Inductance Resistance
Inductance Resistance
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Inductance $128 The only resource devoted Solely to Inductance Inductance is an unprecedented text, thoroughly discussing “loop” inductance as well as the increasingly important “partial” inductance. These concepts and their proper calculation are crucial in designing modern high-speed digital systems. World-renowned leader in electromagnetics Clayton Paul provides the knowledge and tools necessary to understand and calculate inductance. Unlike other texts, Inductance provides all the details about the derivations of the inductances of various inductors, as well as: Fills the need for practical knowledge of partial inductance, which is essential to the prediction of power rail collapse and ground bounce problems in high-speed digital systems Provides a needed refresher on the topics of magnetic fields Addresses a missing link: the calculation of the values of the various physical constructions of inductors—both intentional inductors and unintentional inductors—from basic electromagnetic principles and laws Features the detailed derivation of the loop and partial inductances of numerous configurations of current-carrying conductors With the present and increasing emphasis on high-speed digital systems and high-frequency analog systems, it is imperative that system designers develop an intimate understanding of the concepts and methods in this book. Inductance is a much-needed textbook designed for senior and graduate-level engineering students, as well as a hands-on guide for working engineers and professionals engaged in the design of high-speed digital and high-frequency analog systems. |
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Inductance Calculations $15.23 No Synopsis Available |
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Infrared Thermometer Uni-Trend UT305B $239.00 This infrared pyrometer measures temperature within the range from -50ºC to 1250ºC in ºC or ºF. UNI-T UT305B Infrared Thermometer Features |
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Infrared Thermometer Uni-Trend UT305C $149.00 This infrared pyrometer measures temperature within the range from -50ºC to 1550ºC in ºC or ºF. UNI-T UT305C Infrared Thermometer Features |
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Infrared Thermometer UNI-Trend UT303C UNI-T UT303C infrared thermometer for non-contact temperature measurements is fast, efficient and easy to use when checking starters, fuses, enclosed relays, bearings, belts and sheaves. UNI-T UT303C Infrared Thermometer Features |
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Sinometer MS8222H Digital Multimeter & LCR Meter $35.83 The Sinometer MS8222H is a professional fully featured digital multimeter as well as a LCR meter, you can use it to measure AC/DC voltage and current, resistance, capacitance, inductance, frequency and temperature both in fahrenheit and celsius. This meter comes with all the accessories and 1 year manufacturer’s warranty. Specifications: *DCV:0-200mV-6V-60V-600V-1000V±0.5% *ACV:0-200mV-2V-20V-±0… |
How Do Metal Detectors Work?
In 1881, Alexander Graham Bell constructed one of the world's first metal detectors in an attempt to find an assassin's bullet in President James Garfield. Fischer patented a portable version in 1931. From treasure hunting to security screening, metal detectors are used in many a field.
Metal detectors are electronic devices that are used to find traces of metal usually from the ground, a person, or cargo. This metal could be anything from discarded pieces of aluminum to buried treasures. These devices can penetrate sand, soil, wood and other non-metallic substances.
A basic metal detector consists of an electronic box and a battery case on one end, with a handle for the operator's arm. There is a coil, which consists of an insulated wire around a telescoping shaft and into a round plastic disk. This disk comes off the shaft at an angle, which allows it to be held parallel to the ground. The operator grips the electronic box and turns on the power to slowly sweep the coil end over the ground until an electronic signal is heard. This indicates the presence of some metallic element buried beneath the area swept by the coil.
Metal detectors work on the principal of electromagnetism and their effects on conductive metals. The high-powered coil of metal, called the transmitter, uses the battery power to generate a penetrating magnetic field. As the electromagnetic field enters the ground, anything metallic will become charged with magnetism. When the receiver in the coil detects the electromagnetic signature, it sends a signal to the electronic box. A speaker amplifies this signal and the operator hears a beep. Microprocessors located in the electronic box can actually measure the time between the charging and the receiving (called a phase shift) and determine which metals may be present. This is how high-end metal detectors can be adjusted to only search for certain metals.
