Practical Electronics/Frequency Modulation/555
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This page may need to be Frequency modulation is the process of modifying the frequency of one signal according to another. This is the basis of FM radio, which modulates a base frequency with another signal.
Basic frequency modulation can be achieved with a 555 Timer IC. This circuit uses the voltage at the "Control Voltage" pin, Pin 5, to alter the frequency of the output.
