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New research from security firm Trend Micro shows that some devices found in the average home are more vulnerable to cyberattacks than others, and there are many ways for attackers to create chaos. ...[Details]

For a tube amplifier, if only the last power tube is connected, the AC noise will be very loud. How can I solve this problem? Strictly speaking, any audio amplifier is an energy converter, s...[Details]

When the ripple of the 5V signal output by the switching power supply was tested with an oscilloscope with a bandwidth of 500MHz, it was found that the peak-to-peak value of the ripple and noise reac...[Details]

The device characteristics and indicators of the permanent magnet motor system vary greatly under high and low temperature environments, the motor model and parameters are complex, the nonlinearity...[Details]

The spectrum analyzer, also known as the "RF multimeter", is a widely used basic RF and microwave measuring instrument. It is often used to measure harmonics and spurious measurements of amplifiers/t...[Details]

1 Introduction LED has been widely used in lighting, backlight and other fields due to its advantages of low power consumption, high luminous efficiency and long service life. The brightness o...[Details]

Apple plans to release an iPad Pro with a 3D-sensing rear camera in March 2020, according to a report from a South Korean website. 　　 Citing unnamed industry insiders, the report said South Korean co...[Details]

In the hot summer, the proportion of solar power generation in the energy mix has reached a new high. But what should we do when there is no sun on rainy days? The solution is to use bidirectional c...[Details]

Pin Name Pin Function Description VCC Power positive GND Power Ground Port B (PB7..PB0) Port B is an 8-bit bidirectional I/O port with programmable internal pull-up resistors. Its output buf...[Details]

1. Errors caused by non-axisymmetric flow When the velocity of the fluid in the pipe is axisymmetrically distributed and in a uniform magnetic field, the magnitude of the electromotive force g...[Details]

According to PCWorld, a Microsoft spokesperson said in a statement that it will continue to provide Microsoft software updates to customers of Huawei devices.   With the US government imposing a ban ...[Details]

Key interruption experiment, experiment 2 is key query 1. Experimental Principle 1. Use the buttons in query and interrupt mode  For buttons, use query and interrupt modes. Query mode is to put...[Details]

1. All-vanadium liquid flow battery: cost reduction is the primary task of the current industry development At present, 43% of the cost of all-vanadium liquid flow batteries is electrolyte...[Details]

1. Measuring range: 1～1999μΩ 2. Resolution: 1μΩ 3. Test current: DC 100A 4. Measurement accuracy: 0.5%±1d 5. Display mode: Current: three and a half digits LCD Resistor: Three and a half LCD 6. Worki...[Details]

Electric tricycles, also known as electric tricycles, are an environmentally friendly and energy-saving means of transportation that have been widely used in logistics, express delivery, sanitation...[Details]