Authors

Attended: May Chen, Kristie Lee, Jon Liang

Documentation for testing plans
- Create a checklist for quality assurance (Google Sheets)
  - One checklist for an unpopulated PCB
  - Another checklist for a populated PCB
Documentation for Apple
- Purpose
- Features
- How to test features
- Ranges for test values
Verification board
- Firmware
- Plugs in to unit test Apple
  - Components powered on
  - Checks MCU programmability
  - Checks I2C functionality
    - And possibly other functions of MCU

What to look out for during continuity checks
- Make sure components that need power are connected to power
- Check power planes for short circuits
- Check other connections for short circuits
- Check for properly connected signals
  - Incorrect wiring
  - Thin traces
Populated board
- Two ways to populate board
  - Power fewest but most critical components
  - Populate entire board and test everything at once
- How to test a populated board
  - Verify with circuit schematic
  - Check component's voltage values
    - Sensors should match datasheets
  - Check reference planes are correct
  - Check that it is grounded properly
Verification (after board has been populated)
- Check MCU programmability (firmware)
  - Read/Write/Save/Run, etc. functionality
  - Unit test I2C (or PWM)
- Then, upload full script
Verification board
- Purpose: So hardware can test their board without handing it off to firmware
- MCU on the verification board will program Apple's ATMEGA
  - Firmware script will tell the verification board to program whatever it is connected to
  - Will check I2C (or PWM or whatever function WeatherBox is using)
- We will not be doing hardware/voltage checks on the verification board
  - Too complex; basically going into power systems and creating a multimeter with a voltage reading sensor
- We will not be doing power measurements
  - Theoretical approach: take source and all other components' characteristics and calculate over time
  - Experimental approach: power boards and see how long it lasts (we know the board lasts several days so this is not very feasible)