[arm-allstar] Baofeng 888s and Raspberry Pi 3. Once Pi bootsfully, Baofeng locks in transmit

[Michael Staggs]

Well, there’s my problem. I’m not using a DB25 and didn’t look at that schematic. I put the 10k resistors on PTT and RX where they go on the board, then wired straight from Baofeng to FOB. 

So, it looks like I need a 10k resistor inline connected to the gate of a 2n7000, the source and drain connected to a 1n4007 diode and then the drain going to Baofeng PTT. Is that correct?

I already have the 10k resistor on the Baofeng for RX…. I still need a 10uf capacitor and another 47k resistor before it goes to the FOB? I’m not doing the LED. 

Thanks



Sent from Mail for Windows 10

From: Doug Crompton via arm-allstar 
Sent: Sunday, March 18, 2018 12:55 AM
To: ARM Allstar
Cc: Doug Crompton
Subject: Re: [arm-allstar] Baofeng 888s and Raspberry Pi 3. Once Pi bootsfully, Baofeng locks in transmit

Mike,

 Once I sent that I saw you had the issue in the subject. If the 888 goes
into TX and stays there I would say there is a problem on the PTT line
somewhere. You do need to use a FET and resistor as shown in the schematic
between the FOB and the radio. You can't just connect the output of the FOB
to the PTT of the 888. In rpt.conf the duplex setting should be 1 -
duplex=1.


*73 Doug*

*WA3DSP*

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


On Sat, Mar 17, 2018 at 10:22 PM, "Michael Staggs via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> I’m sure I did something wrong. I wired the chip up COS and PTT to the
> pins as shown here:
>
> http://www.garydion.com/projects/usb_fob/
>
> I wired the left and right jacks up according to here:
>
> https://hamvoip.org/hamradio/usb_fob_simple_modification/
> images/DSC02054.jpg
>
> And I wired the Baofeng 888s up according to these instructions:
>
> http://crompton.com/hamradio/baofeng888/New-888-mods.pdf
>
> I used the RPi2-3 Image Version 1.5rc16 image
>
> Sent from Mail for Windows 10
>
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