220v to 12v without transformer
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- čas přidán 21. 08. 2024
- Hello friends, today in this video I have shown how to make a 220v to 12v converter circuit. Please note, this circuit is not isolated from mains so don’t touch any naked wire in this circuit when the circuit is plugged in.
If you want to increase the brightness of the led use 10W led and 2.2uf ceramic capacitor in place of 1uf. This capacitor must be rated 400v or above.
Li-ion charger circuit using 1 transistor
• Simple li-ion 18650 ba...
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Thank you very much for watching - Věda a technologie
Li-ion charger circuit using 1 transistor
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Bhi es board sa kitna light ko jala paya ga???
ทำแบบนี้ได้พลังงานกี่ w ครับผม
can it also be used on the contrary?
@@pankajgaming723 no
WOW! I saw this circuit in a book from the late 60's. I used it to replace the light bulb in my parents' fridge 20-ish years ago. The "light bulb" was salvaged when the old fridge was discarded and now is installed in a night light lamp. No houses on fire until now...
Looks like I have stumbled upon an ancient knowledge... gotta have more..
@@leonelbarrientos995 xD
When using diodes with shorter than original lead length, you MUST reduce current rating of the diode, per Sylvania ECG Engineering staff. Solder should be applied to the joint, not put on the iron and transferred to the joint. That circuit should have a fuse in it also. Very dangerous construction to use it that way. We often use a capacitor of a certain size to reduce AC voltage input to antique radios that originally had resistance line cords.
Thanks for the video clip but if you had used a multimeter to show the output it would have been complete. Now, please tell me how much Amp current it will output?
Two bottom side diodes of the bridge should be 27 V /1.3 W zener. There must be a 100 Ohms 2 Watts resistor serie connected to 1uF capacitor. This capacitor should be rated to 400V AC at least and type X2 (ask your component dealer) Otherwise you get a very good explosion after a short while.
This circuit was used in the past even by Siemens for space constrainted applications. It is stil used by some Chinese and Indian manufacturers in cheap LED bulbs. Even there is an IC which utilizes this configuration. And yes, their lifetime is very short
I've been using simplified version as mains indicator. just with small red led (like 2 mA current) and although it's nice little circuit, with justified use in some cases, I wouldn't recommend it to people without experience. it's really dangerous, and you should know the necessary precautions to use it..
And should use one 12 volt 1 watt zenner diod parallel.
Not with the led they shouldn't. Any other circuit I would agree but definitely not with the led.
@@lazyh-online4839 Why we do not need it with the LED? How the O/P voltage is 12V now?
@@tubfragr2270 because led require a current controlled power supply, not a voltage controlled. The "resistance" of an LED is highly dependent upon temperature, the hotter it gets the less resistance it has which means more power flows through it which means it gets hotter which means it resists less, more power, hotter, resists less, more power, hotter, on and on. It's a runaway effect until the led blows up or dies, so controlling voltage doesn't do anything for an led, so a zener is pretty useless. Also a zener of that size wouldn't work for those power levels anyways.
A capacitor can only be charged up a certain amount for a given voltage, after that the capacitor is "full" so the cap can't pass more current than it can store for each cycle, this current limiting is how the led doesn't overheat like if it was getting constant voltage like a zener would do.
@@tubfragr2270 also, most leds like this have a 32v forward voltage, so a 12v zener wouldn't even be enough anyways.
@@lazyh-online4839 But what limits the current here then?
You are not informing with positive and negetive. I do and blast it💥💥
Nice,
But please make a video
How ceramic capacitor convert
220v -12v mechanism clearly
Третья рука креативная! Клево👍
The reason I placed a thumbs down is because this circuit will KILL. If you are silly enough to connect directly to mains, then use a total of 4 capacitors. Use 2* 4.7uf ceramic caps in series in each leg, so, if any one capacitor goes short, live mains is not connected directly to the LED's. use 2 * 4.7 uf in series in neutral leg, 2 in active leg, (capacitors value's halve when connected in series. total capacitance in circuit connected to mains is 4.7uf /4 = 1.75 uf. much safer. Also, FULLY ENCLOSE circuit in insulated box. LIVE circuits make DEAD men.
