I'm trying to make a frequency selector that selects between 5-10 different frequencies. There will be a mic, an amplifier, a set of bandpass filters, and sets of LEDs that correspond to each filter. The goal is to play a relatively pure tone into the mic, and have a certain set of LEDs light up which will be telling of the frequency of the tone. I want each filter to have a range of around 100Hz.
If I play a tone of 250Hz, the set of LEDs that correspond to the 200-300Hz range should light up.
Can this be done by having bandpass filters leading up to LEDs, or is there more to it than that? How can I make sure that the filters only select frequencies inside a 100Hz range? I think this will have something to do with quality factor and bandwidth but I only have a vague idea.
If I play a tone of 250Hz, the set of LEDs that correspond to the 200-300Hz range should light up.
Can this be done by having bandpass filters leading up to LEDs, or is there more to it than that? How can I make sure that the filters only select frequencies inside a 100Hz range? I think this will have something to do with quality factor and bandwidth but I only have a vague idea.