====== Guava - Week of February 13, 2017 ======
**Attended: Tryston, Michael, Kaeo**

===== Updates =====
  * Fixing the Wiki
    * Adding Datasheets and Presentation pages to project details
    * Changing 4th generation -> 5th generation
  * Looking into different types of sensors to include to Guava
  * Going through our previous BOM, found that the pressure sensor (BMP180) has been
  * Started on PCB Schematic design
    * Schematic grid size is set to 50 mil. If space is needed, we can drop down to 10 mil or 5 mil only.
      * This will keep all our parts is uniform and in line when connecting
    * Use same grid size rules for board layout
  * DL-ed newest version of EAGLE (8.0) - to be all on the same software; to avoid unnecessary problems

==== Parts Ordering ====
  * Created BOM and Parts list spreadsheet - started adding the major components
  * [[https://docs.google.com/spreadsheets/d/1EouViGZ5lS5UOof1N6PJVX-Rg2dfYi-Wc7bsWNOyhRg/edit#gid=0|Parts List Spreadsheet]]
  * Microprocessor - ATmega1284P
    * [[http://www.digikey.com/product-detail/en/microchip-technology/ATMEGA1284P-AUR/ATMEGA1284P-AURCT-ND/3440906|Digikey]]
    * [[http://www.atmel.com/devices/atmega1284p.aspx|Atmel Website]]
  * Pressure Sensor - BME 280
    * Previous model (BMP 180) discontinued by vendor Adafruit
  


==== Issues =====
  * Charging Circuit
    * Cranberry or Dragonfruit
    * **Undecided - 470uF * 10 pieces to get the 4700uF **
  * Solar Panel
    * Single or Double
      * Barrel Jack Fittings are different
    * **Decided single - Just need to find the fitting Barrel Jack Connector**
  * 3.3V or 5V?
    * Compatible Sensors - BME and the Pyranometer
    * **Decided 3.3V**
    * BME, Pyranometer, and ATmega are 3.3V compatible
      * BME - Takes 3-5V and steps down to 3V on the chip using its own regulator
      * Pyranometer - 'Should' take an input close to the output ~ 2.5V
      * ATmega - Operating Voltage is 0-5V - at 3.3V the operating freq is 0-10Mhz. We can use a 8Mhz clock like Cranberry

===== Reminders =====
  * PDR is March 4th
  * Do the passives on the parts order next week

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