Fig. 8From: Additively manufactured nano-mechanical energy harvesting systems: advancements, potential applications, challenges and future perspectivesa CAD model of the air-driven 3D printed EMG energy harvester, b prototype for the experimental testing in the wind tunnel c output voltage with time d RPMs with Reynolds number (Re) e output power with Re f energy conversion efficiency with Re [26] (Images are re-used with the permission of the publisher)Back to article page