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The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation and oscillator applications. The part is still in widespread use, thanks to its low price and ubiquity. The 556 timer is simply two 555 timers in a single package.
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switching off 555 timer with trigger button
Yes it's possible using logic gates:
It will reset only if the LED is ON and you press the trigger button again.
Note: The extra inverters and the AND gate are for rising edge detection (When you rel …