Thank you for the video. In the example in my opinion is important also to observe that the transistor, in the worst case, have to absorb (and dissipate) 8W
Professor, you said that the maximum wattage that the R sub s resistor would see is .977 watts so you chose a 1 watt resistor. I was taught that choosing a resistor wattage at least 1 & 1/2 times the expected wattage is good practice in design. I would spec out a 2 watt resistor for this. Am I wrong?
does this design allows vcc to vary like has using in a surge protector to detect high and low voltage .by the used of a capacitor dropper circuit for setup down AC current ,
i use a 5.1 Zenner in series with 22 ohms and RL 50 ohms this power a 555 timer 3 led and a comparator the to total current coming in is about 140-170 mA i the issue i have having is that resistor is operating about 70 its power rating so a bit of heating up is their any way to fix and still have the circuit the same way
Given that most real components specify their maximum wattage rating in the presence of crazy heat sinking and airflow, I'd recommend mentioning to students that they derate their components by a half if trying any experiments based on these calculations, unless they've also done a bunch of thermal transfer calculations.
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Thank you for the video.
In the example in my opinion is important also to observe that the transistor, in the worst case, have to absorb (and dissipate) 8W
First video lecture of 2024! Happy new year
Happy new year prof. Always great to see these videos. It brings back memories. Take care and stay healthy as always.
You explain very well:) Thank you
Awesome, Happy New Year !.......cheers.
Thank you!🌟
Professor, could you create a series of videos covering RF, comparators, ADCs, DACs, mixers, and related topics
Professor, you said that the maximum wattage that the R sub s resistor would see is .977 watts so you chose a 1 watt resistor. I was taught that choosing a resistor wattage at least 1 & 1/2 times the expected wattage is good practice in design. I would spec out a 2 watt resistor for this. Am I wrong?
does this design allows vcc to vary like has using in a surge protector to detect high and low voltage .by the used of a capacitor dropper circuit for setup down AC current ,
i use a 5.1 Zenner in series with 22 ohms and RL 50 ohms this power a 555 timer 3 led and a comparator the to total current coming in is about 140-170 mA i the issue i have having is that resistor is operating about 70 its power rating so a bit of heating up is their any way to fix and still have the circuit the same way
Given that most real components specify their maximum wattage rating in the presence of crazy heat sinking and airflow, I'd recommend mentioning to students that they derate their components by a half if trying any experiments based on these calculations, unless they've also done a bunch of thermal transfer calculations.
Why didn't you calculate Rs value when Vin=18V