Your original thread post says :
Hi,
I am designing a 8051 microcontroller system. It has ports for interfacing.
How can I control a 230V 100W Electric Bulb using 8051 microcontroller ports?
In essence, how do we control high voltage applications using 8051 microcontroller?
Sincerely,
Srinivas Nayak
On given circuit also is used PWM signal.
Can You explain "How can I control a 230V 100W Electric Bulb" ?
What you mean under control ? (on/off, dimmer,...)
Thread starting post should have all needed element for discussion.
I don't think it will work practically why because we are intended to control using PWM signal but because of the MOC 3041 it will be triggered at zero crossing irrespective of pwm .
We are supposed to use a non zerocrossing optocoupler and a zero detection circuit whose output is given to interrupt pin of the microcontroller and programmed accordingly.................
Any clarification is appreciated
The zero cross detection circuit is the most critical part when designing a dimmer. This circuit will watch the input power waveform and detect when this waveform crosses the 0 point and becomes 0 volts.
Zero cross detection circuits are mainly used in cases when the dimmers needs to be controlled from a micro controller. In that case, the micro-controller needs to know the zero cross detection point of the waveform, so that it can calculate the angle offset to send the trigger pulse to the gate of the triac.
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In electronics everything can be done, exactly everything, even things that we cant do today and dont know how, tomorrow or in near future will be usuall things.