This is another update on my adventures with the Wandboard and the
Community Squeeze. I have a first project (still ongoing) that is
documented here:
http://www.communitysqueeze.org/image_gallery.jsp#Pascal_Hibon 

Due to the fact that the Community Squeeze is working great I got some
ideas for two other projects for this player in my house. Both of these
projects require a Squeezebox that will be mounted behind the sealing
driving in-ceiling speakers through an amplifier which also resides
behind the ceiling. The Community Squeezebox needs to switch the
amplifier on and off based on the power state of the player. So there
was a need for a bit of additional electronics and a custom Lua script.
The Lua script is driving GPIO_19 on the Wandboard. GPIO_19 simply
drives an SSR (Solid State Relays) which powers the amplifier on and
off. Below are some pictures of the project:

I use a 3.5 mm stereo jack for the trigger output. The two resistors and
the transistor are soldered around the jack connector: 

'[image: http://img809.imageshack.us/img809/8435/triggeroutconn.jpg]'
(http://imageshack.us/photo/my-images/809/triggeroutconn.jpg/)


This is how it connects to the Wandboard:

'[image: http://img59.imageshack.us/img59/9546/triggeroutboard.jpg]'
(http://imageshack.us/photo/my-images/59/triggeroutboard.jpg/)



And here it is all assembled:

'[image:
http://img441.imageshack.us/img441/3083/triggeroutwandboard.jpg]'
(http://imageshack.us/photo/my-images/441/triggeroutwandboard.jpg/)

For those of you who are interested the schematic is attached. And I’ll
post the Lua script and some documentation to install it in a later
post. Maybe JackOfAll can put it all up on the Community Squeeze
website.


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