Exposing attin85 pins directly to external lines can be risky. It would be better to tie the tx_line (it goes high on transmit) to a 2n7000 gate and use the drain as an open / close ptt switch.
On Sun, Apr 16, 2023, 11:25 PM Rafael Diniz <rafael@...> wrote:
If you don't want to use Raj option, other option is to use the ATTiny85
port 6 in order to have independent control (just send the info to the
ATTiny85 via i2c).
Rafael
On 4/16/23 13:21, Ashhar Farhan wrote:
> It is best not to tap this off the raspberry pi line. Perhaps, we can
> use the usb port to signal this?
> - f
>
> On Sun, Apr 16, 2023, 12:54 PM Petr Ourednik <indians@...> wrote:
>
>? ? ?Yes Farhan, ptt out would be important feature as the output power
>? ? ?of V2 seems to be enough to exciting standard amps.
>
>? ? ?- P
>
>
