Bluetooth TRIAC AC power control

Best & Fast Prototype ($2 for 10 PCBs): www.jlcpcb.com
Thanks to JLCPCB for supporting this video.
Learn how TRIAC work and how to control AC voltage. Detect the zero cross and synchronise the firing pulse with it. Use DIAC to control the gate of the TRIAC. Finally we add bluetooth connection adn dim an 220V AC light bulb.
my Q&A page: electronoobs.co...
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Canal en Español: / electronoobs en español
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LINKS
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Tutorial webpage: www.electronoob...
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Schematic (zero cross): www.electronoob...
Schematic (potentiometer): www.electronoob...
Scheamtic (Bluetooth): www.electronoob...
Code (potentiometer): www.electronoob...
Code (Bluetooth): www.electronoob...
App (android.apk): www.electronoob...
App(.aia): www.electronoob...
Please, like, share and subscribe in order to motivate me for moe videos like this one. Thank you!

[@abrahammagnifico9538]

FULL BRIDGE RECTIFIER !!!! ......., Thanks electroboom for this stuck in my head.

[@ManofCulture]

BOOM! -Taras Kul

[@josefseibl2932]

Thanks for the really great tutorial! I think your explanations are spot-on. You explain exactly what is necessary without going too much into basics or advanced stuff!

[@ajumpa1]

Great explanation! I got a little nervous when you were pointing at the high voltage components with a metal screwdriver.

[@extraace]

Thanks, I finally have a good understanding oh how triacs work now. I've watched a lot of videos on them and mimicked the circuits but never fully understood. So simple.

[@mmdnaderi7183]

i just gonna fall in love with you when you say FULL BRIDGE RECTIFIER :D

[@alfredonovoa8124]

The current in Spain has 230V AC. That's why you have 227-229V on the osciloscope.

[@rongarza9488]

The banana is not for sale, it is to let you compare the sizes of the items near it. I think that is what he means when he says it is for scale. ¿Pero que sé yo? (but what do I know?) Good job, Electronoobs!

[@hc4633]

This channel needs more subscribers! Great tutorial paired with common sense.

[@ELECTRONOOBS]

Hudson Chamberlain thank you so much!

[@Ne555N]

VERY IMPORTANT SAFETY ADVICE!! In english here! En español abajo! Good circuit men I built something similar in the past. I need to clarify one point that is very important. Take care with inductive loads (motors, CFL...) especially with heavy ones!!, because triacs and also diacs have dv/dt specs, it means that if you change the voltage very fast the triac (or diac) can be damaged or even worse, destroyed :S. (When you switch ON/OFF a inductive load voltage spikes can happen). Also if you connect a heavy load (which demands a lot of current) there will be more power disipation on the triac/diac because Power = Voltage x Current, this means that the triac/diac can get very hot quicky and this will cause the destruction of the component. Check the datasheet of the component and put a good dissipator to prevent this ^^. As bonus! ^^ To prevent problems with heavy inductive loads you should use a snubber circuit. Designing a snubber circuit requires more knowledge in electronics but if you are interested I invite you to search in google snnuber circuit for diacs/triacs ^^. I hope you, people, understand my explanation :), I'm from Spain too :P. See you!! and have fun with safety electronics!! ;D. EN ESPAÑOL!!! para los hispanohablantes! ;) Buen circuito tío! construí algo similar en el pasado. Tengo que aclarar un punto muy importante cuidado con las cargas inductivas (motores, CFL...) especialmente con las "pesadas" (bobinas grandes tipo transformadores, motores grandes...) ya que los triacs, (tambien los diacs) poseen especificaciones dv/dt lo que significa que si se cambia el voltaje bruscamente (muy rápidamente) el triac/diac puede resultar dañado, o aun peor, destruido :S. (Cuando conectas/desconectas una carga inductiva se pueden producir estos cambios rápidos de voltaje de los que hablo). Ademas de esto, si se conecta una carga que demande mucha corriente (no tiene porque ser de tipo inductivo), habrá mas disipación de potencia ya que Potencia = Voltaje x Intensidad, lo que hará que el triac/diac se caliente muchísimo y esto puede causar su destrucción. Recomiendo mirar el datasheet, mirar que potencia soporta el componente, que intensidad y que voltaje ^^. También una buena idea es poner un buen disipador para prevenir estos incrementos de temperatura en el componente. Como bonus!! ^^ Para prevenir problemas con cargas inductivas "pesadas" convendría usar un circuito llamado snubber, es como una especie de filtro que evita picos de voltaje, pero para diseñar uno hace falta tener conocimientos mas avanzados de electrónica, os invito a buscar en google snubber circuits for triacs/diacs (circuitos snubber para triacs/diacs). Bueno después de todo este pedazo de comentario, espero que nadie se electrocute, se cargue la instalación eléctrica de su casa... jaja Disfrutad de la electrónica, si vais con cuidado nada malo pasara! un abrazo gente! ^^. Para el Autor del vídeo! me identifico contigo yo también estudio ingeniería Electrónica y ya estoy casi acabando tengo 24 años! jaja Un abrazo sigue así y cuidado que no se te electrocuten los subscriptores! jaja :P

