As shown in the figure below, if there is no resistor R3, then when the voltage at point A (i.e. Vin) is greater than (VT1+Vbe), the PNP will be turned on. If resistor R3 is added now, the voltage on ...
I want to do some math questions for the postgraduate entrance examination. Which postgraduate entrance examination tutor can explain the real questions in a detailed and easy-to-understand way?...
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This afternoon 14:00-15:00Live AgendaApplication of wireless MCU products in the smart home industry- Introduction to TI's products in the field of wireless MCU- Introduction to su...
[color=#333333][font=Arial]The bottom row is connected to GND, and the others are connected to IO. When scanning the keys, set the first row to 0, scan the first column, set the second row to 0, scan ...
The Cortex-M3/M4/M7 core has a DWT unit (Data Watch and Trace Unit), which contains a clock cycle register with the same frequency as the CPU clock. IAR EWARM's C-SPY debugging system implements a 64-...
After receiving the X-NUCLEO-IKS01A3 kit, I have been searching and downloading materials, reading relevant manuals and analyzing codes. I used the STM32F401RE development board and tested it under th...
The near-infrared spectrum (1) refers to a section of the electromagnetic spectrum between the visible spectrum and the mid-infrared spectrum, that is, the light region between 780-2526nm. Near-i...[Details]
Thoughts on issues related to power development in the 14th Five-Year Plan
Yang Kun
(Secretary of the Party Committee and Executive Vice Chairman of China Electricity Council)
...[Details]
On September 10, the 2024 New Energy and Power Market Innovation and Development Conference and the 14th Global New Energy Enterprise Top 500 Forum jointly hosted by the Shanxi Provincial Energy Burea...[Details]
A practical guide for developers using NVIDIA® BlueField® series DPUs and the NVIDIA DOCA™ development environment On October 17, 2023, Beijing time, NVIDIA announced today that the book "Data Pr...[Details]
In embedded systems, the so-called memory interfaces include SDRAM interface, NORFLASH interface, DM9000 network card interface, etc. They all have one thing in common: they can directly connect to t...[Details]
Semiconductor lighting technology, whether it is upstream chips or downstream packaging phosphor technology, has most of the technology rights because the United States, Japan and other countries d...[Details]
LEDs face many challenges. For example, the forward voltage will change with changes in temperature and current, and the forward voltage of LEDs from different individuals, batches, and suppliers...[Details]
Section 001 Hardware Knowledge_UART Hardware Introduction 1. Hardware introduction of serial port The full name of UART is Universal Asynchronous Receiver and Transmitter, which means asynchronous...[Details]
The most commonly used signal testing instrument in laboratories and workshops is the electronic oscilloscope. Human thinking is sensitive to the concept of time, and is connected to time domain ...[Details]
Laser rangefinder is an optical instrument that measures the distance between a target and a laser. It has certain applications in many industries. When using a laser rangefinder, we need to understa...[Details]
1 Introduction
Introducing the power factor correction (PFC) technology in the switching power supply can, on the one hand, make the power input current and input voltage waveform in phase...[Details]
The HT47 series MCU is an 8-bit reduced instruction system (RISC) microcontroller launched by Holtek Semiconductor in recent years. In addition to the unique features of RISC microcontrollers, it h...[Details]
Operation Instructions Before testing, the instrument host and voltage collector shell should be reliably grounded, and correct wiring should be performed according to different test methods. For wi...[Details]
The sub-forum on new energy storage driving future energy transformation of the 7th Hongqiao International Economic Forum was held at the National Exhibition and Convention Center (Shanghai) on Novemb...[Details]
Analog electronics
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