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Olin Lathrop
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I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with ana NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from thea output pin thru a emitter follower.

I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with an NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from the output pin thru a emitter follower.

I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with a NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from a output pin thru a emitter follower.
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EM Fields
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I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with aan NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from athe output pin thru a emitter follower.

I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with a NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from a output pin thru a emitter follower.

I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with an NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from the output pin thru a emitter follower.
Source Link
Olin Lathrop
  • 315.1k
  • 36
  • 441
  • 928

I looked at it only briefly since the 555 timer pins were just numbers without explanation. However, 2 things jumped out:

  1. The pushbutton is permanently shorted. That of course would cause the circuit to ignore any pushbutton state changes.
  2. It looks like you might be trying to power up the chip with a NPN emitter follower. That can't work. The output voltage of the emitter follower will always be less than what you are driving the base with. Since the chip can't produce a voltage higher than its own power voltage, you can't drive that power voltage from a output pin thru a emitter follower.