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Free download 555 timer pinout11/9/2023 The power supply voltage that might affect the operation of the timer. This capacitor serves to level out any fluctuations in In most 555 timer circuits, this pin is simplyĬonnected to ground, usually through a small capacitor, about 0.01 It is momentarily grounded, the 555 timer's operation is interruptedĪnd won't start again until it's triggered again via pin 2.ĥ is the control pin. Must be connected to the supply voltage of the 555 timer to operate. This is an active low input, just like the trigger input. This pin can be used to restart the 555 timer's This may be an LED, in the case of a 555 timer LEDĤ is the reset pin. The output pin is where you would connect the load that you want theĥ55 timer to power. The output is either low, which is very close toĠV, or high, which is close to the supply voltage that's placed on pin When the 555 is triggered via pin 2, the output on pin 3 goesģ is the output pin. The timer starts when voltage on pin 2 drops to below 1/3 of the supply The trigger is an active low trigger, which means that It works like a starter pistol to start the 555
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