How much of a current buffer is needed

Discussion in 'General Electronics Chat' started by jerseyguy1996, Jul 28, 2012.

  1. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
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    I have a solenoid water valve that works off of 12V DC. I measured the current while it was connected to a 12V battery and it is about 2.7 Amps. I was going to buy a power supply to run this solenoid and I am wondering how much of a buffer I should give myself....in other words is a 12V 3amp suppy going to do it or should I give myself a bit more breathing room?
     
  2. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
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  3. crutschow

    Expert

    Mar 14, 2008
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    PackratKing and jerseyguy1996 like this.
  4. jerseyguy1996

    Thread Starter Active Member

    Feb 2, 2008
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    Outstanding! Thanks for the guidance!
     
  5. #12

    Expert

    Nov 30, 2010
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    Light bulbs and motors have a "start surge". Simple inductors like solenoids actually resist quick changes in the flow of current so you do not need to compensate for the start surge. It doesn't exist in simple inductors.
     
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