You are very organized. Makes the explanation of the circuit very clear, very visible. One of the best Electronics channels I've ever seen on KZfaq. And the best ????? Without those horrible songs that take the focus away from the explanation. Very good ! Congratulations !!! 👏👏👏 (from Brazil)
@TechStudyCell11 ай бұрын
Thank you for the feedback... we will correct it
@democracyforall3 ай бұрын
@@TechStudyCell you should have explained the rest of the circuit as well how you got the 450 micro farad and the first resistor and the other...
@alfredcalleja4504 жыл бұрын
Thank you for being so clear in your instructions: I really appreciate the time and effort you put into this tutorial. Thanks from Australia.
@TechStudyCell4 жыл бұрын
Welcome... But don't use this circuit for variable DC load.
@hadypranoto23293 жыл бұрын
@@TechStudyCell what mean.. what kind dc variable load?
@slimeedude Жыл бұрын
bro my 100 ohm resistor died 💀
@emiliorodriguez6438 Жыл бұрын
@@slimeedude LMAO
@souravbhattacharyya33927 ай бұрын
@@slimeedudethis is a fuse resistor meant to blow off in case of overload and hence project the main unit
@dushanshachithra58943 жыл бұрын
Your teaching style is beautiful. Thank you.🙏❤
@gopin4714 жыл бұрын
Thank you very much for this clear video, Now I understood how my home rechargeable torch light works. I am becoming fan of you. :)
@RaghavanRaghunathan Жыл бұрын
Great! Good explanation about how to select the polyester capacitor based on the required output voltage. Thanks for sharing.
@anikettripathi79912 жыл бұрын
Consumers friendly technological designing are always different from business friendly. So many extra components and complicated designing are good for business.
@vishwanathballurgi44434 жыл бұрын
This is the only video as to how to choose correct particular based on physics calculation.
@nocomment484711 ай бұрын
Sir gi your explain is very Quite Amazing
@sunilsheth826 Жыл бұрын
Thank you for a very good explanation
@rsubram243 ай бұрын
The AC and DC capacitor name are not clear. Please write with voltage limits.
@shekavadh15684 жыл бұрын
you have forgotten to add a series resistance with zener diode (current limiting resistance )
@amitsolanki23214 жыл бұрын
I need 2amp current which resistane (ohm) i use?
@chandhrenb3353 жыл бұрын
@@amitsolanki2321 I guess increase in capacitors in parallel will increase the current
@anilpilla76263 жыл бұрын
The videos was very good and informative, you calculation and description of the components are good. If you can explain the about resistors and their values that would be great.
@jboy4real3 жыл бұрын
How did you calculate the value of the bleeder resistor and the 100ohm/2watt resistor in series with the neutral and the value of the smoothing capacitor
@mariafincham58475 жыл бұрын
Simple, Salvy. An L7806 is more costly than a zener
@bmh40132 жыл бұрын
super bro thank you very much
@ilhemedu314 ай бұрын
dangerous . solution was practical when transformers were expensive and big. Now phone chargers are available everywhere.
@ljubomirculibrk40973 жыл бұрын
For those that as of Amp rating, this is in the area of 10 to 50mA, depending of the input cap A 470nF X2 cap gives some 10mA This is not isolated power suplly, it has potential to ground or null in the range of 220V, it can shock or kill if you make a contact whit it
@aliyychannel47644 ай бұрын
Very cool project...but I really dont know what the function of R3?
@vijaymathkari42082 жыл бұрын
Want to try making it
@badrinath60593 жыл бұрын
Bro excellent project. I have been requesting you to provide complete project kits (sale) those who wants build the same..
@prachethire8123 ай бұрын
thank you, can we power a microcontroller using this supply
@trevor18ut2 жыл бұрын
Hi, A good effort of details in your video. It does not show the AC voltage before the bridge and DC voltage after the bridge prior to filter.
@TheControlPhilosopher4 жыл бұрын
This ckt.will certainly give a shock! 100mA output is very high. Actually such high currents should never be drawn from non-isolated sources. Fortunately Triac gating circuts that need 5 voIts on the input side will work very well even at 10 mA! So will be much safer to reduce current! Another trick to make it safer will be to have another capacitor with bleed resistor on the 2nd instead of the 100 ohm resistor! This way both wires on AC side of rectifier will become safe to touch.