Metal detectors use one of three technologies:
A beat frequency oscillator detector uses a coil as an inductor in an oscillator. When its frequency changes, so does its inductance. Another oscillator produces a close frequency, and audible beats between them signal metal.
An induction balance detector uses two coils that overlap each other. A sine wave is transmitted with one coil and received with the other. The coils are adjusted so that there is no signal in the receiving coil when there is no metal nearby.
A pulse induction detector generates pulses by cutting off an indicator. This pulse is sent through a coil and the detector listens for echoes.Metal Detectors Infoprovides detailed information about walk-through, hand-held, and used metal detectors, as well as reviews of best metal detectors. Metal Detectors Info is the sister site ofSecurity Cameras Web.
Article Source: http://www.simplysearch4it.com/article/8619.html
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10 Inch Pro Mid Bass Speaker; 1000W Max; 8 Ohms - KAPPAPRO10A $129.99 Nominal Basket Diameter 10 254mm Nominal Impedance. 8 ohms Power Rating Watts 500W Music Program 1000W Resonance 46Hz Usable Frequency Range 102Hz-2kHz Sensitivity. 97 Magnet Weight 80 oz. Gap Height 0.375 9.53mm Voice Coil Diameter 3 76.2mm THIELE SMALL PARAMETERS Resonant Frequency (fs) 46Hz Download PDF Spec Sheet Download PDF Cabinet Design DC Resistance (Re) 6.50 Coil Inductance (Le) 1.15mH Mechanical Q (Qms) 10.10 Electromagnetic Q (Qes) 0.20 Total Q (Qts) 0.20 Compliance Equivalent Volume (Vas) 52.2 liters / 1.8 cu.ft. Peak Diaphragm Displacement Volume (Vd) 110cc Mechanical Compliance of Suspension (Cms) 0.31mm/N BL Product (BL) 18.8 T-M Diaphram Mass inc. Airload (Mms) 38 grams Efficiency Bandwidth Product (EBP) 230 Maximum Linear Excursion (Xmax) 3.2mm Surface Area of Cone (Sd) 344.9 cm2 Maximum Mechanical Limit (Xlim) 10.9mm MOUNTING INFORMATION Recommended Enclosure Sealed 7-9.9 liters/0.25-0.35 cu.ft. Vented 12-28 liters/0.43-1 cu.ft. Overall Diameter 10.25 260.4mm Baffle Hole Diameter 9.13 231.8mm Front Sealing Gasket fitted as standard Rear Sealing Gasket fitted as standard Mounting Holes Diameter 0.28 7.1mm Mounting Holes B.C. D. 9.63 244.5mm Depth 4.33 110mm Net Weight 15.3 lbs. 6.9 kg Shipping Weight 16.4 lbs. 7.4 kg MATERIALS OF CONSTRUCTION Coil Construction Copper voice coil Coil Former Polyimide former Magnet Composition Ferrite magnet Core Details Vented core Basket Materials Die-cast aluminum basket Cone Composition Paper Cone Cone Edge Composition Cloth cone edge Dustcap Composition Solid composition paper dust cap |
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3 3/4 Digit, Cap. / Ind. / Logic $88.95 In addition to functions found in regular DMMs, this meter can also measure inductance in 5 ranges (4mH,40mH,400mH,4H, 40H), capacitance in 5 ranges (4nF,40nF, 400nF, 4uF, 400uF), frequency in 4 ranges(4KHz, 40KHz, 400KHz, 4MHz), TTL logic test, diode test and transistor hFE test. 5 AC/DC ranges up to 1000V (AC750V), 3 AC/DC current ranges up to 20A and 7 resistance ranges up to 4000 M ohms. Includes test leads, battery, spare fuse, and manual. Net weight: 1lb. |