Frequency measurement with red frequency meter module

electronium

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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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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.
 
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Nigel Goodwin said:
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.
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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.
 
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