An Inexpensive Direct‐Current Amplifier

Tools for physiology labs: an inexpensive high-performance amplifier and electrode for extracellular recording.

The cost of electronic equipment can be a critical barrier to including neurophysiology exercises in biology teaching programs. We describe the construction of a simple and inexpensive AC preamplifier with performance comparable to that of commercial products. The amplifier consists of two integrated circuits in five stages: differential input, fixed gain, variable gain (100 or 1000), low-pass ...

An inexpensive blackbody model

A blackbody is a fundamental concept in thermography. A perfect model of blackbody is characterized by emissivity =1 which is difficult to be obtained. There are black body simulators which are being used for calibration of infrared devices. Commercial solutions of blackbody simulators are based on mathematical models of cavity or surface blackbodies and their emissivity is closer to unity e.g....

An inexpensive, accurate ''injection gun''.

An Inexpensive Light Stage Dome

This article describes a process for constructing a real-world 1 m-diameter icosahedral dome frame with equipment mounting points at the vertices. Such frames, called Light Stage domes, are important tools for computer graphics and vision measurements and relighting applications. Typical domes have 2 m diameter and are constructed from bolted steel parts. The new half-size dome is inexpensive, ...

An Inexpensive Suture Practice Board

OBJECTIVE We provide a design for an effective suture practice board for surgical instruction that is both easily assembled and repaired. METHODS This model's design is achieved through inexpensive materials that do not compromise adequate simulation through repetitive use. We used a wooden board, synthetic microfiber cloth, and metal plates and screws to create the suture board. Two pieces o...