Many young radio amateurs who will try to repeat this electric circuit will be killed!)))
How do you think is it that Resistor was reducing 220v AC down to 12v AC or something else...???
No, this is a really poor idea and I would discourage anyone from attempting to build.
The output is dependant on the load - you have no way of regulating here, which is what you imply from the title! You also have a 25v electrolytic which would be stressed with that same over-voltage.
As you mention in the video, this circuit is dangerous as it is mains referenced - why on Earth (pun intended) would you not want a transformer? - they’re cheap enough... Even safe switched-mode supplies are cheap as chips now.
I don’t believe you really understand this circuit, which is why you don’t explain its operation and you shouldn’t show people how to play with fire
💡🔥⚡️🤡
I am sure he has NO IDEA what he is doing
@@kennmossman8701 It's actually a capacitive dropper circuit, although is dangerous but is cheap to build. The only problem that if there is no load, I would say it will explode the capacitor
@@justassimple8328 I counted THREE MAJOR MISTAKES and two less major mistakes. IT IS OBVIOUS TO ME THAT THIS GUY IS A CLOWN - JUST A TOTAL BOZO. PLUS!!! the construction is appallingly BAD!
Welcome to Tech Ideas where I have no f*cking idea what I am doing - follow me at your peril !
Butcher with no idea...
Though he didn't build it right, this is actually a very common power supply design, lots of cheaper electronic components like iot buttons and the like often use them because it's way cheaper than their a transformer or a smps. In a way the capacity of that first capacitor limits the current available based on the ac frequency and internal resistance, which is why an "unregulated" version like this actually works pretty well for high power led supplies. Besides that the main issue is chosing a properly rated capacitor (they're specially made for this kind of application, but still cheaper than anything else) and using zeners to regulate the voltage down.
Рассаду отлично досвечивает.
Конопли?
I thought it was a dangerous circuit.
If the LED is disconnected or misconnected, it will destroy the electrolytic capacitor
Yep, and with the led he doesn't even need the cap there in the first place since our eyes would filter out the majority of the flicker.
Sir, very nice. Sir, what is the value of resistor 100 ohms ? Watt how much.
Ten zasilacz daje prąd około 120mA, czyli około 10 razy mniejszy niż prąd nominalny diody LED. Moc to 1W zamiast 10W.
Liked it. An inexpensive, practical solution that could be used to power other low voltage projects too.
It's neither inexpensive nor practical, unless you're stealing your AC power and don't care how much power you waste. There is a reason that even the cheapest power adapter uses a transformer. Take a basic circuits 101 class if you're actually interested in learning something.
I wouldn't bet on it.
Диоды моста в опасности - нужно ограничить пусковой ток при включении с разряженными емкостями, включив на входе последовательно резистор
А как же развязка по U?
Нашел такую схему в "вентиляторе от розетки", причём продавался в США под видом made in us. Видимо тоже китай
Very good Many casual do circuit videos and handle ac current casual holding it.its a bad think.kids watch.they will be misguided.ur good in informing and putting a tester to show the live current.well done
Becarefull, this circuit does not step down the main 220V to 12V! It only holds the current.
Rafael Cabelo true
Superb DIY
Comment after making and using this kind.
Best 👍
Przy wewnętrznym zwarciu w kondensatorze 1uF, a także przy przepaleniu LED, wybuchnie kondensator 220uF, od zbyt wysokiego napięcia na jego końcówkach (powinien być na napięcie przynajmniej 400V). Zalecam szczególną ostrożność z tym wynalazkiem...
Your idea is good but no precautions &
1-what is the value of ac ceramic capacitor how much voltage for that
2-Resistance 1mega ohm how much watts
3 - what is the running current so that u can calculate voltage drop across resistance accordingly u will connect resistance to have 12 volts output
Google it "transformerless power supply" u can't take more than 100mA. It's completely failure. X rated capacitor blasting in 30 mins continuous run.
