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

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Foolish Engineer

Foolish Engineer

Күн бұрын

Пікірлер: 63
@atexnik
@atexnik 3 жыл бұрын
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
@FoolishEngineer 3 жыл бұрын
very clear observation! I need to think on that.
@salocin9695
@salocin9695 2 жыл бұрын
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
@kennmossman8701 Жыл бұрын
basically that is true in any circuit
@SONNGUYENTHAI-qj8hg
@SONNGUYENTHAI-qj8hg Ай бұрын
great video ! You helped me a lot ! tyms
@adolfschultz6362
@adolfschultz6362 3 жыл бұрын
Great job!
@FoolishEngineer
@FoolishEngineer 3 жыл бұрын
Thank you so much, Glad you liked it!!
@johndczerwinski
@johndczerwinski 2 жыл бұрын
how do you calculate for the size of the capacitors?
@kennmossman8701
@kennmossman8701 Жыл бұрын
rule of thumb for Cin is 1000uF per Amp though some say 2000uF per Amp depends on the load
@davidjackson2115
@davidjackson2115 4 ай бұрын
@@kennmossman8701 what about C out and yr talking amps on load I assume. Lots of caps for 40 amps to regulate 14.4 volts for my project. Otherwise its arduino.
@kennmossman8701
@kennmossman8701 4 ай бұрын
@@davidjackson2115 49A ???? thats a very different beast
@ReNoirIN
@ReNoirIN 3 жыл бұрын
Thank You My Indian Brother! 👋
@FoolishEngineer
@FoolishEngineer 3 жыл бұрын
Thank you so much, Glad you liked it!!
@deastech1176
@deastech1176 Жыл бұрын
Excellent Explanation, Good Animation , Simplicity
@FoolishEngineer
@FoolishEngineer Жыл бұрын
Glad it was helpful!
@paneerpolice3454
@paneerpolice3454 3 жыл бұрын
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
@kennmossman8701 Жыл бұрын
what? use a boost/buck converter
@davidjackson2115
@davidjackson2115 4 ай бұрын
I agree. need this circuit for lead acid batteries & solar. Sick of blowing things you cant fix or dont do what you want voltage wise. Im talking 40 amps & deep cycle on solar.
@tosc4goro711
@tosc4goro711 Жыл бұрын
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
@tosc4goro711 Жыл бұрын
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?
@elektronikhobim6903
@elektronikhobim6903 2 жыл бұрын
Simulation and explanation thanks
@FoolishEngineer
@FoolishEngineer 2 жыл бұрын
Thank you so much! Please show support to my video with Super thanks.
@mrcleanisin
@mrcleanisin 14 күн бұрын
Should design for 12 volt LiFeP04 on moped.
@darshanjoshi5224
@darshanjoshi5224 2 жыл бұрын
Can you also explain the same, if we replace zener with TL431 for precise tegulation?
@FoolishEngineer
@FoolishEngineer 2 жыл бұрын
Yes, we can do that!
@kennmossman8701
@kennmossman8701 Жыл бұрын
trouble is the low current capability
@tronetrickard7130
@tronetrickard7130 8 ай бұрын
Fan regulator what is out put voltage in lowest knob
@aspect_xhimself8028
@aspect_xhimself8028 Жыл бұрын
Well, seems the engineer's not so foolish after all...
@amused_harry
@amused_harry 2 жыл бұрын
Damn, that is some good explaining
@Ratkill
@Ratkill 3 жыл бұрын
How does this man this compare to the Linear Regulator in terms of noise and PSRR?
@FoolishEngineer
@FoolishEngineer 3 жыл бұрын
This regulator is very helpful for such application where input voltage ripple is very low & voltage range is also low.
@aazimdeen8440
@aazimdeen8440 Жыл бұрын
Can i use n channel mosfet instead of bjt
@pierrejonsichon1482
@pierrejonsichon1482 Жыл бұрын
Yes you can do that! normally, this has more advantage than the bjt. because bjt has more temperature dependency and values will vary.
@choonkwangyeo925
@choonkwangyeo925 3 жыл бұрын
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
@ChristianWilliams-cq7st 2 жыл бұрын
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
@elektronikhobim6903 2 жыл бұрын
Good question
@elektronikhobim6903
@elektronikhobim6903 2 жыл бұрын
Good answer
@sudhansumtripathy
@sudhansumtripathy 9 ай бұрын
why is the emitter is connected to the +ve in the output end as we not it should be always reverse biased.
@UnknownPerson-nl7te
@UnknownPerson-nl7te 2 жыл бұрын
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
@kennmossman8701 Жыл бұрын
well there is an argument for a lower Cout but not for that reason
@kyleshim361
@kyleshim361 3 жыл бұрын
excellent explanation about series regulation. thank you.
@FoolishEngineer
@FoolishEngineer 3 жыл бұрын
Thank you so much for watching!! Please don't forget to subscribe to our channel
@power_electronics.TECH.V
@power_electronics.TECH.V Жыл бұрын
How can you change ac voltage from a motor to DC to charge a phone
@kennmossman8701
@kennmossman8701 Жыл бұрын
yes
@beku2283
@beku2283 8 ай бұрын
At least transistors generally dissipate heat better then the diodes, more surface area, like to TO-3 type.
@dvgelectrician1605
@dvgelectrician1605 3 жыл бұрын
Super
@FoolishEngineer
@FoolishEngineer 3 жыл бұрын
Thank you so much for watching!! Please subscribe to our channel
@bartonstano9327
@bartonstano9327 2 жыл бұрын
Thanks for video.
@roarproductionsstudio
@roarproductionsstudio 2 жыл бұрын
"Small ball of guts" what does it mean.
@habtamusium8646
@habtamusium8646 Жыл бұрын
thanks ! I got important role of Z-diode .
@ovankhoa732
@ovankhoa732 Жыл бұрын
Great !
@smartandsimple6678
@smartandsimple6678 3 жыл бұрын
👍🏻👍🏻👍🏻
@FoolishEngineer
@FoolishEngineer 3 жыл бұрын
Thank you so much for watching!! Please subscribe to our channel & share it to your friends also
@dellodel9502
@dellodel9502 2 жыл бұрын
The problem is the voltage drop in load at some amount of current
@kennmossman8701
@kennmossman8701 Жыл бұрын
same is true in 'amy' regulator
@laxsundar
@laxsundar 2 жыл бұрын
😍🙏 नमस्कार
@StrivingLesClos
@StrivingLesClos 2 жыл бұрын
the background music is quite distracting esp when listening through headphones
@FoolishEngineer
@FoolishEngineer 2 жыл бұрын
Sorry for the inconvenience
@intelmind
@intelmind Жыл бұрын
can you please controlle 100 volt to 30volt
@shuvendupattari8079
@shuvendupattari8079 2 жыл бұрын
🔥
@deneemcharly6781
@deneemcharly6781 2 жыл бұрын
First u study English
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