Hey all! I'm very happy to have discovered this website.
So my project was to make a sound spectrum analyzer (circuit in the attachment) and the software part is fine, but I have a problem with the microphone. I should note that my microphone does NOT have adjustable gain like in the picture, I am using MAX9812 (also in the attachment). Even though the module has an integrated circuit, the OLED display only shows something when signal has a single frequency and is very intense (loud), and this is done by using a frequency generator on my phone and bringing it very very close to the microphone.
I have been trying to build a circuit on my own using an electret microphone, LM324 op-amp and some capacitors and resistors but have failed everytime.
Does anyone have any brilliant ideas?
Btw, sorry if I missed some essential information, just ask and I'll write it as soon as possible. The circuit that I built is also in the attachments (I took it from some previous post) but still doesn't work.
I hope someone can help I would really like to understand this.
Amina
So my project was to make a sound spectrum analyzer (circuit in the attachment) and the software part is fine, but I have a problem with the microphone. I should note that my microphone does NOT have adjustable gain like in the picture, I am using MAX9812 (also in the attachment). Even though the module has an integrated circuit, the OLED display only shows something when signal has a single frequency and is very intense (loud), and this is done by using a frequency generator on my phone and bringing it very very close to the microphone.
I have been trying to build a circuit on my own using an electret microphone, LM324 op-amp and some capacitors and resistors but have failed everytime.
Does anyone have any brilliant ideas?
Btw, sorry if I missed some essential information, just ask and I'll write it as soon as possible. The circuit that I built is also in the attachments (I took it from some previous post) but still doesn't work.
I hope someone can help I would really like to understand this.
Amina
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