桂花蒸

[Verified] Raspberry Pi Single Lithium DC UPS [Low-Cost Solution]

Overview

Use mobile power supply for power supply, and the power will always be lost when plugging or unplugging the input end.

This solution will not cause instantaneous power loss when switching between primary and secondary power supplies.

Although the whole board is not printed, there is no problem in the connection test between the modules.

A friend suggested that this is the official power switching circuit of Raspberry Pi. I checked the schematic diagram of Raspberry Pi 3B and found this circuit.

It would be more convenient to add a switch to the output part

Design Files

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Update:2025-08-09 16:19:30

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