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  • 2016-08-30 00:15:59
    JT3 series DC electromagnetic relayJT3 DC electromagnetic relay common models are: 48V JT3-11/1 220V JT3-11 JT3-11/1 220V JT3-11 110V JT3-11/1 24V JT3-11/3 24V JT3-11 110V JT3-11/3 48V JT3-11 440V110V JT3-11/5 JT3-11/5 220V JT3-11/3 110V JT3-11/3 220V JT3-20 220V JT3-...
  • 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...
  • 2016-08-19 00:49:00
    The standard method of color ring inductance and the same color ring resistance. The size of the volume can be resolved through the size of the current. Because the use of the environment is different, it is impossible to calculate all the inductance requirements in a way, the specific environment of the design. Sm...
  • 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...
  • 2016-08-30 00:27:47
    Automotive relay is a kind of automatic control device when the input quantity (electric, magnetic, acoustic, optical, thermal) reaches a certain value. The automobile relay is a relay which is used in the automobile, the switching load power is big, the impulse and the vibration resistance are high.Auto relay has t...
  • 2016-08-15 12:00:04
    Automotive relay is a kind of automatic control device when the input quantity (electric, magnetic, acoustic, optical, thermal) reaches a certain value. The automobile relay is a relay which is used in the automobile, the switching load power is big, the impulse and the vibration resistance are high.Auto relay has ...
  • 2017-01-13 21:27:17
    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...
  • 2016-11-27 20:27:57
    1.8.3 Digital integrated circuits There are many types of digital integrated circuit products. They constitute a variety of logic circuits, such as gate circuits, flip-flops, counters, registers, encoders, decoders and so on. In our computer, there are a large number of various functions of the digital integrated ...
  • 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...
  • 2016-12-10 09:28:15
    Rules for the Implementation of Safety Inspection of ResistorsIn order to achieve the safe use of resistors, we must know the details of the implementation of the resistor safety inspection.First, informationProduct specifications, safety key components or raw materials list (material name, model specifications...
  • 2016-12-03 11:20:12
    Electromagnetic relay working principleElectromagnetic relay generally by the electromagnet, armature, spring, contacts and other components, and its working circuit from the low-voltage control circuit and high-voltage circuit composed of two parts. As long as both ends of the coil with a certain voltage, the coil ...
  • 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 =...
  • 2016-12-13 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...
  • 2016-12-03 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 ...
  • 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...
  • 2016-11-29 13:39:48
    Holtek vacuum fluorescent display tube HT49RVx full rangeHoltek's 8-bit vacuum fluorescent display HT49RVx is a full range of 16K, 8K, 4K, 2K OTP ROM program memory for customers with 768byte, 384byte, 192byte and 96byte Data RAM, depending on their needs.The HT49RVx family includes two...
  • 2016-11-26 19:26:38
    1. Over-Voltage Protection (OVP) Test: When the output voltage of the power supply exceeds its maximum limit voltage, the power supply will shut down its output (SHUTDOWN), called over-voltage protection. Over-voltage protection test to verify the power supply in the above-mentioned abnormal circumstan...
  • 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...
  • 2017-01-13 21:28:55
    Analog Device Testing: Test with an op amp. From the "A" point "virtual ground" concept: ∵ Ix = Iref, ∴ Rx = Vs / V0 * Rref, Vs, Rref excitation source respectively, the instrument calculates the resistance. Measured V0, then Rx can be obtained. If the measured Rx is capacitance, inductance, then V...
  • 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...
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