[@DaSnipz]

I'm planning to use this for speed control of a regular air fan. But I'm guessing I should use a snubber network to deal with the noise of the inductive load, right? Excellent tutorial btw, keep it up!

[@indritbreti4979]

I have been searching for this video for too long, because i didn't know how to use a Triac. Thanks!

[@danielroibert5631]

Hello. thank-you for this video. But you absolutely have to explain how you connect your oscilloscope to the main 220V. Also how you mesure at the same time the input and output of the bridge rectifier :-) Without complète explanation some people’s will blow there oscilloscope or burn they house.

[@ELECTRONOOBS]

Daniel Roibert true and now I regret I didn't said that in the video! Thanks and keep up!

[@electronic7979]

Excellent video.it was useful to me.thank you so much.

[@drslartibartfass]

Thank you for sharing. How did you calculate the 47k resistors for the optcopler in the zero detection?

[@naderhany3639]

Great explanation Electroboomnoobs

[@krakatoa1987]

Saw many videos related to this topic, and this is the one that made me understand, great explanation, oscilloscope and edition!

[@Adrian-Carstea]

Code is incomplete. Where is last_CH1_state declared?

[@bernhardfraunhofer4933]

i have the same problem

[@yasirshahzad3732]

ISR(PCINT0_vect){ if(PINB & B00000001) detectado=1; }

[@yasirshahzad3732]

Haha this code was extra with no functionality in this code, just replace with the following, thanks

[@SkjoyBd]

@@yasirshahzad3732 I have same problem.Given code generating error.

[@akibrahman1497]

Hello sir Please help me Can i use moc3052 instead of moc3051 And Can i use EL814 instead of EL817 Please answer me

[@imbakebab]

Can i use this method to control a 3kw heating element?

[@mancio92M]

congratulations another beautiful tutorial

[@gametabulas]

Thanks bro, your videos help me alot. I am currently in college, once i graduate (hopefully in 8 months) ill make sure to fund you on patreon.

[@nipusfreetution3458]

Nice one. This part was needed for a project of mine. Thanks alot. BTW whats up with the banana?

[@w.s.n.nemindara9510]

Thank you for the content.. Can we use this for control devices that use more than 1000W.

[@stonecold7945]

I am kind of new to this channel, but what's the banana for?

[@ELECTRONOOBS]

Stone Cold7 banana for scale, of course!

[@yasirshahzad3732]

Hahah

[@yasirshahzad3732]

Stone Cold7 its for sale you can buy it

[@stonecold7945]

Yasir Shahzad How much is it!

[@sayantanmaiti2513]

One question... You must be using interrupts when taking the output signal from the opto IC that goes into the UNO... but you are connecting that to pin 8 of UNO.. pin 8 is not an interrupt for atmel328... so how you are dealing that...are you just using just if else for that???

[@ELECTRONOOBS]

Sayantan Maiti what do you mean? You can activate pin state change PCMSK |= (1

[@sayantanmaiti2513]

Thanks for the info...I previously thought that only D2 and D3 are being used for interrupts ..

[@debashisdas7557]

Really nice tutorial.. And I have a question can u control more than one light bulb with this circui

[@6112oo6]

I NEED TO DO THE SAME THING, AND I NEED THE CODE FOR THAT!!! IF YOU HAVE ANY IDEA????

