External Power Switch for BBB

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jdoscher
 
Posts: 124
Joined: Tue Jul 22, 2008 12:36 pm

External Power Switch for BBB

Post by jdoscher »

I'm looking at building an external enclosure for my BBB and I'd like to be able to safely shutdown and power off my BBB using an external switch. I don't see any examples of this being done before, does anyone have any ideas on how to go about this? Ideally I'd simply have an LED for power status and a momentary switch for shutdown, then a toggle switch for hard power on/off. Any ideas?

redFrik
 
Posts: 3
Joined: Mon Jan 06, 2014 8:59 am

Re: External Power Switch for BBB

Post by redFrik »

the new official debian image for bbb includes a feature for safely starting and shutting down the bbb. http://beagleboard.org/latest-images
just press the power button (S3) to boot and again to begin the shutdown process. note that shutting down takes about 25sec.
a great thing is that this button (S3) is also available via pin P9_9. so simply connect your own button to that pin and ground it to boot/halt the system.
the indicator led you can connect to the 3v3 rail (P9_3) with a resistor to ground, and it'll show you if the bbb is on or not.

previously i did the same thing like this... https://github.com/redFrik/udk10-Embedd ... top-button
but it wasn't nearly as easy or flexible.

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