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False triggering of a 555 timer

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by jacbk6121, Mar 6, 2017.

  1. jacbk6121

    jacbk6121 Member

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    I could do this (see attached). But when the pump starts with the manual switch I think the current surge will affect the timer.
     
  2. jacbk6121

    jacbk6121 Member

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  3. jacbk6121

    jacbk6121 Member

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    Well, that made no sense. Too bad you can't delete a previuos thread.
     

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  4. dave

    Dave New Member

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  5. jacbk6121

    jacbk6121 Member

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    If more contacts could be added to the switch I could isolate the timer from the the voltage regulator. Or perhaps these contacts can be replaced by relays.
     

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  6. jacbk6121

    jacbk6121 Member

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    I'm beginning to think I don't need all these contacts on the manual switch. If the MOSFET source is open then the timer cannot affect the pump motor even if it triggers.
     

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