capacitance sensing
41Microwave power meter — A microwave power meter is an instrument which measures the electrical power at microwave frequencies. Usually a microwave power meter will consist of a measuring head which contains the actual power sensing element, connected via a cable to the… …
42Semiconductor curve tracer — The Type 575 Transistor Curve Tracer displays the dynamic characteristic curves of both NPN and PNP transistors on the screen of a 5 inch cathode ray tube. Several different transistor characteristic curves may be displayed, including the… …
43Diode — Figure 1: Closeup of a diode, showing the square shaped semiconductor crystal (black object on left) …
44Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
45Voltage regulator — A popular three pin 12 V DC voltage regulator IC. A voltage regulator is an electrical regulator designed to automatically maintain a constant voltage level. A voltage regulator may be a simple feed forward design or may include negative feedback …
46Metamaterial — Negative index metamaterial array configuration, which was constructed of copper split ring resonators and wires mounted on interlocking sheets of fiberglass circuit board. The total array consists of 3 by 20×20 unit cells with overall dimensions …
47Operational amplifier applications — This article illustrates some typical applications of operational amplifiers. A simplified schematic notation is used, and the reader is reminded that many details such as device selection and power supply connections are not shown. Contents 1… …
48Active pixel sensor — An active pixel sensor (APS) is an image sensor consisting of an integrated circuit containing an array of pixel sensors, each pixel containing a photodetector and an active amplifier. There are many types of active pixel sensors including the… …
49Liquid capacitive inclinometers — are Inclinometers (or Clinometers)whose sensing elements are made with liquid capacitive technology; they are considered gravity based. The best way to understand how they work is to think of a disc like cavity that is half filled with a… …
50Ohmmeter — An ohmmeter An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current. Micro ohmmeters (microhmmeter or microohmmeter) make low resistance measurements. Megohmmeters (aka megaohmmeter or in …
