Voltage Regulator using Transistor | Series Voltage Regulator | cheap Voltage Regulator

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#VoltageRegulator #BJT #Transistor
0:00 Index
00:43 required components
00:55 Zener regulator
01:07 Zener regulator basics
02:10 Disadvantages of Zener regulator
02:10 Low efficiency
02:40 Poor load regulation
03:06 series regulator circuit
03:20 Comparison of Series regulator & Zener regulator
03:34 working of the series regulator
03:56 series regulator design
07:25 simulation
07:58 Advantages
08:31 Disadvantages
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Опубликовано:

28 июн 2024

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Комментарии : 61

@adolfschultz6362 2 года назад

Great job!

@FoolishEngineer 2 года назад

Thank you so much, Glad you liked it!!

@atexnik 2 года назад

When you change the load resistor, for example to a lower value, the current increases, this means, the base-emitter current increases, which causes the Ir current to increase as well, which in its turn increases voltage drop over the resistor, which can be shift the zener diode into non stabilizing range. So, you should count for this min/max values as well. Can you describe how should you fully calculate this circuit?

@FoolishEngineer 2 года назад

very clear observation! I need to think on that.

@salocin9695 2 года назад

The voltage drop over the resistor and its current should first stay constant, with more current flowing to the base then to the Zener. But that then can, as you are correctly worried about, effect the Zener.

@kennmossman8701 9 месяцев назад

basically that is true in any circuit

@elektronikhobim6903 Год назад

Simulation and explanation thanks

@FoolishEngineer Год назад

Thank you so much! Please show support to my video with Super thanks.

@tronetrickard7130 2 месяца назад

Fan regulator what is out put voltage in lowest knob

@johndczerwinski 2 года назад

how do you calculate for the size of the capacitors?

@kennmossman8701 9 месяцев назад

rule of thumb for Cin is 1000uF per Amp though some say 2000uF per Amp depends on the load

@kyleshim361 2 года назад

excellent explanation about series regulation. thank you.

@FoolishEngineer 2 года назад

Thank you so much for watching!! Please don't forget to subscribe to our channel

@tosc4goro711 7 месяцев назад

excellent video sir! but i just want to know, don't we need to put a resistor in Ib to drop it from 6.8 to 0.7v? i am sorry if i am wrong

@tosc4goro711 7 месяцев назад

also for the power dissipation of the zener diode, u said before the zener diode safe operation is 10mA and 20mA is current that flowing the resistor, so should we multiple the Vd with 10 mA instead of 20mA?

@paneerpolice3454 2 года назад

12v voltage regulator with good efficiency which will not give up and i would be able to apply heatsink on it with good 2 Amp at 12v output with input varing from 12v to 15v?

@kennmossman8701 9 месяцев назад

what? use a boost/buck converter

@amused_harry 2 года назад

Damn, that is some good explaining

@darshanjoshi5224 Год назад

Can you also explain the same, if we replace zener with TL431 for precise tegulation?

@FoolishEngineer Год назад

Yes, we can do that!

@kennmossman8701 9 месяцев назад

trouble is the low current capability

@sudhansumtripathy 3 месяца назад

why is the emitter is connected to the +ve in the output end as we not it should be always reverse biased.

@ReNoirIN 3 года назад

Thank You My Indian Brother! 👋

@FoolishEngineer 3 года назад

Thank you so much, Glad you liked it!!

@Ratkill 2 года назад

How does this man this compare to the Linear Regulator in terms of noise and PSRR?

@FoolishEngineer 2 года назад

This regulator is very helpful for such application where input voltage ripple is very low & voltage range is also low.

@bartonstano9327 Год назад

Thanks for video.

@beku2283 2 месяца назад

At least transistors generally dissipate heat better then the diodes, more surface area, like to TO-3 type.

@aazimdeen8440 Год назад

Can i use n channel mosfet instead of bjt

@pierrejonsichon1482 10 месяцев назад

Yes you can do that! normally, this has more advantage than the bjt. because bjt has more temperature dependency and values will vary.

@smartandsimple6678 3 года назад

👍🏻👍🏻👍🏻

@FoolishEngineer 3 года назад

Thank you so much for watching!! Please subscribe to our channel & share it to your friends also

@dvgelectrician1605 3 года назад

Super

@FoolishEngineer 3 года назад

Thank you so much for watching!! Please subscribe to our channel

@power_electronics.TECH.V 10 месяцев назад

How can you change ac voltage from a motor to DC to charge a phone

@kennmossman8701 9 месяцев назад

yes

@aspect_xhimself8028 Год назад

Well, seems the engineer's not so foolish after all...

@ovankhoa732 11 месяцев назад

Great !

@habtamusium8646 Год назад

thanks ! I got important role of Z-diode .

@UnknownPerson-nl7te 2 года назад

I will recommend you to use lower capacity output capacitor like 200uf or something and use a load resistor in output with a value like 1 kOhm or 500 Ohms, or reducing voltage will be a trouble, don't be like you have to follow 100% Video, if you have knowledge, apply it or you'll never learn

@kennmossman8701 9 месяцев назад

well there is an argument for a lower Cout but not for that reason

@choonkwangyeo925 2 года назад

Why is the power dissipation of the transistor = (7.5-6) x 0.5? Can you explain where did the 0.5A comes from and why is the voltage across the transistor consider as Vout -Vin? In addition, why did you use 20mA instead of 10mA in the calculation for the zener and resistor power dissipation?

@ChristianWilliams-cq7st 2 года назад

The 0.5A current comes from the chosen load current, and since the emitter current is the sum of all currents passing through the transistor, it represents the total current that generates power through the transistor. The voltages across the collector and emitter are 7.5V and 6V respectively, so the voltage drop would be 7.5V-6V (according to Kirchhoff's Voltage Law). Plugging those values into the power equation, P=IV, we come to P= (7.5V-6V) * 0.5A. For the zener diode and resistor power dissipation calculations, the current used in calculations was 20mA for the resistor because we choose the resistor's value to force that current, so that is known by the design. For the zener diode, we use 20mA as a worse case where all the current is passed through the diode (for reliability purposes). In reality, 10mA of that current should be used to control the base of the transistor, but it is almost always better to use higher power-rated components in the event that the worse case scenario occurs.

@elektronikhobim6903 Год назад

Good question

@elektronikhobim6903 Год назад

Good answer