DESCRIPTION This is a 1×1 inch PCB module with two tiny solar cells, a highly efficient Li-Ion battery charger and with two regulated outputs (3.3V and 1.8V). It harvests enough power from INDOOR light to power a simple BLE or LoRa sensor. The board has castellated vias so it can be surface mount soldered onto …
Sunlight may be free, but transforming it into usable electricity is not. I learned this back in 1965 when I bought some surplus silicon solar cells from dealer Herbach and Rademan (now H&R Company, Inc.). Those 0.75″×0.75″ cells cost around $2.49 each or $19.30 today according to the CPI Inflation Calculator. In 1975, I used …
Transform a 25-Watt Semi-Flexible Panel into a Practical Battery Charger Continue Reading
Introduction Driven by the need for untethered mobility and ease of use, many systems rely on rechargable bat- teries as their primary power source. The battery charging circuitry for th ese systems is typically implemented using a fixed- function IC to control the charging current/voltage profile. The C8051F30x family provides a flexible alterna- tive to …
App note: Lithium ion battery charger using C8051F300 Continue Reading
