Fig. 1
From: A video based feedback system for control of an active commutator during behavioral physiology
Designed commutator control system. a Schematic diagram of the system. Detailed design of LED surrounding reflectors are shown in inset. b Design of constructed motorized commutator. a: headstage, b: LEDs, c: tether, d: pulley, e: slip-ring, f: DC motor, g: motor control board, h: out-of-focused lens