23-11-2024, 05:41 PM
Hi All,
I am building my 1st QO-100 station and I designed it in a way that the PA's power is going through a relay.
I am interested in where to look in the Remote SDR's code in order to inject dedicated RPI's GPIO voltage level change when TX is ongoing.
What I want to achieve is to cut-off PA's power when there is no transmission in Remote SDR.
Other option would be to add a toggle switch somewhere on GUI to change the state of a dedicated GPIO. With that I would arm TX path with power when I plan to transmit.
3rd option would be to use PWM output from RPI. With a bit of filtering on the relay side I would turn the relay on only when certain PWM signal would appear. That would prevent reacion on voltage steady states.
If anyone has any idea please drop here a line or two.
Thanks!
73
I am building my 1st QO-100 station and I designed it in a way that the PA's power is going through a relay.
I am interested in where to look in the Remote SDR's code in order to inject dedicated RPI's GPIO voltage level change when TX is ongoing.
What I want to achieve is to cut-off PA's power when there is no transmission in Remote SDR.
Other option would be to add a toggle switch somewhere on GUI to change the state of a dedicated GPIO. With that I would arm TX path with power when I plan to transmit.
3rd option would be to use PWM output from RPI. With a bit of filtering on the relay side I would turn the relay on only when certain PWM signal would appear. That would prevent reacion on voltage steady states.
If anyone has any idea please drop here a line or two.
Thanks!
73
Grzegorz SP6HFE