R.V.  Lesovik, A.I.  Artemova, A.V.  Ivanov, A.V.  Sukhanov, 
    Development of Hybrid Power Supply for Wireless Sensor Node Using Alternative Energy Sources,
    Research Journal of Applied Sciences,
    Volume 10,Issue 11,
    2015,
    Pages 719-724,
    ISSN 1815-932x,
    rjasci.2015.719.724,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2015.719.724)
    Abstract: The study describes the main features of the development of a hybrid power supply for wireless sensor node using alternative energy sources. The concept of a hybrid power supply is based on the presence of energy in various forms like vibration, optical or radio frequency energy. The study discuses a block diagram of the hybrid power supply that includes a power control integrated circuit, a micro-energy cell, a piezoelectric vibrating energy harvester, a solar panel, a RF-DC energy harvester, a microcontroller. The study shows the characteristics and waveforms of the power supply that depend on the control signals from the microprocessor and on the charge cell micro-energy cell from the energy harvester. The study also describes the usage of micro-energy cells for harvested energy storage.
    Keywords: Hybrid power supply;micro-energy cell;RF harvester;piezoelectric vibration energy harvester;solar panel;microcontroller