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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Guess it depends on what you mean by "detecting". NE567 can give you a logic output when it detects a particular frequency. If you need an analog representation it's a whole different ballgame.
You need an audio frequencies Spectrum Analyser. On my pc the Microsoft Media Player has one with many vertical bars for the frequencies, but they aren't calibrated with their frequencies.
Maybe you can find a FFT program for your pc to show the frequencies.
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