Spehro,

Because I am feeling humbled by your knowledge, I have to ask a simple
question, and please don't chastise me in public for asking: Where would
I put a simple LED and current dropping resistor in this circuit so that
it would light when there is continuity, without affecting the existing
functionality?

Thanks for your help,

--->Rob

(And no, I'm not trying to be a smart ass :)

On Sat, 2003-07-26 at 15:27, Spehro Pefhany wrote:
>
>                        +12VDC o
>                               |
>                              .-.
>                          5R0 | |                       Vdd
>                              | |
>                              '-'                       o
>                               |                        |
>                               |                       .-.
>                               |                       | |10K
>                               |                       | |
>     Logic level power MOSFET  |       10K             '-'
>     eg. IRLZ34NS              |       ___              |
>                               +------|___|---+     - --+---o
>                               |              |     |
>             1K0            ||-+              |  ||-+    CMOS in
>              ___           ||<-              |  ||<-
>         o---|___|-----+----||-+              +--||-+ 2N7000
>                       |       |            \ |     |
>     CMOS out         .-.      |              - \   |
>                 100K | |      |       5.1V  / \    |
>                      | |      |             ---    |
>                      '-'      |              |     |
>                       |       |              |     |
>                      ===     ===            ===   ===
>                      GND     GND            GND   GND
>

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