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weatherbox:guava:week_5_-_february_13_2017 [2017/02/16 04:29] dkvilla |
weatherbox:guava:week_5_-_february_13_2017 [2021/09/19 21:59] |
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| - | ====== 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 | ||
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| - | ==== 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 | ||
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| - | ==== Issues ===== | ||
| - | * Charging Circuit | ||
| - | * Cranberry or Dragonfruit | ||
| - | * 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 | ||
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| - | ===== Reminders ===== | ||
| - | * PDR is March 4th | ||
| - | * Do the passives on the parts order next week | ||
| - | |||
| - | [[weatherbox:Guava:meeting_minutes|Back to Guava's Meeting Minutes]] | ||