EVE - SmartLight

You all know the saying about "The early bird ...".
But for most people its hard to get up in the morning; especially during winter when its dark outside.

The EVE SmartLight is a smart light alarm clock controlled by a Raspberry 2 and controllable by a 7" touch screen display.
EVE simulates a sunrise by fading up the light even BEFORE its time to wake up in a smooth way so you can wakeup relaxed and rested while a singing birds sound comes to your ears.

Software

Eve is controlled by a custom JAVA FX application using PI4J and WiringPI.

The software can be found here: https://github.com/NeoP5/eve-smartlight

Electronics

All electronics are kept to be simple.
Please see the instructions sections for details and a complete shopping list.

Future

This is version one of EVE. Lots of additional feature can (and will be) added in the future.

Such as

• weather information
• integration of Eclipse SmartHome /OpenHAB for full home automatization and control of other smart devices in your home (switch on the coffee machine directly from bed ;)
• make LEDs controllable via network to be controlled by other devices
• Internal camera to be used as security camera and motion detection system
• with camera: get alerts when on vacation
• turn on light when movement is detected during the night (use full for going to the toilet ;-|

Updates

• small update to the case design; removed whole for the control buttons of the display. They will be added later.

Printing Instructions

The print is done using white or transparent PLA to let the LED shine through.

• 50 mm/s
• 0.2 mm layers
• no support required

Electronics

The following electronic components are used:

• Raspberry PI 2 (a B model will also work but to have enough power for future updates)
• Small WIFI dongle
• 12V / 60 Watts external power supply from laptop
• push-in connector matching to the power-supply
• 12V/5V 15Watts DC/DC stepdown converter for powering the RasPi
• 12V LED Stripe
• TIP120 - NPN, Darl, 60 V, 5 A, 65 W - TO220 Transistor
• two small speakers I had on stock; aprox 34mm diameter
• white power-switch 19x22mm casing, snap-in
• 7" touch display and controller from pollin.de (LS-7T)
• short flexible HDMI cable
• old micro USB cable
• some cables
• some hot glue
• plastic foil for isolation

Preparation

In order to work correctly we need to install the Raspberry first.
I assume that you know what to do and how to work with Linux; if not check on the web for some tutorials or check my website frequently as i will post some more detailed instructions there the next days.

• install Raspberrian on the SD card; see for tutorials on the net
• install wiringPi (it is used by PI4J to control the LED dimming)
• install Oracle Java 8
• configure Raspian to work correctly with the display (e.g. resolution, force_hdmi=true, overscan=true, etc..)
• install & configure the touch driver and calibration software; there are lots of walk through on youtube how to do this
• configure your PI to connect to the WIFI when powering on
• download and compile the Java-Application; install/copy it on/to the Raspberry

Assembly

Before assembly make sure everything works fine.
Connect all components on a test region first to check functionality.
Make sure to install the software and configure the Raspberry Pi first before putting it to the case.

1. insert the 7" touch display to the case
2. insert the display controller circuit board to the controller mount
3. insert the controller mount into the case use some hot glue to fix it a bit
4. connect the display to the display circuit board
5. insert the connector for the power supply to the case and screw it tight; insert the switch as well as the speakers
6. solder a cable from the power supply connector to switch
7. mount the raspberry onto the base plate; use 4 small points of hot glue to fix it; so you can get it of once you need it
8. solder a cable from the switch to the DC/DC converter IN pins
9. on the DC/DC converter OUT pins we solder the micro USB cable (maybe cut of the USB end of a USB-to-micro-USB cable); put the other end into the Raspberry PI
10. put the HDMI cable from the Raspberry to the Display
11. connect the USB cable for the touch controller into one of the Raspberry´s USB ports
12. If not yet done put the WIFI dongle into one of the USB ports as well
13. last step is to connect the Raspberry, the LED-Stripe and the power using the TIP120 transistor. Connect pin 12 of the Raspi to the first pin of the TIP120. The second pin of the TIP120 to the LED Stripe´s ground and the third pin of the TIP 120 to the ground pin on the switch. Additionally connect the plus pin of the LED stripe to the plus pin on the switch.
    14 connect the speakers to the Raspberry using a 3.5 mm connector (if they are not loud enough you will need to add a small 5V amplifier chip in between).