Hi all
I just need some help on my project.
what it will take to make a circuit that indicates by turning an led on. when a particular Ac signal is applied. For eg. 2 + A(Sin(2pi*f*t) where 1<=A<=4 and 20hz <= f <= 20k Hz.
and also switch on another led when the frequency is between 970Hz to 1.03khz.
i only know that a narrow band pass filter will be required to pass the desired frequency.
I just need some help on my project.
what it will take to make a circuit that indicates by turning an led on. when a particular Ac signal is applied. For eg. 2 + A(Sin(2pi*f*t) where 1<=A<=4 and 20hz <= f <= 20k Hz.
and also switch on another led when the frequency is between 970Hz to 1.03khz.
i only know that a narrow band pass filter will be required to pass the desired frequency.
