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Ok, I see. Your explanations are very clear :grin:
One last thing:
In here :
The integration is only up to 180 and the omega is only pi/180 while here:
it is up to 2pi.
What I want to clarify, is that ok to integrate only a half cycle of full wave like this:
in order to find the average...
Ok I got it. I did search also and found that it is called as form factor.
Sorry if I am asking too much, from your explanation I can say that: Average voltage= (RMS Volt/1.1107) , am I right ?
Then I just try to calculate the RMS Volt (i.e. conduction angle 90) Vrms = 155.5 V.
Next, Average...
Ahaa, thank you very much.
I still have questions:
1. Why do you just integrate a half cycle (up to 180) ? Why don't integrate both positive and negative half cycle and then add them together in the end?
2. Could you please tell me how do you get 1.1107 ? What is the reason ? (My meter gives...
OK.
Ahha, found this link : **broken link removed**
Seem like it is exactly what I need. Take a look at the output voltage calculation at the bottom. It says Vo=Vs.D where D is the total conducting time divided by period. My measurement result is close to that.
1. Now what voltage is it? Is...
Well, If I want to make a comparison between the calculated load voltage with the measured load voltage, how I should make it?
Should I keep comparing the RMS voltage and find the difference ? or
Should I compare the average voltage ?
Or maybe I should compare the power ?
I'm getting more...
How do you find 71% ?
So you mean delay 90 will give half power (Watt) not half of the RMS or peak voltage ?
Actually I want to make a comparison between calculated RMS value with measured RMS value of the load, but by using the formula in post #1 give me too big difference. E.g. delay 90...
I have this formula to calculate the load RMS voltage:
I'm working on 220 VAC 50 Hz.
I try delay = 0 degree ==> Vo = 220 V this is right, the RMS
delay = 90 degree ==> Vo = 155.5635 why ?? It should be 110 V right ?
1. What is the function of ADC prescalar ? Why I need to use prescalar?
2. If I use 12MHz crystal and I choose prescalar of 16, then the clock frequency will be 750 000 Hz. But the datasheet says the frequency should be between 50 kHz - 200kHz. Any explanation about this?
3. If I use...
What is the principle difference between active low and active high ? What is the advantages and disadvantages ? What is their relation with sourcing ?
I found it. It's not the code, it's the hardware. I just build a new power supply with higher current rating and everything is fine now.
My stepper motors need high current and the 7805 based power supply cannot handle that which makes the external interrupt signal is disturbed.
Thank you.
If I use:
PORTB= motor_stepA[i] | motor_stepB[k]
then I should make i and k as global variable?
I use this but they do not work well.
PORTB = (PINB & 0b11110000) | (motor_stepA[i] & 0b00001111);
PORTB = (PINB & 0b00001111) | (motor_stepB[k] & 0b11110000);
So you mean put PORTB= motor_stepA[step1] | motor_stepB[step2];
in each of
void turn_A(unsigned char directionA, int stepA) and
void turn_B(unsigned char directionB, int stepB)
If like that, I should assign new global variable then ?
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