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Michael Clemens 2023-01-16 00:22:19 +01:00
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content/post/automatic-antenna-switch.md
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@ -54,7 +54,7 @@ The IC-7300's ACC port provides a 13,8V output pin which is specified to be able
Furthermore the WSPR transmitter needs to be powered off as soon as the IC-7300 has been switched on. For this a simple 12V relay board (~3,50 EUR) will also be connected to the 13,8V output pin of the IC-7300's ACC port. The WSPR transmitter is powered via a Micro-USB cable from which the red wire will be cut and wired to the relay board so that it is connected to the pins of the relay that are closed when no voltage is applied to the relay. This way the WSPR transmitter will be powered with 5V via an external power adapter when the IC-7300 is powered off and be shut down when the IC-7300 is powered on.
### Automatic Switching of the remote antenna switch
### Automatic switching of the remote antenna switch
A cheap battery monitor (~11 EUR) - which are normally used to protect batteries from deep discharge by switching them off when a certain voltage as been reached - will be connected to the BAND pin of the ACC port. One can freely define the cut off voltage in the variant I've purchased. Depending on the selected frequency band, a voltage of between 0 and 8 volts is applied to the BAND pin. I've configured mine to trigger at a voltage of 4,5V since the value for 20m is 4V and the one for 40m is 5V.