Ceramic 105 j or k 400-450 V, 1 Mega ohm 1/4 W, always connect phase with the open end of the ceramic to avoid electric shock at the output...use a 3 pin plug to ensure fixed live and neutral position,always use 12 V zener 1/2 W or 7812 voltage regulator IC(with heat sink)....put circuit inside a plastic or MDF board box securing it with double sided tape or hot glue.......I use such capacitor drop bleeder circuits regularly with absolutely no problem (apart from low output ampere) if you follow these safety measures.
@@souravbhattacharyya3392 ji thanks for reply, plz tell abt the formula, for calculations of this circuit, why u have taken 1Megaohm 1/4 w resistance? Why not with less value or more &why 1/4 w? Why not 1/2 or 1watts, resistance, similarly for 105j capacitor of 400-450volts why not some other value, with 250volts ,
@@RajKumar-ci7dg the ac supply sometimes goes above or around 240 V,so unsafe to use 250 V ceramic in case of an ac spike, if you use less than 1 mega ohm it may not be able to discharge the ceramic fully when circuit is off, you may use it for higher watt,but 1/4 W serves the purpose well....for further safety you may use a 100 ohm 2 watt fusible resistance at the input side....so far as the calculations are concerned we take help of Ohm's law which is not fully correct since each resistor has got its own self inductance value which is not easy to judge and hence to judge the impedance from R-L phasors,also the diodes being semiconductor devices donot exactly comply by Ohm's law.....use a 3 V LED with 1 K in series at the dc output as an indicator
@@souravbhattacharyya3392 ji thanks for reply voltage for ac supply is clear but how u calculated 105j for it ®arding resistance also not clear how u calculated the value as 1 Mega ohm, capacitor discharges as, soon as the resistance is low or no resistance in parallel, if u connect higher value resistance in parellel to it it takes time to discharge, moreover capacitor &resistance in parallel are coming in series with main supply so some voltage will drop across it depending upon the output load, that's why I requested u to plz tell abt the formula to calculate the value of resistance &capacitor bcz as the load increases or decreases some voltage will drop across capacitor &resistance, moreover how much max load can be connected across output, plz tell.
Por fin un video donde muestra paso a paso con las referencia y coneciones de los materiales felicitaciones...excelente
Gracias por sus vídeos nos ayudan mucho .quería regular la corriente de una moto que tira aprox 90 voltios en ca y quería bajarla a 12 o 14 voltios pero en cc para que el pito suene bien y no se dañe .le agradezco su gran ayuda .Tomás de costa rica
Very useful nice circuit . Thanks for presenting.
can i connect the 220v side to an air blower and the 12v side to motor battery
nice video sir
2:36 Цепь не изолирована от электросети, поэтому не прикасайтесь к цепи, когда она подключена (кто не знает это перевод на русский язык)
Причина: удар током. После удара тока умирает человек, поскольку 220 вольт и может быть опасно. Рекомендуем купить защитные средства от удара током.
Главное не Забывайте что это без трансформаторный бп и нету гальванической развязки ⚠️😊😉
what is Ampere Out ?
I now know how to make fire crackers with resistor 😂
I tried arc welding with this circuit thank God for gloves and good face protection.
Not the brightest move there buddy.
Yes, I use this chem too, and it may be works many years.
You are so amazing creator
Actually in that bridge rectifier you can use 25v 2200uf capacitor, it's best for that bridge rectifier.
Thanks for this tech idea bro👍
Led will not be work for long time without heat sink
I think people are missing the point, it was an experiment to show a wheat stone bridge being used to convert AC to DC and not use a Transformer.
Mantap bossqu.. 🤝🏼 👍 Sukses selalu
Very interesting thing, you are "capos" in electronic!!!!
good job. hello from Turkey.
