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I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs or Diacs or so, so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got this circuit which I understand it all except there is a part I didn't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC the MCT2e which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ? in short I want to know the princibleprinciple of how this part of the circuit works in order to detect the zero crossing point in the AC wave.

Thanks in advance.

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs or Diacs or so, so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got this circuit which I understand it all except there is a part I didn't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC the MCT2e which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ? in short I want to know the princible of how this part of the circuit works in order to detect the zero crossing point in the AC wave.

Thanks in advance.

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs or Diacs or so, so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got this circuit which I understand it all except there is a part I didn't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC the MCT2e which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ? in short I want to know the principle of how this part of the circuit works in order to detect the zero crossing point in the AC wave.

Thanks in advance.

more declaration of what I want.
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How to use Triacscan an optocoupler detect the zero cross point in building dimmablean AC circuitwave?

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs or Diacs or so, so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got thethis circuit butwhich I understand it all except there is a part I don'tdidn't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC the MCT2e which I think is an optocoupler, how can this IC detect the zero crossing in thethe AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ? in short I want to know the princible of how this part of the circuit works in order to detect the zero crossing point in the AC wave.

Thanks in advance.

How to use Triacs in building dimmable AC circuit

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got the circuit but there is a part I don't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ?

How can an optocoupler detect the zero cross point in an AC wave?

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs or Diacs or so, so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got this circuit which I understand it all except there is a part I didn't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC the MCT2e which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ? in short I want to know the princible of how this part of the circuit works in order to detect the zero crossing point in the AC wave.

Thanks in advance.

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I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background concerned about using Triacs so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got the circuit but there is a part I don't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ?

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background concerned about Triacs so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got the circuit but there is a part I don't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ?

I am having some trouble using Triacs in order to dim a light bulb operating at 220V AC, I am a student at school and I don't have any background about using Triacs so I seeked the internet for circuits which uses a microcontroller in order to control the Triac to control the speed of an AC fan or brightness of a light bulb. enter image description here So I got the circuit but there is a part I don't understand in the circuit so that's why I am asking here for help. enter image description here So my question is concerned about this IC which I think is an optocoupler, how can this IC detect the zero crossing in the AC wave ? Although the input in this IC is rectified using a bridge rectifier ? And also what is this IC properties ? Can any general purpose optocoupler be used or there is special specs. For it ?

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