問題

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  AD8021 is used to amplify weak signals. Why can it be amplified normally? AD8021

  October 22, 2020 by Adrian 1
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  After the development board USB is connected to the computer, do not press the power button, the motor is also rotating. USB

  October 22, 2020 by Owen 1
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  Does the PCB layout affect the current consumption? PCB

  October 22, 2020 by Lily 1
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  Is there room for improvement in Flash programming speed? IAP

  October 22, 2020 by Mia 1
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  Please help to take a look at what are the shortcomings of this PCB? PCB

  October 22, 2020 by Emily 1
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  Why is the on-load voltage higher than the no-load voltage when the primary side feedback IC is used as a small power supply? power supply

  October 21, 2020 by Erwin 3
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  What is the function of this resistor in the switching power supply circuit? Switching power supply

  October 21, 2020 by Eman 2
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  A problem with the PFC circuit. PFC

  October 21, 2020 by Shelly 2
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  What is the function of C23 and R31 in the complementary output circuit in the figure? Complementary output

  October 21, 2020 by Johnson 1
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  The triode controls the solenoid valve circuit and the board is hot. How to solve it? Triode

  October 21, 2020 by Marguerite 1
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  Voltage problem of open circuit. Open circuit

  October 20, 2020 by Elliott 6
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  How does this series circuit realize the function similar to the voltage regulator tube? Zener tube

  October 20, 2020 by Mila 6
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  24V relay transistor drive problem. Triode

  October 20, 2020 by Hector 6
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  Design a thermometer with a thermistor temperature measurement bridge amplifier and use voltage to express temperature. Why is the simulation wrong? thermometer

  October 20, 2020 by Drew 6
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  5V power supply to charge the rechargeable battery, is this circuit possible? Indicator light

  October 20, 2020 by Cassidy 6
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  The op amp circuit is oscillating, please help from experts. oscillation

  October 19, 2020 by Pamela 8
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  How to determine the input current of the voltage regulator chip? Power Supply

  October 19, 2020 by Nikita 6
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  Constant current source controls the on-off problem of analog switches. A constant current source

  October 19, 2020 by Thalia 6
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  Is there a super capacitor voltage equalization circuit? Please help analyze the working principle of this circuit? TL431

  October 19, 2020 by Rihanna 6
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  Please help me see the function of the op amp in the figure below, the op amp with the red arrow, thank you. Op amp

  October 19, 2020 by Steve 6