Author Archives: Yoyokuo

Design of CAN network in automobile based on microcontroller MC9S12DP256 and MC33989 chip

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“With the increasing number of vehicle electrical equipment, from engine control to transmission system control, from driving, braking, steering system control to safety assurance system and instrument alarm system, from power management to various types of comfort improvement Efforts are made to make the vehicle electrical system form a complex… Continue reading →

Understand low-pass, high-pass, band-pass, band-stop, state-tunable filters at once!

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“The second-order voltage-controlled low-pass filter circuit is shown in the figure. Two first-order low-pass filters are formed by R1, C1, R2, and C2, respectively. However, C1 is connected to the output terminal, and positive voltage feedback is introduced to form a voltage-controlled filter. “ 1 Second-order voltage-controlled low-pass filter The… Continue reading →

7nm Ryzen 4-core CPU performance leads by 75%, motherboard manufacturers seize the straw

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In 2020, due to the impact of the epidemic, in addition to the recent surge in notebook computer sales, other PC markets have been impacted, and motherboard manufacturers are worried. However, AMD’s just-released 7nm Ryzen 3 series two quad-core CPUs and B550 chipset are expected to be life-saving straws. The… Continue reading →

How to choose the best discrete/digital sensor

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“Discrete or digital sensors are ubiquitous in automation systems. In the age of relay logic, even before the advent of programmable logic controllers (PLCs), digital sensors were used, and they still play a role in simplifying PLC logic. Discrete sensors send on/off (yes/no) signals, often allowing PLCs to ignore analog… Continue reading →

UK, US agencies accuse Russian military intelligence agency of ‘brute force’ cyber attack

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Several organizations have jointly issued a recommendation to improve security in the cyberspace. July 1, 2021 at 9:54 pm According to information released by the International Institute for Strategic Studies, U.S. authorities consider Russia’s General Staff (GRU) and certain subordinate units to be key players in offensive cyber and influence… Continue reading →

As automotive ADAS technology evolves to unmanned vehicle technology, more sensor technologies will be cited

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In 2019, as the automotive ADAS technology begins to evolve to unmanned vehicle technology, more sensor technologies will be cited. Technologies such as millimeter wave radar, laser radar (LiDAR) and inertial measurement components will be introduced to the test vehicle so that the vehicle can better obtain external information and… Continue reading →

Optical application micro-knowledge: related principles of laser processing technology

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Laser processing is a very important high-energy beam processing method, which has the characteristics of strong laser directionality, high brightness, good monochromaticity, and good coherence. The principle of laser processing technology is that the laser emitted by the laser generator is converted and focused by the lens to obtain a… Continue reading →