How does connecting a capacitor between pin 5 of LM555 and GND reduce the noise when the signal goes from LOW to HIGH in an Astable 555 timer? : r/AskElectronics
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What will happen in a 555 timer when a Pin 5 is given an external voltage? - Quora
What will happen in a 555 timer when a Pin 5 is given an external voltage? - Quora
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How do I use pin5 to control duty cycle of a 555 based PWM? - Electrical Engineering Stack Exchange