Welcome bro
Merhaba 🙂
The Led Will Burn After Few Hours
Only without a heatsink, and only depending upon it's rated power output
The led is not the issue, like lazy said, it just needs a heatsink, but the circuit itself will fail because of the caps used
@@-na-nomad6247 thanks for elaborating on the capacitor issue, maybe I should be less "lazy" in my explanation 🤣
This.circuit will not last because the components heat up due to high current.
false ! you dont know capacitive power supply !
Components heats up in resistor based power supply nd not the capacitor one
will this resistor hold the current without burning ?
Yes, it's 1 Mega ohms
Not working . Only 7 Volts is coming
No voltage regulation circuit ?
You don't want voltage regulation with led.
It's a good project.
Thanking you for giving this idea.
This design Capacitor ac current too high
Require selected cap
Just so.
Don't try it!!!!!!!!!!!
Please bring an avo and put it across the the output
What's avo? I need this project the right way please
I see the comments below but I'm still going to try to work out why this circuit works to help understand EE. Sometimes simplified examples are the best.
Google transformerless power supply.
How to do the same with 100.w Led?
this is the indian way to start a fire😂😂😂😂😂
it is a capacitive power supply, and so wat ? there is the same in my coffee maker !!
@@tinlanthierry6650coffee machine has a constant resistance so capacitor can be calculated exactly. LED will thermally runaway and burn this crappy "design". Do you think that if that thkng would work, LED lamps manufacturers would bother to put a more complex design inside their light bulbs?
Goos concept but unstable, not effective and dangerous (cap failure)
If the 1uf capacitor shorts, the electrolitic capacitor and leds will explode like fireworks on the 4th July. It would be better to insert a fuse between the mains plug and the circuit.
Use zener diode or regulator for safety
Se puede usar un diodo zener de 12 voltios a la salida, para estabilizar el voltaje
Victor correcto, el voltage de salida es muy alto.
Yes,or a 7812 with heat sink
very useful circuit
Use a transformer to provide isolation and to increase energy efficiency.
Transformer wouldn't increase efficiency, it would decrease it.
Can you give me info on how to make with 120V AC? Thank you !!!
Use cap 2ucF.
@@Perepodvyvert_s_perevorotom - THANK YOU !!!
But 2ucF *ONLY* for the led shown in this video!
If you want to connect another load - use the online calculator for transformer-free (transformerless) power supply.
@@Perepodvyvert_s_perevorotom - Thank you !!! ❤️❤️❤️❤️❤️❤️❤️
No 1
please help me grow my channel
@@fransiistaken I support
Bahut achha hai sir
Nada mas un favor que se vean bien los valores de los elementos o circuitos que usas y gracias por compartir
GRACIAS FUNCIONA MUY BIEN UN FUERTE ABRAZO
Nice to see
Some of the nastiest soldering technique I've seen.
Keep in mind this is how electronics were manufactured for a long time!
Aaron Niehaus This is true, but PCBs, breadboards and breakout boards have been here quite a while ago.
Same circuits are used in cheap Home LED bulbs
yes i agree
i've dismantled one that we have,
it was the bulb that has a battery inside witch allows it to lit up in case of black out...
didnt last long 😞
so i tried to see whats inside and yes that circuit was the same...
Can I make this without diode rectifier ?
So I can make voltage doubler and get double voltage in dc
the rectifier is the the thing that turn ac to dc you can’t remove it
Very good idea.Thanks
For the love of god, can anybody make something without being criticized? Just trying to read some of your comments gave me autism..
"If we eliminate all errors, we would also eliminate much discovery, art, insight, learning, and creativity that results from facing errors."
-Kevin Everette FitzMaurice
sorry, I'm a beginner. I've tried this circuit but why is the 220uf 25 volt capacitor in just 3 seconds and it's very hot... and the DC output is electrocuted... is this circuit safe to use? Thank you in advance, best wishes for success, please guide me.
i was wondering if i be a good youtuber like u
You can always try!
@@JodBronson I do so please put your help by chucking my channel and subscribe
No, not without using capitals and proper punctuation...
