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i use pic16f676 ic and triac for fan speed controlling

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jayesh9714

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Hello
Friends
Please help me any one.

my hardware is complete and ok.
But my programming of program in few misteck.

I have use pic16f676 ic and bta12 triac.

All applice can be ob/off.
But
When
I connected Fan that time fan will not start.but only doing harmming of fan.
I have also apply zero cross detection In program
And i also use pwm base singal

Thus for that
when i start my device on/off bey nec remote,that fan will not start and system is hange.
Please give me solutions of programing
I also use el3021 opto copler.

Please help me
Thanks
 

I used a triac in my homebrew fan speed control. The fan was a 'squirrel cage' type (mounted on a wood stove). The type is important. As I understand it, most fans cannot be speed-controlled by a triac, with their rpm dependent on the frequency of the AC supply.

If you simply limit power (as with a triac), the normal fan tries to spin at full frequency. When you continue to reduce power, there comes a point where it doesn't spin at all. I guess that's when you get only the humming noise.

Ceiling fans are a different animal. You may be able to control one of those with your pic.
 

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