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Capacitor delay question

Discussion in 'Electronic Basics' started by V8TR4, Jul 15, 2003.

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  1. V8TR4

    V8TR4 Guest

    Hello everyone,

    I am powering up sets of relays with a 2803 darlington array. The relay is:

    Zettler AZ821 it is a 5 volt coil and draws 250mw.

    My question is if I place a 47uf electrolytic parallel with the relay will it
    cause a slight delay in the relay coming on? This is what I want to happen. I
    am switching between two lines and want there to be a small amount of time
    between one coming on and the other off.

  2. It will delay the turn off of the relay a little bit, but will have
    little effect on the turn on time. You may need to use two
    darlingtons to drive the two relays, and put the cap on the input side
    of the darlington you want to delay.
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