"easy way to burn your house"
yes,i try this and the 220uf cap explode
🤣🤣🤣
please share the schematics , give a full detailed explanation about how it work
what a dangerous circuit , just any mistake and boom
Buen video ....una pregunta si el led fuera de 36 voltiis y 100 watts que tendria que cambiar de los componentes..gracias
Observação: neste circuito não ocorre o efeito de *isolamento* da rede elétrica como ocorre com o uso de transformadores.
Colombia presente.............
This huge capacitor tried to kill me last week. I tried that circuit. Dangerous.. Not recommend to anybody
How do I see you died?
Or are my eyes lying to me?
Just keep your hands away from the circuit under voltage.
It was trying only.
@@Perepodvyvert_s_perevorotom yeah i didn't touched the circuit under voltage but when i plugged the circuit off i got shocked by touching the AC input plug cause of charged capacitor. By the way i am alright 😊
@@sergiojuancha yeah that was nightmare too
Sorry!
Dear what is maximum current of this circuit and how many led can glow on this circuit?
It depends on the capacitance and frequency. From capacitance and frequency you calculate reactance. And Ohm's Law will then tell you the maximum power possible. 1 uF on a 220V 50 Hz mains system will give a reactance of 3183 ohm. And with 220V that limits the power to 69 mA.
Dislike it. Claiming 12v without using multimeter!
surely 12v LEDburst ,use 12v zener diode across the capacitor
Cómo puedo calcular el voltaje de Salida depende del capacitor cerámico o del condensador electrolítico.
What's the current that can carry this circuit?
Oh my god !
It is very dangerous ckt. It is not isolate between HOT and Cool circuit .
Hot and cool? Do you know how electricity works?
Wow nice to video
Please, for the love of god, don't do this at home. Especially with that plug that has no ground at all and it's extremely dangerous because you have no way to know the polarity when you are plugging it in and you could easily connect the phase with the hot one and short cirtuit the whole thing.
*FULL BRIDGE RECTIFIER*
सर क्या यह एलइडी फुल जल रहा है या फिर थोड़ा कम वीडियो में साफ पता नहीं चल रहा है
please help me grow my channel
@@fransiistaken आई एम सॉरी आई लव इलेक्ट्रिकल वीडियो
@@fransiistaken आप की वीडियो बच्चों के लिए
Kam kal raha hai
Kyonki 1uF sirf 70 to 80 miliampere ka hi current de payega
Jabki LED 5 Watt ka hai
One question , this circuit is ,, how many volts ac or dc 12volts tell
the output voltage depend of power of led and serial capacitor value
Focus on 1:01 second of the video, you will notice the circuit was wrong, then they change the circuit secretly 😂😂😂
Sorry sir.. I'm a beginner learning to try as in the video.. but the result is that the Elco 50v 470 uf is hot.. Where's the problem, sir? Please guide me. Thank you in advance.
Madness, to dangerous for many hobbyists.
I don't see you add any solder, how is that? Does that soldering iron add it where I can't see it, or did you edit that out?
How many amps?
How many ampere please
P = VI
V = 12 volt, P = 5 watt
I = P ÷ V = 5 ÷ 12 = 0.416 ampere.
However, the line input is A.C., and it is plainly rectified by a full bridge rectifier circuit. There's no voltage regulation circuit.
@@nileshw1368 khink you my friend
@@khelifinouredine1842 @Khelifi Nouredine you are welcome, my dear friend.
The above calculation is for the 5W LED. The source built in the video, however, provides an unregulated D.C. supply to the LED ; less than 0.1 ampere of load current, as it is based on the reactive property of the non-polarised capacitor ( 1uF ).
Thanks!
Let me explain the circuit. The value of input capacitor will determine the output current. A 1uf capacitor will bring about 60mA current. This is not dangerous although the voltage current ranged 260v. Why the COB does not burned because the current is too small. It will take about 500mA to work optimally but also cause heat so bad.
There's a mistake in the description. Not 12v but 260v. If you want to have a 12v you must add a 7812
Amperage?
thanks for video