Tag: solar

Simple Photovoltaic Charger – Solar Power module with Back-Up

A simple photovoltaic (PV) to Li-On battery charger project is described here. At low VCC voltage, PV current flows to both the system at VCC and the battery. When VCC reaches the programmed float voltage (4.1V with ADJ floating), the LTC4071 shunts excess current not used by the...

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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...

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