Photovoltaic Cell Battery Charger / Solar Cell Li-Ion Battery Trickle Charger with MPPC

https://www.electronics-lab.com/photovoltaic-cell-battery-charger-solar-cell-li-ion-battery-trickle-charger-with-mppc/

This is a tiny module that allows users to charge small Li-ion batteries, CR2032 or equivalent, from a low power source such as a small photovoltaic cell. The project consists of the LTC3105 step-up DC-DC converter chip which features Maximum Power Point Control (MPPC) and 250mV start-up voltage which enables operational directly from low power, […]