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The 555 timer is a commonly used integrated circuit that can be configured to produce a square waveform output. In Astable configuration the output will be a free running squarewave output. In Monostable mode the output will be a single high pulse generated for a single input event. This calculator will determine the pulse width of the output based on the resistance and capacitance values entered.

CHOOSE CONFIGURATION
R1 RESISTOR VALUE
C1 CAPACITANCE VALUE
FORMULA
OUTPUT PULSE DURATION
_____ MILLISECONDS V cc R 2 R 1 S 1 C 1 C 2 8 (VCC) 4 (RESET) 7 (DISCHARGE) 6 (THRESHOLD) 2 (TRIGGER) 3 (OUT) 5 (CTRL V) 1 (GND) TRIGGER PULSE (S1) OUTPUT PULSE