Guidelines for autonomous data logger design

The guidelines of autonomous data logger equipped with SD flash card are described. Various micro power sources are proposed for implementation of autonomous work, as well as the problem of uninterruptable power supply is discussed and power supply prototype is built powering from custom design Solar panel and Li-ion battery. In the context of data logger´s power consumption minimization, the use of various microcontroller´s internal peripheral devices is described and software code is analyzed.