![]() In monostable mode, the circuit generates only single pulse when the timer gets an indication from input of the trigger button.The output signals of low and high states signals are controlled by reset and activating the input pins. In bistable mode, the circuit produces 2-stable state signals that are in low and high states.There are three modes of operation of the Timer IC, which are bistable, monostable and astable mode. Open collector output to discharge capacitor Provides access to the internal voltage dividerĪcts as the threshold as to when to stop the timing interval Is driven to ~1.7V below Vcc or to ground ![]() The pin diagram of the 555 Timer IC is given below. ![]()
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