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That would be so much easier if you wouldn't put each sentence in a post of its own ...I'm going to go and read back through the thread, see if I can find answers
Hello,
Yes, the (-) goes to the GND and the (+) goes to the MIC.
Bertus
okay sorry for that! going through it now and im on page 12That would be so much easier if you wouldn't put each sentence in a post of its own ...
Hello,
When pin 8 is gounded the reference voltage will be about 1.25 Volts.
When pin8 is lifted with a resistor, the reference voltage will be higher.
Have a look at the formulas again.
Bertus
Hello,
Why do you want such high values?
Audio is not so high.
The 2.4 volts range is already quite high.
You might even need an amplifier between the filter and rectifier.
Bertus
Hello,
In stead of making a complete series of filters twice, you could add a simple amplifier between the filter and rectifier circuit:
View attachment 61950
That would save you a lot of work.
Bertus
I changed the R23 resistor to 1meg and on the 7000Hz circuit the signal reaches 8.7v at the top and 6 at the bottom so this is good, now waiting for the program to run and I will screen shot it and do the same for the 45Hz one too!Hello,
Now you have R13 at 4K7 and R23 at 165K.
Change that to R13 at 27K and R23 to 1Meg and see what happens with 45 Hz and 7000 Hz.
With those values C14 will have a factor of 6 less influence on the frequency dependend gain.
Bertus
Didn’t you take notes (written)?.
Bad move.
This is not a telephone conversation with forum members.
Read the thread again! All the information is there.
If Mr Bertus remembers, I’m sure he’ll reply, but if not, it’s up to you to find that information that has also been told to you more than twice.