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Small solar panel charging curve on 2 sunny days

A project log for Solar powered Bluetooth Thermometer with Supercap

This projects provides hardware & software modifications to run the Xiaomi Thermometer LYWSD03MMC with a supercapacitor and mini solarpanel.

MartMetMartMet 02/25/2021 at 20:520 Comments
The devices is placed on the balcony and charged with a small solar panel BR-243318C.


In direct sunlight the small version of the solar panel gives max. ~3.45V (- 0.3V of the Ge-Diode)



In ambient light the voltage is about 2.5V so the supercapacitor is not fully used .... this solution is suboptimal for indoor use.

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