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Are these prone to getting hot and needing a heat sink? Please make a video only of electrical components that get hot and produce heat needing heatsinks and cooling... Mosfets, transistors, resistors ect
It is exactly what I need. Many beginners video explained the electronics part and circuit separately. Usually only the electronic part and number calculation, but not the Circuit. And then suddenly showing the Circuit as it ever been explained in the videos. This video is a big help, I love it!
At the two minute mark why is a resistor required in the circuit. If the input to the diode is 5 V, then why not just connect the diode directly to the output of the voltage regulator?
Can you tell the value or specification of the NTC? I search online store and says something like 5D- 15 , 10D-25, etc. So I don't know which one to pick.
In a simple circuit with a battery+ resistor+led,the led acts as a resistor and + the first resistor,it becomes a voltage divider,right?! So in that circuit the current is the same as the battery,only the voltage drops,right?! Is my understanding correct?
No, there are many things incorrect in your understanding. -A resistor is used in series with LED to limit the current flowing through the LED. LEDs cannot handle lot of current and they will fry if the current is not limited. -Remember V=IR. This means if the voltage drops, and the resistor does not change, then the current has to drop. So this resistor not only drops the voltage but limits the current, which is its main purpose. -An LED does not act as a resistor. In some cases it is used as a diode but don't worry about it for now. -A voltage divider is a bit different than anything shown in this video, and I suggest you understand voltage, current & resistors before learning about voltage divider, it will make it easier.
Zeners can't replace even simplest voltage regulators. Their breakdown voltage is unpredictable, they are drifting with temperature, their current is typically low.
There's a huge problem in your timer example. Whenever the diac triggers the triac, current starts flowing from capacitor to the load (not from the ac source) as at that time the ac source is at zero point. Pin my comment.
