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. 2017 May 16;11:265. doi: 10.3389/fnins.2017.00265

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Copyright © 2017 Libey and Fetz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Circuit for control hub and surrounding components. Two Arduinos control the acquisition of the reward event and the subsequent audio feedback signal. Brown lines represent wiring between components. The black squares within the Arduinos represent individual connections to ports. Digital output ports (Dn) were selected for physical convenience and could be interchanged depending on experiment needs. Both Arduinos contain an LED link to extend the embedded Arduino LED feedback system from PIN 13 to increase visibility from further away. This LED was hidden from the monkey's view during experimentation. All hardware was packaged in a simple cardboard box.