Introduction

• Who

  • @Daniel Puratich architecture, component selection, pm

  • @Shawn Yang schem n layout I think but hasn't started yet

• What

  • interface between Pixhawk GPIO ports and 12v rail to pump, float, and release solenoid

  • extremely simple

    • Proof of Concept

  • Probably a dual channel HSD for 12V?

    • https://www.digikey.ca/en/products/detail/texas-instruments/TPS4H160AQPWPRQ1/6175214

    • I put other options in the schem

• What will not be included,

  • why am i mentioning things that won’t be features?

    • need to keep it simple and safe to get a functional first rev out fast

    • maybe this and other things could be implemented in the future long term in a future project but we just aren’t here yet as a team

  • no buck

    • external buck for 48V to 12V required for the first rev, one will be selected and linked below, plenty of options exist for this

  • no CAN circuit

    • firmware is struggling with CAN Integration 2025

• 3D Model

• Where

  • https://warg.365.altium.com/designs/DD062A54-937F-4D75-99F4-18F43FADAAC4#design

  • hardware/Projects/Water System Controller at master · UWARG/hardware

• External Parts

  • pump:

  • solenoid:

  • float sensor:

  • pixhawk:

  • power supply:

Link to Water Controller Rev 2: Water System Controller rev 2

Engineering