Monostable operation have one stable state and an unstable state. By default, the circuit rests in its stable state but it can be switched over into its alternate state whenever there is an external trigger on its trigger terminal(pin 2) where it will stay for a period of time before moving to its default state. The trigger voltage must be below one-third of the supply voltage(VCC/3).
555 IC Pinout
| PIN NO | DESCRIPTION |
| 1 | Ground |
| 2 | Trigger |
| 3 | output |
| 4 | Reset |
| 5 | Control voltage |
| 6 | Threshold |
| 7 | Discharge |
| 8 | Vcc |
Components Used
- 555 IC
- 10K
- 100uF
- 330R
- 104
- LED
- Push button
The RC components (R1 and C1) determines the pulsewidth using the constant 1.1R1C1.
This implies that changing the value the resistor or the capacitor will result to a change in the duration of the pulse.
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