First version of mainboard schematic

A first (draft) version of the mainboard schematic is available here:
https://rgb-clock.googlecode.com/svn/trunk/pcb/RGBClock/Mainboard.pdf

Eagle library parts

I'm surprised to learn that creating Eagle library parts is actually quite easy; see this tutorial:
http://www.msilverman.me/2010/06/creating-a-new-device-in-eagle/

And it is even faster when you copy a existing symbol/package. In my case the library for the Si4735-D50 FM receiver...

Schematics of PWM LED driver prototype board (PCA9685 and ZXLD1362 as main components)

I have uploaded the schematics of the PWM driver prototype board. It was just a test board to get started with Eagle software. 
You can view the schema here. I'll start the schema entry of the other boards in the next days; all files will be available on the source page.

Software development

Continuing the software development of my alarm clock. I have added the automatic detection of units (display units, light units) via the I2C bus. I will start with the alarm function (main feature :-))
When this is complete, i'll start redesigning the new PCB's:
- Main unit (FM Radio, RTC clock, I2C and Audio buffers)
- Display units (Display, Amplifier, Touch button sensor, Licht sensor,...)
- Light Units (PWM control, LED driver)

Cleaned up prototype

Started writing the actual software

Alpha version of the hardware has been a little bit cleaned-up.
Started to write the real software. All previous software was just about testing hardware. I'm now writing the application as I want the application, re-using the previous test classes.

Looking nice ! Keyboard is working; i'm able to make the difference between short and long keypresses. Accuracy of the MPR121 is actually (after some tweaking) very good.

Connected the light to the keyboard events; i'm now able to control the (RGB) Leds; PWM dimming !
Radio (FMReceiver and Amplifier) is also connected to these keyboard events. Coded some shortcuts, but i'm able to control the volume of the amplifier.

Next:

• Add more features to the Light: slow startup of the light intensity (wakeup with light). Manual power on and off; make it less abrupt (need some sort of fast dimm off, dimm on.
• Clean-up the radio & amplifier code
• Connecting the display classes ...
• Actual writing the alarm settings & processing....
• ....

Just created this blog, and already some news: The first prototype of my alarm clock is ready. It is still an early prototype, but almost all hardware is present:

• Raspberry Pi
• RGB PWD control (PCA9685 + ZXLD1362)
• I2C bus extender (P82B96)
• Radio circuit (Si4730)
• Audio line buffer (DRV612)
• Amplifier (TPA0172)
• LCD Display (Newhaven Display NHD-16032AZ + MCP23017)
• Light sensor (TSL2561)
• Touch button sensor (MPR121)

As you can see; everything is working ! But still; lots of work to do:

• Create all PCB's
• Actually writing the software
• Testing... lots of testing....
• Add an extra IO Expander (driving relay's)