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Source for SMD relays

Discussion in 'General Electronics Chat' started by ljcox, Nov 8, 2017.

  1. ljcox

    ljcox Well-Known Member

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    Thanks Mike,
    18 ms is a bit too long for my purpose.
    So what I'm considering is to connect the Xtal to the TMR1 oscillator terminals and connect the output (T1CK1) to the external clock input OSC1 as shown in Fig 14-2.

    This is very easy to do on my PCB as the pins are adjacent. Do you see any flaws in this idea?
    Thanks for the ongoing interest.
    Len
     
  2. Pommie

    Pommie Well-Known Member Most Helpful Member

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    I thought the timer1 oscillator could only work at low speed (32kHz). Could you use two crystals? A 32k and 20M would provide the best of both worlds but does tie up 4 pins.

    Mike.
     
  3. ljcox

    ljcox Well-Known Member

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    Thanks Mike,
    I can have the 32 kHz drive both. The device I'm designing inter-works with relay systems, so there is no need for high speed.

    Len
     
  4. dave

    Dave New Member

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  5. ljcox

    ljcox Well-Known Member

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    Thanks for the suggestions.
    After considering them & a host of options, I decided to not use relays.

    I'll use 2 16F1708 PICs. These have 20 pins, IOC on all i/o & an internal oscillator.
    Len
     

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