Welcome to Skinny R & D. We are a community-based enterprise that provides custom engineering solutions, tailored technical instruction, and educational resources for techs. We also like to have fun while doing it.
The other 555 timers make one or two good points before they lose me, so I watch many to figure this chip out. Skinny's video is the most understandable out there, step by step I learned more from his than any other. Keep up the good work!
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.
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?
"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.
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
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
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.
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!
