diode question

Discussion in 'General Electronics Chat' started by rfhelp, Mar 23, 2009.

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  1. rfhelp

    Thread Starter Active Member

    Mar 23, 2009
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    Hi all, new in town,

    I am wanting to setup an rfid module with 12vdc output. I am told the automotive relays are to much for the module and will eventually burn it out. I am advised to use a 5a pc relay because of its lower power and use that to power the automotive relay.
    so for the diode protection I have been advised to use a 1N914 by one and a 1N4001-4007 from another dude. I need a tie breaker opinion.

    On another note, the rfid is a momentary pulse, anyone know how I can activate the relay so it stays on with just one pulse? for security reasons I would need to rest the system when power is turned off so it cannot be powered up again without the rfid recognition. (I am thinking a secondary rocker or toggle switch)

    Thanks All.....
     
  2. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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  3. beenthere

    Retired Moderator

    Apr 20, 2004
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    It should, indeed.
     
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