Isolated Triac Control

[JRaViN219]

Hello my friend

I made a light dimmer using a PIC mircontroller you can see it on my videos, but I was wondering what kind of optocoupler and transformer did you used for this project. Do you think I can get them from an old SMPS? I´m begining with the MSP430 family and would like to attempt something similar.

Thank you.

[dktulu]

could you tell me what kind of pins do you use to conect de detachable board to your circuit? I'm using the traditional pins but sometimes it doesn't contact properly to all the ports.

Thank you.

[thongola]

could u plz tell me the code of the program. thax for sharing

[dktulu]

Hello, My name is Jose Miguel and I'm writting from Spain. I want to ask you how much voltage do you use to supply the detachable target board externaly and wich port do you use (P1?)

thanks a lot.

Jose Miguel

[DirceuRodriguesJr]

Hi Jose, Yes, the port is P1. The DC input is 12V (to driving pulse transformer). Also, there is a linear regulator on board, providing 3.3V for MCU.

Dirceu.

[barnett256]

Will a light dimmer slow a shaded pole motor? Im trying to slow a humidifier down by more than half.

[DirceuRodriguesJr]

Hello barnett256, the AC single-phase motor (as shaded-pole) is very inductive. So , the voltage and current are not in phase. A very suitable thyristor based controller (in our case the MCU) must apply several pulses, from the trigger point to the end of mains voltage - this will provide the appropriate synchronization. This is detailed on app note from ST: "AN308 - TRIAC analog control circuits for inductive loads". The theory applies to digital control, too.

Regards.

Dirceu.

[Pujc]

ahh thats not so easy for me :( Good work!

Jól tolatod!