Figure 2.

Building the Arduino controller

(A) Wiring diagram of the controller.

(B) Materials needed: BNC screw connectors, Arduino Nano, Screw terminal board, DB9 connector, and wires.

(C) Attaching wires using the screw terminal board.

(D) Completed Arduino controller showing connections to valve control, camera, and LEDs.

(E) Image of Arduino controller positioned on the Valvelink valve controller.

(F) Top view of Valve controller with mounted Arduino Nano and optional LED controller for optogenetic stimulation.

(G) Velcro placed on the bottom of the Screw terminal board to attach securely to the Valvelink valve controller.