ok.... i would like to show to you one circuit that i got from a particular site.... it was a pitch detector.... but i did not understand how it works.... i understood the first part of the design.... that is the given waveform is converted to a square wave using an op-amp... but couldn understand after that.... can you explain the working of this circuit??? (we do not want to copy that idea, but if it works, we would like to do something similar to that...) i have attached the circuit for reference...
moreover when listening to FM radio, while tuning a particular station frequency, i have seen a LED glow up.... that means my circuit has latched on to the particular frequency rite?? how it works?? and is it of some relevance to my project???
moreover when listening to FM radio, while tuning a particular station frequency, i have seen a LED glow up.... that means my circuit has latched on to the particular frequency rite?? how it works?? and is it of some relevance to my project???