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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: J Neural Eng. 2015 Jul 20;12(5):056002. doi: 10.1088/1741-2560/12/5/056002

Fig. 5.

Fig. 5

Characteristics of solar powered energy harvesters that use RF energy for enabling or disabling operation. (a) Circuit diagram for solar powered harvesters, including a schematic of the RF control logic. (b) A picture of solar powered harvesters with descriptions for each functional block. (c) Transmitted power required to operate the μ-ILEDs as a function of distance. (d) Current-voltage characteristics of the photovoltaic modules (2 solar cells) under illumination with sunlight and with a desk lamp. This module provides ~ 4 V. (e), (f), (h), and (i) Images of wireless operation. (g) and (j) Images of mice with Vertical and Horizontal type solar powered harvesters, respectively.