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# Frequency measurement with red frequency meter module

#### electronium

##### Member
Hello guys, I hope you are doing well
Is it possible to measure city electricity frequency and pwm peak of power transistor with this module? How is it possible?

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According to the fact that friends and colleagues took the trouble to do some answers with software analysis, we want this topic to end, why can't this module measure the switching frequency? It is correct to use the sound card as an example instead of the scope, but we want to proceed with this module... I will show you in a few more posts, even though I connect it directly from the base and gate transistor to the module, it does not show the frequency. We are here for the proverb that says that the engineer congregation will either build a way or find a way
As I explained long , there's no point in measuring it anyway - and as it commonly varies all over the place a frequency counter is useless, particularly a 'toy' one like this. It will just keep giving different readings every time it updates.

As I explained long , there's no point in measuring it anyway - and as it commonly varies all over the place a frequency counter is useless, particularly a 'toy' one like this. It will just keep giving different readings every time it updates.
Dear engineer...let's implement this module with the help of other colleagues. Your experience is high and I will implement your words to conclude that this module is good, it is useful, it helps projects.

So where is the 1M : 47K divider, prior to the 100K and diodes?
Dear engineer... How many resistors should I divide for the peak voltage of 320v that comes from the collector of the 13001 transistor?

قبل از انجام بالا، زیر را بررسی کنید. 5.1 ولت زنر و معکوس Vf ممکن است بیش از حد باشد
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5.1 ولت @ 47 میلی آمپر با استفاده از این مدل با 12 ولت rms، در واقع 10 درصد بیشتر تایپ می کنید. بدون بار روی ترانسفورماتورها، بنابراین فرض کنید خروجی V ورودی دقیق 13.2 میلی‌ثانیه بدون بار باشد.

سپس با این مدل زنر به دلیل 100k Vp، IP هستند; +5.01 ولت و -10 میلی ولت در -155 uA pk سینوس بسیار خوب است.
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من دوست دارم از شبیه ساز مرورگر ساده Falstad یا هر ابزاری که می دانید دقیقا مشخص کنید استفاده کنید.

هنگامی که پاسخ دیود VI را تأیید و درک کردید، می توانید این کار را تقریباً در ذهن خود انجام دهید.

i don't want to let go of the story, I have to conclude. I connected a wire directly from the in base to the collector of the 13001 transistor, which shows 320v with a multimeter. For more accuracy and no noise, I need a resistance divider that connects the black wire to the module. I will send you a video so that you can guide me better
video test And analys single wire to collector 13001 on pin in module

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