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. 2020 Feb 15;20(4):1063. doi: 10.3390/s20041063

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Test results of the S-TENG power generation performance. (a) Curve showing the variation of the transferred charges over the vibration frequency; (b) Curve showing the variation of the output voltage over the vibration frequency; (c) Curve showing the variation of the output current over the vibration frequency with different resistances; (d) Curve showing the variation of the output power over the vibration frequency with different resistances; (e) A picture showing the LED (light-emitting diode) lighted by the S-TENG; (f) charging curve of the capacitor (50 V, 2 μF) with the load resistance (1 k) in 8 Hz.