Here I offer some research equipment designs and related resources. Although most of my efforts are dedicated to conducting behavioral research, I often have to design equipment for my experiments. When I am able, I like to document these designs and make them available for others.
I created an open-source syringe pump for my research in animal behavior. I designed the pump to precisely deliver liquid reinforcers to animals and to be easily controlled from a microcontroller interface such as the Propeller Experiment Controller. The pump costs about $173 and can be easily assembled from ServoCity's modular Actobotics line. Only three specialized 3D printed parts are needed. I provide a full parts lists, mechanical and electronics assembly instructions, and programming suggestions.
Also, see my page of recommended vendors for electronics and apparatus related materials.