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CDMA mobile communication system has the advantages of strong anti-interference ability, good confidentiality and large capacity, and has received widespread attention. CDMA uses the orthogonality ...[Details]
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Key points: Some experience in reducing noise and electromagnetic interference . (1) Use low-speed chips instead of high-speed ones, and use high-speed chips in key places. (2) Use a resistor in seri...[Details]
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Many people cannot distinguish between LED, OLED and LED backlight. At present, many manufacturers have changed the concept when promoting their products. They call it LED backlight display for sho...[Details]
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Maxim's 71M6x01 (71M6541D/71M6541F/71M6541G/71M6542F/71M6542G) series is the fourth generation of single-phase electricity meter SoCs that integrate a 5MHz 8051-compatible MPU core, a low-power RTC wi...[Details]
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A hundred years ago, Wei Yuan proposed in his book "Hai Guo Tu Zhi" that "learn from the foreigners to develop skills to conquer the foreigners" and called for learning advanced Western technology to...[Details]
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IT – Category 5-7, 100Base-TX, 1000Base-T
Pure Network
IP-level QoS
Packet loss is ok
Power over Ethernet
redundancy
Electromagnetic compatibility?
.....[Details]
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This mini audio amplifier circuit is designed for use as a low power audio amplifier in small size for CD players, iPods, Walkmans, computers, etc. The circuit shown here is mono, if you want to bu...[Details]
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Recently, Meizu announced that it will hold a Flyme 9 launch conference on March 2 and a Meizu 18 series 5G dual flagship launch conference on March 3. In addition, Meizu 18 will be equipped wi...[Details]
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According to the latest report from foreign media, the entry-level version of the iPhone 12 is limited by cost requirements, and Apple has reduced its design to a certain extent. For example, th...[Details]
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Battery voltage
Monitoring circuit
The diagram is shown below, which can achieve uninterrupted power storage:
...[Details]
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In early 2002, I started to write a working program for an IC card prepaid electricity meter. The meter used Philips' 8-bit 51-expanded single-chip microcomputer
87LPC764
, and wa...[Details]
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Volvo has developed a pedestrian detection system that responds when a pedestrian suddenly appears in front of the car.
The system detects the movement of pedestrians
Road saf...[Details]
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Abstract: Enhanced direct memory access (EDMA) is an important technology for fast data exchange in digital signal processors (DSP). It has the capability of background batch data transmission indepen...[Details]
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Shift: shift a binary number one place to the left or right, such as 11111111 =1, after shifting right one place it becomes 01111111, and fill the empty space with 0, and the same applies to left ...[Details]
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The burning of fuses in high-voltage motor excitation cabinets is a relatively complex problem, involving many aspects such as the working principle of the motor, the design of the excitation syste...[Details]
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