555 Timer Monostable Circuit Calculator
The 555 Timer Monostable Circuit Calculator calculates the output pulse width of a 555 timer monostable circuit. A monostable multivibrator circuit also known as a one-shot timer is a type of electronic circuit that utilizes a 555 timer IC to generate a single output pulse of a specified duration in response to an external trigger signal. The duration of the pulse is dependent on the values of R and C in the circuit. It has only one stable state and the unstable state is triggered by an external trigger. The 555 timer monostable circuit is used in timing circuits, waveform generation, pulse generation and delay circuits.
Enter the value of Resistor R and Capacitance C
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The circuit consists of the 555 timer IC, a resistor (R), a capacitor (C), a triggering input and a power supply. The resistor is connected between VCC and the common node of threshold (6) and discharge pin (7), and a capacitor is connected between the common node and ground. The voltage across the capacitor acts as input for the threshold and discharge pin. An external trigger is applied to the trigger pin (2) of the timer and is used to control the output of the timer. The reset pin (4) of the IC is connected to the VCC to avoid any accidental resets during the operation. The control voltage pin (5) is connected to the ground via a small capacitor to avoid noise when not in use.
Example: For a circuit with 20kΩ of resistance and a capacitance value of 1000 µF, estimate the signal duration of the output signal.
T=1.1 x R x C = 1.1 x 20000Ω x 1000 µF = 22 s
