https://github.com/spaceteam/uhoubolt_pcb_pmu

µHoubolt Power Management Unit KiCad project
https://github.com/spaceteam/uhoubolt_pcb_pmu

Last synced: 4 months ago
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µHoubolt Power Management Unit KiCad project

• Host: GitHub
• URL: https://github.com/spaceteam/uhoubolt_pcb_pmu
• Owner: SpaceTeam
• License: cern-ohl-w-2.0
• Created: 2020-11-16T19:12:23.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2023-09-23T14:54:33.000Z (over 2 years ago)
• Last Synced: 2025-07-03T15:06:56.142Z (12 months ago)
• Homepage:
• Size: 44.7 MB
• Stars: 0
• Watchers: 8
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

          
# µHoubolt Power Management Unit (PMU) Hardware

## Features

- Altimeter capability (barometer, IMU, 2x Low Side Fet)

- 2x Low Side Fet for camera

- 1x Optocoupler for payload enable

- 2x LiIon Charger

- Flash for data logging

- 2x CAN FD

## Known Issues

- CAN Rx and Tx are swapped on CAN1 and CAN2

- No Battery Voltage Sense

- No Pyro Voltage Sense

- Same Connector for 12V and 24V

- No direct hardware arming for primary altimax

- Supply Current Sense is connected to the wrong pin

- Layout: Battery connector is hard to disconnect because it's next to the mounting hole (threaded rod)

- When powering cameras from pyro voltage, their initial current draw is large enough to trigger the overcurrent protection --> all supplied devices might get power cycled when safety pin is pulled (especially bad for ECU, might cause igniters to fire, see ECU known issues)