To understand the electrical schematic and actual working system of this project we resort to the previous knowledge about filters, and made a summary of these so that our calculations and design are understood:
Electronic Filter: is an element that discriminates a certain frequency or range of frequencies of an electrical signal that passes through it, being able to modify both its amplitude and its phase. In our project we use them to "alter" certain frequencies.
The topology of our equalizer includes a Low Pass filter of 62 HZ, 3 filters Pass band of 500 Hz, 1K Hz and 4K Hz and a high Pass filter of 8K Hz. These filters were chosen to create a device that modifies the amplitude of our signal, which translates into different amplitudes for each frequency band, that is, an equalizer.
In summary, each filter performs a different filtering action:
Low Pass Filter: A low pass filter corresponds to an electronic filter characterized by allowing the passage of lower frequencies and attenuate the higher frequencies.
High Pass Filter: A high pass filter is a type of electronic filter whose frequency response attenuates the low frequency components but not the high frequency ones, these can even be amplified in the active filters. It should be noted that the high or low frequency is a relative term that will depend on the design and the application.
Band Pass Filter: A band pass filter is a type of electronic filter that lets a certain frequency range of a signal pass and attenuates the passage of the rest.
SINGLE FILTER SCHEMATIC
High Pass Filter, fc = 8kHz
Band Pass Filter fo = 1kHz, BW = 200Hz
Band Pass Filter fo = 500Hz, BW = 100Hz
Band Pass Filter fo = 4kHz, BW = 800Hz
Low Pass Filter fc = 62Hz