Experiment 19 - The astable Multivibrator using Timer NE555

Using the timer NE555 you are able to build an astable multivibrator.

Build the circuit shown.

Circuit of an astable multivibrator with timer 555. (Enlarge)

Circuit diagram of an astable multivibrator with timer 555.

If you connect the battery, the LED begins to flash alternately. The oscillation period t is determined by the capacitor C1 and resistors R1 and R2.

A gated astable multivibrator can also be built using the NE555 timer...