@rajeshkumrpshah4 жыл бұрын
Sir, R1 &R2 are 270 k but in video u r telling 220 which is right? U r using one 2w resistance but in in details u have written 1 w what is correct ? Pl explain regards nice tuitor
@celtichongy5 жыл бұрын
Explained nice and clearly. Good job.
@TechStudyCell5 жыл бұрын
Thanks for the feedback...
@liamgomes65025 жыл бұрын
Excellent explanation
@electronic79795 жыл бұрын
Useful video 👍 very good
@TechStudyCell5 жыл бұрын
Thanks...
@RicoPrasetyo-vq5cw3 ай бұрын
can you explain, how you get the value of r1 ,r2, and r3
@Radhasony4726khan2 ай бұрын
How can change DC polarity for Motor reverse Forward?
@aliyychannel47643 ай бұрын
How much maximum current allowed for averall the power supply circuit when we connect to any larger load?instead only LED...how to estimate it?
@jamesallen60073 жыл бұрын
Many thanks.🇬🇧😷👍
@jamesallen60072 жыл бұрын
Why do you use a 2 Watt resistor, when you only need 0.1A at output?
@mdalibmaris51754 жыл бұрын
In your calculation, your AC capacitor value to be used is 1uf....but practically you are using the capacitor marked 155 J the value 1.5uf. I think you should be using 105 (1uf) to be exact instead of 155 (1.5uf). I wonder if there are changes in the output voltage at point A if the capacitance of the AC capacitor are changed. Please clarify.
@rahulwaghmare6370 Жыл бұрын
His schematic n pcb is diffrent
@NgocDangDinh3 жыл бұрын
Thank you very much for your video, can I have a question on avoiding of shocking on touching the output: 1. Can we you a phase cut at 5 VAC wave from using Zero cross protection stuff like MOC3021 and a small micro controller, triag to handle the trigger for wave form cut so that the overall voltage will never bee too high? 2. Of course with this, the synchronous wave form will be cut and have some time no power, can we use capacitor/ inductor to supplement the loss of power during the cut of AC wave form?
@TechStudyCell3 жыл бұрын
This power supply is only for small constant DC load. I will suggest you to use SMPS power supply.
@anshtiwari39942 жыл бұрын
how can i get 1 amp output current cz i wanna glow 40 rgb leds connected in a parallel
@divikumar54755 жыл бұрын
Explained pretty smooth and crystal clear. My question is, what will be the voltage after the 470micro f capacitor (C2)?
@javiercavo15 жыл бұрын
I think it depends of the frecuency, because the voltage in that point depend of the percentage of charge in C1...
@malcolmhodgson75404 жыл бұрын
5.1v as clamped by the Zener
@richardwright24612 ай бұрын
What determined the value of C2 and R3?
@krishanubiswas91572 жыл бұрын
Good. But the circuit is shock hazard at dc point which is very dengerus..
@user-ql3li6dg3c23 күн бұрын
hey dude does bleeding resitor require any calculations ?
@redelectron85752 жыл бұрын
I made it.Awesome Project.Whats the difference between tramsfomerless and transformer powersupply?
@Sandhu19772 жыл бұрын
Sir plz help transformer less 12v supply my filter capacitor is heatup what reason
@murugan.cmurugan.c37094 жыл бұрын
Great job I require that C2 ( capacitor value ) Please calculate method & including all formula.. I am waiting
@jayarajjayarajua43392 жыл бұрын
Well explained but text appearing on the video blocks the ckt and components.let the text scroll at the bottom of the video please. B lore.
@MdshahalammijiShahalam8 ай бұрын
can we measure the output voltage of transformarless powersupply wihout connected to the load?
@anikettripathi799111 ай бұрын
All led drivers can have transformerless power supply, but why we don't.
@ABZTRONICTUTORIALTo4 жыл бұрын
Remove the load n check the output still high voltages only the current very small it will not give any lower voltages except the zener
@AllAroundUs999 Жыл бұрын
Hi, can you please tell me what the R3 does, couldn't you connect it directly to the full bridge rectifier and ignore adding it? If you or someone else can shed some light on my question I would be forever grateful.
