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How many times something happens per second, measured in Hz (hertz).
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Design help! -- Play a pure tone into a mic and depending on its frequency a specific LED wi...
I'm trying to make a frequency detector that detects between 5-10 different frequencies. There will be a mic, an amplifier, a set of bandpass filters, and an LED that corresponds to each filter. … The goal is to play a relatively pure tone into the mic, and have a certain LED light up which will be telling of the frequency of the tone. I want each filter to have a range of around 100Hz. …