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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: J Neurosci Methods. 2018 Oct 17;311:170–177. doi: 10.1016/j.jneumeth.2018.10.022

Figure 1. Design of a low-cost open-source photometry control system.

Figure 1.

A, Schematic of experimental design in which the photometry system delivers fluorescence excitation light, measures fluorescence emission and passes a digitized signal to the computer. B, Individual components of the photometry system include optical components (left, dichroic mirrors, fiber couplers), photometry control box (center) and digitizer for recording (right).