@ishaservices2 жыл бұрын
Sir good morning, no Gerber file in description ?
@inothome4 жыл бұрын
Good description of a capacitive dropper but too many annoying pop-ups to subscribe, share and comment.
@manassehabraham55893 жыл бұрын
I'm not getting the correct voltage for my 12v .... It's only giving .2v
@kingkonghill88942 жыл бұрын
How to determine the resistor which is connected parallel with this 1uF capacitor??
@karthieswaran9502 жыл бұрын
could you please make a video same for 24dc 10 amps to 12v dc 5amps
@avadhootmandhare43834 жыл бұрын
Kindly suggest component values to get 48v dc output from 230v ac by using above method.
@GurinderSingh2 жыл бұрын
Witch capastor use for 12 volt
@andreastriwinarto4422 Жыл бұрын
How if i need 24 volt dc?.. could you give the values of all the component?
@mibrahim42453 жыл бұрын
btw, the impedance seen by the source is the parallel network of the capacitor and the resistor ..
@100810810829 күн бұрын
Web site is not clear to order
@omaral-gallab4886 Жыл бұрын
Please, how much value for bleeder resistance
@tasmedic4 жыл бұрын
Not sure how you're reaching the figure of 6v across the input to the bridge rectifier. You're dealing with AC up to the point of the bridge rectifier, so your 6v would rectify to root 2 times that, minus 2x the forward voltage of the diodes you're using in the bridge. That's 8.4v minus 1.2v = 7.2v. dc output of the bridge. This would hammer your zener diode, (which should also have a series resistance to protect it?) I can't see how you can try to use DC voltages on the AC side of the rectifier. It just doesn't make sense to me.
@freedomisfood69662 жыл бұрын
thanks.but i test many times but never cant do this.i use 1 m ohms and 750 nf.i dont want a specefic voltage ,i just want to test but never succeed.i make circuit on bridboard bread board. 😭😭😭😭
@biplabhazra22863 жыл бұрын
If I want 5V, 2 A current DC output without any transformer (with 2 DC capacitor and Inductor) what will be the circuit diagram?
@Babbu6969 Жыл бұрын
For 150volt dc pls let me know the value of component
@themechatronicsguy97272 жыл бұрын
Can I use only a resistor to imitate the value of the Impedance? like a resistor with impedance 3192.6?
@EVIndonesia3 жыл бұрын
well done, i have a question regarding the zener, does the zener has current limit?
@neon-pl3du5 жыл бұрын
explain really well, is it possible to power this circuit without a load ? In the video you use a motor as a load.
@chennairobotist Жыл бұрын
These capacitor output is not safe, if the input voltage raises to a high voltage, the capacitor might blast. This happened to me twice.
@debojitacharjee5 жыл бұрын
why 100 ohm resistor is used at the AC input and how to determine the filter capcitor uF and voltage rating for the rectifier circuit?
@steveron63082 жыл бұрын
Sir from where you got the printed pcb , I need some pcb
@UjjualK10 ай бұрын
Can you please send me the pcb board link
@souravbhattacharyya33922 жыл бұрын
Please show the calculation for choosing the correct capacitance and voltage value of the filter capacitor .
@vernonbosshard93179 ай бұрын
formula for that is C = I / 2 x f x Vpp, where I is the load current, f is the AC frequency (usually 50 Hz or 60 Hz, and Vpp is the allowable ripple. Choose a cap 50 volts or higher, not critical.
@jumbo999614 Жыл бұрын
Do you have circuit in PDF or JPEG format? I want to make pcb at home instead of ordering on online store. In my country, it's expensive.
@parapos3 жыл бұрын
great instructions, but your formula C= 1/ 2x3.14 x50 x3192.6 = 9.975 (not 0.97). still about 1uF but not accurate or i am still missing something???
@DrPPrabu3 жыл бұрын
Respected Sir If i need 12v output , it is enough to do change the capacitance value.. help me
@shwilost48503 жыл бұрын
how to have 2 A in this design?
@narendrakhona11683 жыл бұрын
WOULD GREATLY APPRECIATE IF YOU. COULD MAKE A VIDEO OF LED EMERGENCY LIGHT SIMILAR TO " DP LED " SERIES 'EMERGENCY UNITS THAT ARE AVAILABLE IN MARKETS.
