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5V solar voltage stabilizer

Overview

Circuit Board Description:
This power supply chip uses PW5300A to regulate the voltage of one or more 5V solar panels, outputting via USB. Self-verified, it can power a power bank and a small fan. It includes a 40-degree normally open temperature switch to control a 5V 4010 cooling fan. Next to the fan is a 5V to 3.3V converter, which can supply 5V and 3.3V power to a microcontroller.
Resistor R5 (0Ω) is optional; if a temperature control switch is not available, it can be soldered to power the cooling fan.
M3*28 screws and XH2.54-2p terminals are used.

The small fan barely moved in the dark!
After testing under bright sunlight, this rechargeable power bank
project has been open-sourced to the LCSC open-source hardware platform OSHWHub and is participating in the Summer Electronics Fun Collection event. Thanks to LCSC!

Design Files

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Update:2026-03-26 12:24:49

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