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  • 2017-12-25 11:32:46
  • 2016-11-30 15:14:12
    Holtek screen display driver IC HT16514Holtek Semiconductor's HT16514 is designed for applications such as POS machines and multimedia computers. Holtek HT16514 can be used for a wide range of logic operating voltage 2.7V ~ 5.5V, providing 60V high voltage output, and can be defined by the user D...
  • 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...
  • 2017-03-16 18:37:52
    Senior mechanics with professional skills and keen observation, which has a strong ability to solve the problem. The technology is based on the wisdom of senior technicians, experience and professional skills in the computer to generate practical computing procedures. The senior mechanic to solve the problem is the ...
  • 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...
  • 2016-11-30 15:16:38
    Holtek 8 - bit MicrocontrollersHoltek HT46CU25 micro controller HT46CU25 for home appliances and industrial control applications: such as: switching power supply, induction cooker, electronic pot, air conditioning equipment, temperature control fans, dishwasher, motor speed controller, washing machines. The...
  • 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 ...
  • 2016-11-28 19:59:29
    1.2.5 series and parallel capacitors 1. Series connection of capacitors The number of capacitor plates connected end to end, connected into a string, which is the capacitor in series. Figure 1.27 is a series circuit of three capacitors. Assuming that the total capacitance of the series capacitor is C, 1 / C =...
  • 2016-12-10 09:29:51
    Classification of resistorsThe resistor is a current-limiting element. Resistor is to provide a circuit to prevent the flow of current components, resistors through the consumption of electricity, the distribution of current in the circuit, so as to achieve a specific purpose.Resistors can be divided into three cat...
  • 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...
  • 2017-02-15 22:33:00
    Agilent Handheld Digital Multimeter U1253A FeaturesU1253A is an extension of the Agilent U1250 Series Handheld Digital Multimeter. Instrumentation and simultaneous measurements, as well as the flexibility required to provide quick verification tests, tolerance tests, and tolerance checks.Handheld 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...
  • 2016-08-27 21:52:39
    Electronic components has a different package types, different types of element shape, but the internal structure and purpose is not the same as in the, such as to220 package components may triode, controllable silicon, field effect transistor, or double diode.TO-3 package components have a transistor, integrated ci...
  • 2017-02-15 22:38:43
    1, the output voltage adjustment: the manufacture of switching power supply, the first test step is to adjust the output voltage to the specification range. After this step is completed, ensure that subsequent specifications are met.2, power regulation: power regulation rate is defined as the power supply in the input...
  • 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...
  • 2016-12-13 09:39:24
    NFC mobile phones have built-in NFC chips that form part of an RFID module that can be used as RFID passive tags - to pay for fees, or as RFID readers - for data exchange and acquisition.NFC technology supports a variety of applications, including mobile payment and transactions, peer-to-peer commu...
  • 2016-11-30 15:15:45
    Holtek 8 - bit ControllerHoltek's 8-bit controller, the HT45RM03, is Holtek's new product for the three-phase brushless DC motor control field. HT45RM03 has 4K OTP program memory (ROM) and 192 Byte general data memory (RAM), operating voltage 2.2V ~ 5.5V, the maximum system frequency ...
  • 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...
  • 2017-03-16 18:41:28
    When the PN junction plus the forward voltage, that is, the positive pole of the power supply P area, the negative then connected to the N zone, the applied electric field and the PN junction in the opposite direction of the electric field. Under this applied electric field, the equilibrium state of the PN ju...
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