[arm-allstar] DIY CM119 pin 48 voltage

[James WD0JB]

Doug,

If what you are saying about the internal pull-up is true, then pin37 RegV
should also show the 200mv?  Otherwise the chip is bad?

Also, to clarify, I am testing a bare wire on pin 48. Not connected to
anything and not going through the diode.

Thanks,

James

On Sun, Apr 28, 2019 at 23:27 "Doug Crompton via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> Jim,
>
>  I have blown out COS inputs screwing around. There is a possibility it is
> just the internal pull-up that is bad. You could try putting a 10K from pin
> 48 to 3.3V on the FOB board and see if it shows high and pulls low in the
> view screen of simpleusb-tune-menu - COS Input. Its worth a try before
> throwing out the FOB. Also you are testing this with nothing attached to
> the FOB COS? If you have anything attached it could be pulling it down.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
> On Sun, Apr 28, 2019 at 10:59 PM "James WD0JB via ARM-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > On pin 39 I get the same reading of about 200mv. The radio adapter is the
> > uv82 wiring from hamvoip, however with a npn bjt instead of the mosfet.
> >
> > Thanks for all the help. I've got some more sound fobs on order.
> >
> > James WD0JB
> >
> >
> >
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-- 
73,

James WD0JB