EIM Lab-OnThe-Go Manual page 38

LOTG Lab-On-The-Go Manual
Working Principle
The combination of the 555 timer, R , R , and C creates a low-frequency
P 1 1
oscillator that produces a sequence of pulses. These pulses are then
transmitted to a buzzer to produce a sound resembling rainfall, which is
believed to aid in falling asleep more quickly. By adjusting the trimpot, the
frequency of the pulses can be changed to achieve the desired pitch for
the buzzer sound.
Circuiting Setup
36