T Wacharasindhu and J W Kwon 2008 J. Micromech. Microeng. 18 104016 doi:10.1088/0960-1317/18/10/104016
T Wacharasindhu and J W Kwon
Show affiliationsThis paper describes a novel micromachined energy harvester, which can harness energy from typing motions on a computer keyboard. It converts mechanical energy into electrical energy by utilizing piezoelectric and electromagnetic conversion simultaneously for reciprocating z-directional motions of each key. We have fabricated and tested a micro power harvester chip integrated into a computer keyboard. Experimental results show that the maximum harvested power is about 40.8 µW with a 3 MΩ load from piezoelectric conversion, and 1.15 µW with a 35 Ω load from electromagnetic conversion. The micro power harvesters can be extended into the form of an array.
Issue 10 (October 2008)
Received 5 April 2008, in final form 8 September 2008
Published 29 September 2008
T Wacharasindhu and J W Kwon 2008 J. Micromech. Microeng. 18 104016
W N Ng et al 2008 Nanotechnology 19 255302
Peter J Cadusch et al 2008 J. Phys. A: Math. Theor. 41 035501
J A Davis et al 2008 Nanotechnology 19 055205
John Asher Johnson et al. 2008 ApJ 686 649
Javad N Farahani et al 2007 Nanotechnology 18 125506
YeoHeung Yun et al 2007 Nanotechnology 18 465505
V. A. Acciari et al 2009 ApJ 698 L94
Xiaodong Li et al 2004 Nanotechnology 15 1416
Ch Jooss et al 2002 Rep. Prog. Phys. 65 651