The modes of the 555
Note: For changing behaviour the Capacitor connected to #6 should be used while the 10nF one connected to Control (#5) should be left unchanged.
1 - Astable
Timing through the Capacitor:
0.1 Hz - 100 uF
1 Hz - 10 uF
10 Hz - 1 uF
100 Hz - 100 nF
1 kHz - 10 nF
10 kHz - 1 nF
100 kHz - 100pF
2 - Monostable
Timing through the Capacitor:
100 uS - 1nF
1 mS -10nF
10 mS - 100 nF
100 mS - 1 uF
1 S - 10uF
10 S - 100uF
3 - Bistable
4 - Schmitt Trigger
Credit: Wikipedia (555 Timer IC)
For more information please read their article as it's very informative and this is only and implementation of what's found there.
