Subsea Light Control

• Erin finished testing circuit
• Next week tasks:
  • Connect relay input pin to teensy to allow for control
    • firmware?
    • testing?

Jetson Buck/boost Converter Fix

• Option 1: Fix current buck/boost converter
  • If we hold the on off button it should fix the buck converter from not outputting voltage upon power up

• option 2: Different buck converter
  • use this one

• For either option we should desolder the screw terminals and solder power wires onto board using strain relief
  • we bough a bunch of strain relief clips last semester
• Next week tasks:
  • Try getting the existing buck/boost converter in the sub to output voltage on power up
  • Re-terminate input and output to buck/boost convert

Battery Tubes

• Confirmed that batteries work to power sub

• Need to test drain over time

• We should implement some way of balancing the cells while inside the tube

  • In the current configuration we will need to take batteries out of
  • Option 1: parellel charge the batteries each time we are done
  • Option 2: implememnt BMS IC to constantly balance and monitor batteries
    • https://www.mouser.com/ProductDetail/Texas-Instruments/BQ7692003PWR?qs=%2Fd%252BFzHvH4c1ZYX6sbOSR8w%3D%3D

• Confirmed layout

  • Each battery charges separately in tube

    • i.e. Y-connection will occur in main body of sub

    

• Next week tasks:

  • source necessary connecotrs to convert from balance lead from the battery to water proof connector and back to balance lead