Figure 1.
Circuit Diagram for Variable Tone Generator
This is a
circuit for a generating a variable tone. The main component of this
circuit is the 555 timer IC, configured as an
astable multivibrator. A 555
configured as such outputs a periodic signal with a frequency
determined by the values of R1, R2, and C1.
By feeding this
555 output to a
speaker as shown in Figure 1, a tone will be produced, the pitch of
which depends on the 555 output frequency.
The tone generated by this circuit is adjusted by varying the value of
potentiometer R1.
See Also: The
555 as an Astable Multivibrator
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