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raspberrypi_ups_hat

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@gvoigtlaender

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KiCad projectAll 15 files, ready to open in KiCad365 KB3D modelThe board with its parts, for an enclosure (GLB)6.2 MB
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README

RaspberryPi_UPS_HAT

RaspberryPi UPS HAT, LIPO, Fan Control, I2C

Project goals:

  • provide backup battery (LiPo 3.7V) with I2C status interface
  • small footprint to integrate into given RaspberrryPi case (LABISTS Starter Kit)
  • integrated fan control (temperature based)
  • onboard programmer interface (ISP)
  • I2C based RPI ups service for Battery supervision, logging and shutdown (systemd, python3, smbus)

Used items:

  • Attiny 841 CPU
  • LTC4054 LiPo Charger
  • MT3606 Step-Up (LiPo > 5V)
  • MIC5219 LDO (5V > 3.3V)
  • USB Type-C connector
  • resistors, capacitory (SMD 0805)

Schematic:

PCB:

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