Detecting Power Off
Posted: Tue Nov 11, 2014 1:47 am
Hello,
I wish to detect (electrically) when a FitPC3 has completed it's power down sequence, that is (in Windows) when one selects "Shutdown".
As the USB power remains on I can't use this and I have tried using the Serial port e.g. RTS voltage, but it remain "Low" after shutdown from Windows.
Is there a test point somewhere on the one of the boards I can use?
If I could piggy-back off the front LED that would be good.
I will be using a photo MOS relay (SY4090) to do the detection.
Thank you,
John Keogh
I wish to detect (electrically) when a FitPC3 has completed it's power down sequence, that is (in Windows) when one selects "Shutdown".
As the USB power remains on I can't use this and I have tried using the Serial port e.g. RTS voltage, but it remain "Low" after shutdown from Windows.
Is there a test point somewhere on the one of the boards I can use?
If I could piggy-back off the front LED that would be good.
I will be using a photo MOS relay (SY4090) to do the detection.
Thank you,
John Keogh