged. Now consider the huge capacitors that so many people are using for such things as "wire exploding", "rail guns", "can-crushing", etc. I have seen some cap banks that are charged to energy levels like 75kJ. If such a bank is discharged 99.3% (5RC) it is left with an instantly lethal 525 Joules!! I believe that these things are the most dangerous electrical components! BTW: at about timestamp 4:00 I think there is a mistake in the datasheet in the last formula visible...isn't the duty cycle given by "D=(Ra+Rb)/(Ra+2Rb)" THANKS MUCH FOR THE VIDEO!

Hi, is it possible to use 2 voip CISCO CP-7821 as an intercom without a telephone line?

One switch on off electronic

I dont understand negative voltage

This guy is so cool, i hope he's doing well in 2023

If you made r2 an adjustable resistor as well, would that allow you to then adjust the frequency as well? Seperate from the duty cycle?

By far, the best, and I mean the best explanation yet