@chotabheemfulepisode92023 жыл бұрын
Sir ye 4v batry charger bana sakty hy
@sultanmulyono47812 жыл бұрын
How many ampere at 5v sir thank's.
@landroveraddict24573 жыл бұрын
Hi thank you for your video and the time you took in making it. Is it possible to use this type of circuit to drop ac to a lower ac voltage. I have two 220v 30w LED flood lights. I want to reduce the voltage to about 200v for maximum led life. The LED are very bright and I think are being over driven. The units are sealed so I can not get inside them to lower the DC voltage. Is my only option to install a mains dimmer switch? Help, advise please.
@sametkarakoyunlu88354 жыл бұрын
Hi, why are you use ac capasitör is 1.5 uf ? You calculate approximative 1 uf.
@pitikaron3 жыл бұрын
Where did you get (2x3•14)x50x3912.6
@sekharhembram66953 жыл бұрын
How much is the self consumption of power
@babysharmila1244 Жыл бұрын
I want pcb board with components another one 12v pcb board with component.
@bhaktirohira6014 Жыл бұрын
Can i use capacitor of 2.2 micro farad instead of 1.4 micro farad?
@ViniciusCZanini3 жыл бұрын
Thank you for this video. Is R3 really important? Why?
@vernonbosshard93179 ай бұрын
I don't get why you use P-P instead of RMS.
@nandikoyalkar50793 жыл бұрын
What is the value of bleader resistor
@mitchelletzkin13214 жыл бұрын
Where can i go to catch up and learn what each one of these devices does?
@100810810818 күн бұрын
Where to purchase biard
@shvideo14 жыл бұрын
You had a bunch of different loads in your circuit. Can you please tell us how they are connected to the output? Excellent video, thank you.
@TechStudyCell4 жыл бұрын
Some small DC load connected in parallel with the output of the circuit
@shvideo14 жыл бұрын
It is a great project, the indicator LED, the motor etc. Thank you for sharing, really enjoyed it. Keep inventing!
@ganeshmondal88884 жыл бұрын
Nice
@TechStudyCell4 жыл бұрын
Thanks
@ganeshmondal88884 жыл бұрын
@@TechStudyCell thumara o PCB bord kitna rupay liya . tumara pas ha ? To ham khaird kar langa 1pc .
@josepeixoto33844 жыл бұрын
what happens if and when C1 shorts out? 220 thru everything?
@robinhood24554 жыл бұрын
This is not the right way....You did not consider the 100 ohm resistor
@raisawate28125 жыл бұрын
Why you have used that 2w resistance and how you calculated the resistance value
@vikasdalvi52093 жыл бұрын
Hello Sir, Can I able used this circuit for the load of 5V , 500mA...?
@dharani3122 жыл бұрын
No
@gencbirmuhendis1859 ай бұрын
About 100 mA?@@dharani312
@javiercavo15 жыл бұрын
Hi! the voltage at point B is much lower than the voltage at point A because the capacitor C1 has no time to completely charge?? If Im right, is not this ciruit dangerous? because if the capacitor breaks, the voltage in the output is too big... (Im not sure if the zener can keep it low)
@ABZTRONICTUTORIALTo4 жыл бұрын
The output still almost 200volt with out a zener
@Aathif_Rahman_M2 жыл бұрын
Can you pls snd gerber file and circuit diagram
@headway193 жыл бұрын
What is the value of DC capacitor you have used
@LearnBe42 жыл бұрын
Can we use this for esp32?
@charmindesai37302 жыл бұрын
Why is the output voltage more..... 5.45V when a 5.1V zener diode is used
@gregjones36602 жыл бұрын
Because high voltage across zener. Like if you apply zero increasing to 10 volts across a regular .7v diode. Out of circuit the diode measures maybe .54V then with power supply connected positive to anode and negative to cathode. Then increase the power supply from 0 to 10V and the diode goes to more than 1V unless the power supply is weak and cuts out decreasing voltage. Also diode can cook the work bench...
@manjunathcv91463 жыл бұрын
What is shipping cost of pcb shipping to india?
@coresoftandroid28012 жыл бұрын
Eski life kitni hogi agar ese regular supply (24x7 h) ke liye use kare