Consider to the circuit shown.
![]() Circuit diagram connecting the output of a DISCHARGE NE555 with a capacitor II. |
When you take the circuit into operation, the LEDs light up alternately. Thereby LED2 lights up about twice as long as LED1.
![]() Circuit for connecting the DISCHARGE output of the NE555 with a capacitor II. (Enlarge) |
How does this happen? As soon as you connect the battery...
This is the basic circuit of an astable multivibrator using a NE555. More on that later.