EIM Lab-OnThe-Go Manual page 36

LOTG Lab-On-The-Go Manual
Working Principle
The 555 timer is a popular and versatile integrated circuit first introduced
in 1971. The 555 timer can be used in a wide range of electronic circuits,
such as oscillators, timers, waveform generators, motor control, audio
circuits and others. By configuring the 555 timer in an astable multivibrator,
the frequency is controlled by:
1.44
f =
(R + 2R )C
1 2 1
Circuiting Setup
34