>At 16.18 2011.11.13, you wrote:
>>Electron wrote:
>I would like to simulate it, but after 3+ hours (really!) I still can't ge=
t a
>working voltage/current controlled switch, or a relay, to work with LT=20
>Spice. :-(
>
>The symbols are there, but it just doesn't work. I watched and re-watched =
the
>video many times, but I couldn't manage to get it to work.
>
>The model should be this:
>.model MyRelay SW(Ron=3D1 Roff=3D1G Vt=3D3.0 Vh=3D.4)=20
>
>I get the symbol, but I can't make the model work (the best I reached was =
the
>error message Can't find definition of model "NC_01".
>
>I then gave up and decided to simulate the reed using a MOSFET.. but it do=
esn't
>look like the real thing. :(

OK, at the fifth hour I managed to make it work. I had to use the sw symbol=
,
not the relay one. :/

Now it's the turn of subcircuits. :P


At 18.14 2011.11.13, you wrote:
>The cap doesn't have to go directly across the relay contacts - you
>could still have a pull-up to Vdd and then at the node where you would
>normally attach the PIC input pin, instead put a single pole RC LPF
>between the pullup+switch node and the PIC pin. This way, the reed
>relay never sees a high current pulse but you still slow down the edge
>as far as the PIC sees it so that the PIC will not respond to
>microsecond pulses but will respond to millisecond pulses (like the
>relay closure).
>
>Sean

OK, logical, pullup to reed, resistor to PIC which has the cap in parallel =
to
its input. Reed never stressed, cap near PIC input pin.. that shall work be=
st.

Cheers,
MarI/O

--=20
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