[@chaliskpito8634]

maybe it's late for an answer, it is possible to control several lamps, the idea is to create a delay management with an array, the delays must be distributed according to a decreasing (or increasing) sequence.

[@crouserhd297]

Hello, is it possible to buy something like that? I only need about 80W

[@24242424h]

hey bro, can we use this circuit to vary the voltage being supplied on an AC induction motor? do you think it will damage the motor?

[@caffeinatedinsanity2324]

Not a good idea. AC motors generally rely on a clean sine wave (or sine wave pwm) to be driven, and chopping it with triacs isn't really going to give good results. My guess is you might have to build (or buy) you own VFD, especially if you want to control speed, since the frequency of the AC current needs to be modulated. Changing the voltage will affect the maximum torque

[@RandomakerYT]

Not an induction motor. The only type of AC motor this will work for is a universal motor.

[@joetke]

Great pedagogy! instructive video indeed. And your accent adds an awesome exotism to the whole ;)

[@kedarprabhudessai]

awesome !! great video as always :) this is the video for which i was waiting for. keep it up my friend

[@diazpty]

Where do you connect the banana? Good job!

[@kidtronics8437]

sir. please make a video tutorial about.. how i control my bed room light and speed control my fan

[@andreswanepoel4826]

Such a good tutorial. You could be the professor

[@MCsCreations]

Fantastic work, man! Really, really nice! 😀

[@arishy]

Love your way of clarifying the concepts behind your project. You mentioned briefly that you can use step down trans say 230/12 volt. Is that mean that if I provide 12 volt to your circuit all the components will function with NO CHANGE. of course I will use an LED as a load instead of the 220 volt lamp.

[@parijatpandey1061]

hello everyone.. Great video brother.. i tried it and it came out good.. i just want to make some changes in functionality.. i want switch on the bulb with incrementing brightness but WITHOUT POTENTIOMETER. and WITHOUT THAT APP. i am new to coding ,can anyone help me out with that part ?

[@pippiscariota]

Hi! Good job, i have a question: talking about soft start, if i use an ssr driving it in pwm, do you think it works?

[@ShivamMishra-tf6cf]

Thanks for the video. I want to ask why have you added a delay after making the PIN3 HIGH.

[@projectelectronics9339]

The Bluetooth module is designed for 3.3V input. By connecting it to the 5V supply, it will work but it also shortens the life of the BT module and eventually damage it. Better to include a voltage divider fot the power input. Just a heads up ;)

[@markharrisllb]

Thank you, I now understand trials.

[@SaliyaRuchiranga]

been waited for this , great !!!

[@vovanikotin]

How did you connect oscilloscope to mains and not shorts its ground to AC ground?

[@ELECTRONOOBS]

Ave Vovus! Only connect the probe. Don't connect GND from the oscilloscope when working with AC. After the rectified wave you can connect GND as well.

[@vovanikotin]

Ok, this is important thing. Also check EEVBlog about it - How not to blow up your oscilloscope - kind interesting about correct connection osc to AC.

[@skumar716]

I have the same model scope, are you using the standard probe provided in 10x mode or you got some different probe for AC230v

[@pranavnatekar4183]

Great tutorial!!!One question, what about the loads above 200 Watt, what changes do I need ???

[@usmanumer9871]

i like him . because he give answer of our comments

[@Exotic_Chem_Lab]

Can i use it to control 1000W nichrome heating element?

[@GRBtutorials]

Actually, it's 230 V, not 220 V. This was changed a long time ago here in the EU, Russia and Ucrania. Check this (in Spanish): es.wikipedia.org/wiki/Electricidad_dom%C3%A9stica#Historia_de_tensiones_y_frecuencias. It might be 220 V if you're far away from the supply cables that go to your house (which are guaranteed to give 230 V ± 7%) because of the voltage drop. I confirmed this: if I turn on a high power device (like a radiator), the voltage drops. Sometimes the voltage goes to 210 V or less, and that's when my line-interactive UPS' relay clicks and steps up the voltage to 230 V. I wish all this was finally unified sometime and all countries used the same voltage, frequency and plug type! I'm working on a new plug type which I'll use in my smart plug (Kickstarter coming soon), but it'd be difficult to do something about the voltage or frequency (bulky transformer for voltage and maybe a matrix converter for frequency, easier said than done).

