[arm-allstar] DIY CM119 pin 48 voltage

[Doug Crompton]

im,

 Yes I guess I missed that. If the 5V into the chip is there and 3.3 reg
out is not there then the chip is bad.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*

On Mon, Apr 29, 2019 at 1:45 PM James WD0JB <James.WD0JB at gmail.com> wrote:

> 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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>>
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>>
> --
> 73,
>
> James WD0JB
>