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This paper analyzes the working principle of the voltage protection circuit composed of a single junction transistor and a thyristor, and proposes a circuit that uses the LM339 voltage comparator t...[Details]
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1. Classification 2. Schematic diagram 2.1 Passive 10:1 probe 2.2 Passive low-resistance probe 2.3 Passive 1:1 probe The figure above is an incorrect schematic diagram, the figure belo...[Details]
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About a month ago, a tipster revealed that OnePlus is working with German camera giant Leica to develop the cameras for the OnePlus 9 series. Now, another tipster says that this information is not tr...[Details]
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The simplest "constant current" charger is shown in the figure. It uses capacitive reactance to reduce voltage and limit current, and the capacitive reactance Xc=1/2πfC. In the formula, π is 3.14, ...[Details]
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On July 20, the review meeting of the 6th "Shenzhen Industrial Award" was successfully held. After 5 days of publicity, the new list was officially announced. Kalku won the honor of the 6th "Shenzh...[Details]
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ECG signal is the differential voltage between specific points of the human body, with a signal amplitude between 0.5mV and 8mV, and a typical value of 1mV. ECG is subject to very strong power freq...[Details]
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It is reported that Apple recently obtained a new patent for automotive safety, including seat belts and roof airbags. Judging from the patent, Apple Car will change the design of the sunroof and d...[Details]
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In recent years, India's demand for energy has been increasing, and its energy consumption level is second only to China and Japan in Asia. As India's local energy resources storage and production ...[Details]
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Overall design
The CAN bus interface circuit mainly includes: single chip microcomputer, controller interface, bus transceiver and watchdog circuit, etc. The SJA1000 controller produced by Phil...[Details]
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1. Introduction to STM32 Timer There are 11 timers in STM32, including 2 advanced control timers, 4 normal timers, 2 basic timers, 2 watchdog timers and 1 system tick timer. The system tick timer is ...[Details]
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Because I need to generate random numbers in the range of when making something, I found a method online, which is to use the ADC floating pin to generate random numbers, so I tried it and shared the...[Details]
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In recent years, my country's new energy vehicle industry has developed rapidly. As the scale of the electric vehicle market continues to grow, my country's power batteries will usher in a "scrap w...[Details]
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Portable instrument is an important branch of single chip microcomputer research. This paper introduces a multi-parameter environmental monitoring instrument based on Sunplus single chip microcompu...[Details]
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1 Introduction At present, GaAs MESFET LNAs are widely used in the RF frequency range up to several GHz. Their advantage is that they can achieve a noise figure as low as about 1 dB while achieving...[Details]
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According to foreign media techpowerup, Samsung Electronics announced today that it will showcase 13 innovative technologies from its C-Lab project at CES 2022. This project consists of two part...[Details]
RF/Wirelessly
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