[@ELECTRONOOBS]

Yes, that's true. Sorry. is 230V

[@MuhammadMohsin-tm2pq]

kindly share its proteus simulation as well

[@chaliskpito8634]

hello, nice video and explanation, is there a way to use micro / millis instead of microdelay? thanks

[@ashu_ei]

That were too good... Sir... Thanks for this video

[@ruslan.zhumabai]

Good project for smart home.

[@updateyourjob7014]

Really Nice finally i understood how to make dimming controller device

[@armanhossain2491]

good project

[@xgamerbih]

one question: Did you connect the photocoupler to 220v? All I see is 220v going to the full bridge rectifier and then the photocoupler? Reading it's datasheets, the photocoupler accepts around 5-6V? Am I missing something here? The schematic shows like that too, just 220V, no step down converters or such.. thanks in advance!

[@NeerparajRai]

Is it safe to connect dso directly to mains as the ground will b common for dso source and ac supply.??

[@TheTechnocrat]

I made this circuit and I am controlling brightness with a potentiometer. The dimming works, but I am getting visible flickering in my bulb. Could you please help me with that?? thanks!

[@nguyenthuy9824]

Hi. Thanks your videos. Once question. is it posible to control, adjust AC lamp dimmer or AC motor speed by potentiomter and NRF24? if yes. At Which can I be seen? Thanks

[@obaidullahsarker6221]

very nice project also presentation. thanks

[@PhG1961]

Great video ! What's the banana for ?

[@ELECTRONOOBS]

Philip Gevaert for scale. Lol

[@crouserhd297]

Hello, i tried this out, but it doesnt give me an output voltage. Do I need to connect a load to see if it works?

[@Francirius]

When u connected the mains voltage to ur oscilloscope, u didnt connect the GND cable? Or did u had an isolation transformer?

[@TechnoEveryday]

🆒 Thank you so much for uploading this video. aia file link is not opening. Could you please fix it? Thanks a lot

[@rudrakshavegad1999]

I like the idea of using 817 opto coupler. Is it good to apply 220v at input of pc817 . I saw it in your schematic

[@alejandrokruchowski8813]

Excelente video! Una consulta, sería posible utilizar software serial para la comunicación bluetooth? Quiero implementar un control de velocidad comunicado por RS485 sería muy útil poder usar el puerto serie para debug y software serial para la comunicación 485. Muchas gracias!

[@hectorbarrera9496]

Hi, nice video, I have a dummy question, how do you connect your oscilloscope, how can I see the the trigger pulse and the lamp wave?

[@hristohristov8341]

Hi, great video! Thank you! Sample and useful! Great! But I want to ask you for range of voltage after the full bridge rectifier? Or what is the max aloud voltage on input anode/cathode on EL187 optocopler? Regards! Great job, go ahead!!!

[@vinodkumarmourya1485]

Thanks for making such kind of video, Today I have learned how to control AC voltage

[@er.jugalmandal7736]

Can we connect celling fan without using extra protection circuit because coils are making negative voltage and it will damage the TRIC and DIAC

[@lazal3m]

When you measure the AC Voltage on the bulb contacts, will it always be 220v but duty cycle will vary from 1-100%?

[@ScienceLab760]

Nice video and good explanation, thanks for share

[@tanviralam8073]

Is it wise to connect ac voltage to breadboard ?

[@MrPinolatino]

Hi nice job, what about solid state relè? Does it work with pwm for soft start?

[@natanaelalfaputra_te_0559]

why duty ratio of PWM do not decrease and increase??

[@rinoprihantoro155]

where the oscilloscope probe is connected so that it can be displayed on the screen? apakah di mosfet atau di output dimmer?

[@incxxxx]

What sense has variable last_CH1_state in your code, when it is always zero? I see no sense. Am I right?

[@michaparasol9892]

Graetza bridge to powered LED? Are you sure?

[@englishinsambalpuri9364]

What's wattage of all resistor for this project specially 47k resistor ?

[@sivabalanvkl]

Hi bro first of all thank for this job .i want to do same think using three phase can you guide me.

