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Hi everyone,
At last found the solution for dimming we can use the 2 methods
1. The famous phase control firing where we give delay for some time before triggering which results in the chopping of the ac wave
2. Second is that we can simply just do the PWM(Pulse Width Modulation ) but we have to...
Hi Jigar,
Thanks for your reply but I have small doubt is that here I am giving the trigger for around 0.1ms so if I connect LED to the output pin is it possible that I can see the blinking ?.
And regarding the delay as for at89c51 microcontroller has no default delay function I had written a...
Hi Jigar,
Actually this is what I have done,
1.In the first step I have checked for the zero crossing detecting circuit i.e, it is 5v trigger which is coming like a spike
2.In the second step to know whether my uC is triggering or not I have first written a pwm program where we can see...
Hi Jigar,
I don't know where is the wrong in the hardware . I think the triac trigger circuit is fine as it is typical application circuit I think my microcontroller is not triggering .
The output I got in the proteus is that if I change the levels of input the output voltage is changing
but...
Hi all,
Is there any mobile application of any platform which have finger print authentication software either through camera or through the touch screen.
If it was through the iphone or ipad it would be very helpful to me .
My doubt is " is it possible to do the finger print authentication by...
The circuit remains same the only modification is the output of zero crossing is given to the interrupt pin not the p2.1
code:#include<reg51.h>
// LED Pin
sbit LED = P2^0; // Pin P2.0 is named as LED
//Function declarations
void cct_init(void);
void InitINT0(void);
void delay(int );
//...
Hai Everyone,
I have been working under I have been working under dimming of ac loads using the microcontroller .
The concept I am using is the based upon the basic operation of the triac, as once the gate of the triac gets the trigger it will be on for next zero cross
so for this I have taken...
It all depends on the final requirements if you want to do dimming or something like where you want switch at the rapid speed there you have to go for the triacs as the switching times of the ssr are in order of milliseconds which will not be suitable if you are going for phase control firing...
I have a doubt regarding the zero detection for the microcontroller..
can we give the zerodetection output to one of the port pin and use that for further purpose or use some interrupt routine for giving the zero detection output to the microcontroller
I didn't check the code I am giving you but I hope this will give you an idea regarding using the one key for varying the duty cycle. The pwm all depends on varying the duty cycle.I hope it will work once check it out with simulator then go to the further steps
org 00h
mov p1,#00h
MOV TMOD,#01H...
I don't know different errors are coming when I am dealing with the hardware as I stated earlier I got the desired output on the simulator but when I am doing it on the bread board it is showing different errors like I am using the port 1 for input but as per my code it should become zero first...
Hai every one,
I have been working under varying the brightness of the ac loads using the triac and a microcontroller.
I have written code for it and I tried for the output on the simulator as we cannot see the dimming on the simulator I have seen the output voltage which is varying for...
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