title: A multi-purpose photocell and touch circuit amplifier.
abstract: A simple and inexpensive multiple channel amplifier based on the TLC374 quad comparator is described. The unit can be used in behavioral studies to amplify photocell signals and as a drinkometer.
mesh_terms: D000669:Amplifiers, Electronic; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design