Hello,
Is there a reliable way of getting a trigger signal from a Mac (Mac Mini) when it enters (trigger off) or exits (trigger on) standby mode? The trigger should ultimately switch on my Poweramp (12V nominal required).
With "trigger signal" I mean any reliable signal source that can be converted into 12 V. At the moment I use a 12V line from my PC power supply, that switches on when the PC is leaving standby. This works flawlessly. My keyboard is allowed to wake the PC via USB.
The problem with Mac is apparently (depending on the source) that their USB ports remain powered when entering standby. USB ports would actuall be easiest, since I could just use a DC/DC converter to get 12V.
One solution, with drawbacks, is to set standby to hibernation mode. However, restarting will take long and must be done with the the power switch. This is also some unreliable, sind ever generation of Macs might behave differently.
Another solution I found uses a microcontroller that pings a server on the Mac. When the ping is answered, the trigger output is set on. However, his relys on WIFI and even though it is a neat solution, the complexity is large and a little bit over my head.
Are there any other ways to extract a "I am on now"-signal from a Mac without opening the internal power supply?
Thanks
Florian
Is there a reliable way of getting a trigger signal from a Mac (Mac Mini) when it enters (trigger off) or exits (trigger on) standby mode? The trigger should ultimately switch on my Poweramp (12V nominal required).
With "trigger signal" I mean any reliable signal source that can be converted into 12 V. At the moment I use a 12V line from my PC power supply, that switches on when the PC is leaving standby. This works flawlessly. My keyboard is allowed to wake the PC via USB.
The problem with Mac is apparently (depending on the source) that their USB ports remain powered when entering standby. USB ports would actuall be easiest, since I could just use a DC/DC converter to get 12V.
One solution, with drawbacks, is to set standby to hibernation mode. However, restarting will take long and must be done with the the power switch. This is also some unreliable, sind ever generation of Macs might behave differently.
Another solution I found uses a microcontroller that pings a server on the Mac. When the ping is answered, the trigger output is set on. However, his relys on WIFI and even though it is a neat solution, the complexity is large and a little bit over my head.
Are there any other ways to extract a "I am on now"-signal from a Mac without opening the internal power supply?
Thanks
Florian
After some more evaluating, probably a connection to an arduino via usb-serial interface might do the trick.
The arduino should be controlled via script and react to a constant ping-like signal from the mac.
When in standby, the signal input stops, and the arduino will switch of the trigger.
The arduino should be controlled via script and react to a constant ping-like signal from the mac.
When in standby, the signal input stops, and the arduino will switch of the trigger.
