Fig. 2: Robo-Matter building blocks: Magbots.
From: Robo-Matter towards reconfigurable multifunctional smart materials
a Swarm of  ~1000 Magbots arranged in an array. b Schematic of the structural design of a single Magbot, which is composed of two charging pins, an LED indicator, a nylon cover, a rechargeable battery, up to six rotatable magnets, a vibration motor, a photoresistor, and a nylon base with tilted brushes (Supplementary Section 1.2.1). c Comparison of a US quarter coin with two Magbots of different chiralities. d Illustration of Magbot rotation mechanism: The vertical vibration of a Magbot driven by the internal motor repeatedly bends the titled brushes, which in turn drive the Magbot to rotate either clockwise (CW) resulted from left-tilted brushes or counterclockwise (CCW) resulted from right-tilted brushes.