[@samhsavdr9647]

15watt 220v panel led dimmer adjustable circuit ....good idea .all people waiting

[@Stepanhuge]

Puede funcionar con un motor de los típicos de ventilacion para cuarto de baño.¿

[@zyghom]

I am trying to do the same: 1- sleep between 0 to 10ms after zero detected 2- turn 1 the pin 3- sleep for 100us 4- turn off the pin but my fan is behaving like drunk - unstable I am not sure if this is fan issue or what While detecting edges, we shall see 2 times per Hertz, right? So 100 per second

[@larryivanyoung3328]

HI ELECTRONOOB, nice work you had there. What can I substitute for GBJ1506?

[@ElectroIoT]

Plz make video how to control with blyk and esp8266

[@mhzxtal922]

Hello Electronoobs, any procedure step for designing the app or any AIA code provided?

[@soulofcinder2351]

if I want it to work as AUTO soft starter without variable resistance what would I change in the circuit?

[@maliarif2023]

Can we regulate ceiling fan via above mentioned circuit?

[@hobbytechnical1097]

Please tell me sir what I am using ic moc 3021 in the project plz tell me.

[@maliarif2023]

wonderful work electronoobs,can you please tell me the name of Android application?

[@fachryal]

Hello friends, i really need the AC Dimmer for 24 V AC Load, can I use that design to drive it? or is it require another pcb desain? thankyoou

[@saladino-3974]

Esperare el tutorial en español :)

[@arushgupta5183]

Nice video. BTW you would not need a triac as the MOC3020 already has one :) It worked for me without the triac!

[@zuhaibchoudhary4635]

hello can you please tell me is it reliable to use triac for voltage controlling or is there any other method as someone told me when you control volatge with triac the current will increase very much

[@arushgupta5183]

@@zuhaibchoudhary4635 Triac is one of the two options I know voltage controls, (the other is with mosfet / IGBT) and triac is very reliable. BTW In the MOC3020 it is recommended not to connect it directly to load

[@zuhaibchoudhary4635]

@arushgupta yes I know dear but Mosfet and IGBT are for controlling DC voltages I am asking for any other method than triac for AC control

[@arushgupta5183]

@@zuhaibchoudhary4635 Oh, then I woyld reccomend triac cause that is the only one I know, do you know more?

[@zuhaibchoudhary4635]

No I also dont know anything elsw

[@universityofelectronics2410]

Excellent dear

[@robertosousa8065]

I have a question ! I'm doing a outdoor lighit system, with arduino, Pir sensor, Triac Bt139 e Moc3021p ... I'm with some difficultys. Can you help me please ? Before i was using a relay (5v), with a tiristor and a diodo, but the relay had me some problemas and i'm tryind this other way ..

[@nomiahmad5268]

hello, i need a bit help. i am able to control brightness of light through bluetooth but the problem is that, how to add simple on/off program in the same code. actually, i am facing problem when i add some code for relay etc. for instance, if(variable== 'R') { pinmode(relay, high) } help will be appreciated. thanks

[@nomanmalik5215]

Hi, I designed the same circuit but I am getting only positive pulses at output, the negative half is completely clipped. Can you please guide what the issue is. The output of MOC3020 provides pulses in both positive and negative halves at the output but as soon as I connect those with gate of TRIAC, only positive pulses are there. What would be the reason (I already have replaced all the components).

[@steffan9415]

Might you help me!! I'm trying to do this project for my power electronics class! and then I built everything the same, the problem is that the focus remains blinking a lot, I control it with the application and in any position of the app slider the focus flashes, sometimes even the light goes down well. What will it be? In my country it is voltage 120, will that be why? another thing is that I am using the triac bta 12. Help!

[@bilalqasim2555]

Can anyone tell which full wave bridge rectifier is used? Link for ebay is not working.

[@martinwestermeyergondonnea84]

what is the voltage of the output of the diac? and what its the source of it? thanks for the good videos dude, you are awesome, i just finished a diy VFD controlling an induction motor thanks to you.

[@ferdousihossain6236]

Yes by using mcb ckt breaker

[@AnilKumar-wh8db]

How about sharing your work, Diy VFD ...

[@coolmediakh6049]

could you help me.? i meet the problem with delaymicroseconds which it work only 2300 ms after zero crossing detection. thanks in advance

[@sidharthap]

How are you probing AC mains without the big bad BOOM?!! Can you please explain.

[@sapankotak3777]

sir. can i control speed of my AC ceiling fan by using that Schematic and code (Bluetooth) ?