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In a 555 timer circuit, what does the threshold pin do?

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Question: In a 555 timer circuit, what does the threshold pin do?

Options:

  1. Resets the timer
  2. Sets the output high
  3. Detects when the capacitor voltage exceeds a certain level
  4. Controls the timing interval

Correct Answer: Detects when the capacitor voltage exceeds a certain level

Solution: 

The threshold pin detects when the capacitor voltage exceeds 2/3 of the supply voltage, which affects the output state.

In a 555 timer circuit, what does the threshold pin do?

Practice Questions

Q1
In a 555 timer circuit, what does the threshold pin do?
  1. Resets the timer
  2. Sets the output high
  3. Detects when the capacitor voltage exceeds a certain level
  4. Controls the timing interval

Questions & Step-by-Step Solutions

In a 555 timer circuit, what does the threshold pin do?
  • Threshold Pin Functionality – The threshold pin in a 555 timer circuit is responsible for detecting when the voltage across the timing capacitor exceeds 2/3 of the supply voltage, which is crucial for determining the output state of the timer.
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