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  • 2016-08-15 12:08:45
    The role of the transformer gas relay isGas relay in oil filled transformer, used as the main protection of internal fault of transformer oil tank. Gas relay points to protect the severity, the so-called light gas protection is when the transformer leakage or other reasons caused by the oil level drops, a heavy gas ...
  • 2016-12-13 09:41:22
    Direct Attached Storage (DAS) is an abbreviation for Direct Attached Storage, which means that an external storage device is directly connected to a computer through a connecting cable. DAS this direct way to solve the single server storage space expansion, high-performance transmission needs, and a single ...
  • 2016-12-12 13:40:49
    Fixed resistance testing method(1) Rotate the multimeter's function selector switch to the resistance range and select the appropriate range according to the nominal value.(2) Analog multimeter first two short-circuit test pen, zero; digital multimeter will be two short-circuit test pen, read the original readin...
  • 2017-01-13 21:25:39
    1.2.3 The unit of capacitance The basic unit of capacitance is F (method [pull]). The actual capacitance of the device is usually very small, "F" this unit appears too large, so there are other units of capacitance, such as mF (microfarads), uF (microfar), nF (natto), pF ). The conversion relationship betwe...
  • 2016-12-03 11:27:17
    Resistance to damage characteristicsResistor is the largest number of electrical equipment in the electronic components, resistors are generally the following characteristics of the damage:Short circuit That is, the resistance is zero, directly connected.2. Open circuit. That is, infinite resistance, the circuit ...
  • 2017-02-21 15:14:25
    Omron high-performance printed circuit board appearance inspection device, to improve the quality of electronic equipment to contribute In the home appliances, mobile phones and other electronic equipment, there are many places will be used to weld electronic components and circuit wiring with the "printed circuit bo...
  • 2016-12-12 13:43:52
    Application Principle of VaristorVaristor is mainly based on zinc oxide as the main raw material, add a variety of small amounts of metal oxides, formed by sintering ceramic components. It is a transient voltage suppression function of the components can be used to replace the transient suppression diode, zener di...
  • 2016-11-26 19:18:32
    Agilent U1253A Handheld Digital Multimeter FeaturesThe U1253A is an extension of the Agilent U1250 Series handheld digital multimeter. Instrumentation can perform simultaneous measurements and provide the flexibility needed for fast verification tests, tolerance tests, and tolerance checks.Hand-held digi...
  • 2016-12-10 09:26:00
    VT66 / 66A triode type music integrated circuitVT66 / 66A typical application circuit as shown:VT66 / 66A package with TO92, its shape and plastic 9013-type transistor resembles, and its own with a metal heat sink, there are three leads to feet, and the general use of the same transistor as convenient, it is...
  • 2016-11-27 20:29:47
    2. Fixed resistor selectionThere are many types of fixed resistors, and the choice of which material and structure of the resistor, the circuit should be based on the specific requirements of the application. (1) Nominal values of the selected resistors should be close to those calculated in the circuit design. Gen...
  • 2017-01-13 21:28:16
    In the circuit diagram, a capacitor (fixed capacitor) is represented by the graphical symbol shown in Figure 1-26. The capacitor character is the letter "c". If there are multiple capacitors in the circuit diagram, use the letter "c" plus the number to be distinguished, for example: c1, c2, c3 ...... In the mor...
  • 2016-11-29 13:35:48
    Features of Toshiba Super Sensitive CMOS SensorToshiba's smallest ultra-sensitive CMOS sensor has a pixel pitch of only 1.12 microns. The sensor can be used in tablet PCs, smart phones and other fields, covering the commonly used 500-800 million pixel value.The CMOS sensor is the industry'...
  • 2016-08-26 23:05:57
    Design and implementation of automatic test system for frequency band of amplifierDevelopment of the integrated circuits are widely used and surface mount technology, traditional testing technology and increasingly stretched, in analog integrated circuit testing is particularly prominent. In order to improve the sim...
  • 2017-03-16 18:40:53
    When the PN junction plus reverse voltage, that is, the positive pole of the power supply connected to the N area, the negative then P area. The direction of the applied electric field is the same as the direction of the electric field in the PN junction, and the PN junction is in the reverse bias. Under the...
  • 2016-12-03 11:16:43
    Selection of braking resistor usageBraking Resistor A braking resistor is a carrier used to dissipate the regenerative energy of a motor in thermal energy. It is mainly used in inverter control motor fast stop mechanical system to help the motor because of its rapid parking generated by the regeneration of electri...
  • 2016-11-29 13:38:54
    Analysis of the Anti - high - frequency Interference Circuit of Safety CapacitorSafety capacitor is divided into X capacitor and Y capacitor, they are used for EMI / RFI suppression. EMI (Electro Magnetic Interference) for electromagnetic interference, RFI (Radio Frequency Interference) means...
  • 2016-12-10 09:27:36
    Hi-Fi audio in the electronic components - metal film resistorsIn order to better achieve the perfect sound quality, Hi-Fi audio circuit commonly used in low thermal noise, good stability of the resistance, in all kinds of resistors, the metal film resistor performance is particularly good.Metal film resistance i...
  • 2016-12-19 09:50:06
    HSDPA mobility: In HSDPA, the introduction of the HS-DSCH channel, the design mechanism is not soft-switching, that is, in the high-speed data transmission, while only one Serving Cell service. In the R5, the change of the HS-DSCH Serving Cell can only be realized by the physical channel re...
  • 2016-12-19 09:51:51
    According to the technical distinction: from its working principle and the core components to distinguish between black and white power is also possible, black power is more through the electronic components, circuit boards, and white is more electrical energy through the motor will be converted to heat, Kinetic ener...
  • 2016-08-19 00:51:51
    The magnet can be induction to the space of all magnetic signals around within a certain range, continuous in each frequency resonance is generated at the top of the coil and variable capacitance and resonant frequency of the corresponding foreign frequency will be selected and amplifier with sound, deviate from the b...
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