[size=4] Magnetic beads have high resistivity and permeability. They are equivalent to resistors and inductors in series, but both resistance and inductance vary with frequency. They have better high-...
The third generation of anti-noise products in China currently use dynamic noise reduction ( DNR ) technology. DNR technology dynamically adjusts the output voice switch through the changing voice pea...
Many people have done Bluetooth development, and many people can also add an attribute service by imitating the GATT routine, but many people may not be able to clearly understand the BLE attribute pr...
I bought a new multimeter last week. Actually, there is no shortage of multimeters now, but the Fluke multimeter I have been using is good in every way, except that every time it automatically shuts d...
Wide-area wireless network operators are increasingly involved in mobile broadband access and rich multimedia services. These services pose great challenges to wireless networks. Operators need t...[Details]
1. What is a task? When we design complex and large programs, we divide these complex programs into many simple small programs. These small programs are individual tasks. All small tasks work harmo...[Details]
1. Registering soft interrupt is of course through open_softirq Here are some examples: void __init init_timers(void) { int err = timer_cpu_notify(&timers_nb, (unsigned long)CPU_UP_PREPAR...[Details]
Liangzuan continues to update mainstream solutions and provide different configurations according to customer needs. Recently, it launched the first
motherboard based on the Amlogic T972 platfo...[Details]
The issues of safety and battery life are like the eternal dilemma of fish and bear's paw. They always seem to be on opposite sides and cannot be achieved at the same time. Companies always have t...[Details]
We have learned the function of table lookup before. We can use the table lookup function to implement many powerful functions, such as looking up cube tables, square tables, function tables, segment...[Details]
The regulated power supply introduced in this article is controlled by AT89S51 microcontroller. Use the potentiometer as the memory component, the 555 circuit as the A/D conversion, and the discrete ...[Details]
Here is a time concept, let's first understand it: the time to erase a single Flash sector or the entire chip of LPC2378 is 400ms, and the time to program 256 bytes is 1ms, so that you have a gen...[Details]
The 4th Focuslight Laser Application Industry Forum was successfully held in the Xi'an Focuslight Technology Co., Ltd. The forum was born in 2015. After four sessions of careful construction, it has ...[Details]
At present, solid-state lithium batteries and hydrogen fuel cells have become important technical routes for the development of the new energy vehicle industry. The two technologies compete with each...[Details]
The medical call system is a calling tool for patients to make requests when they need care or diagnosis. It can quickly convey the patient's request to the doctor or nurse on duty. It is one of th...[Details]
The latest data from the Ministry of Industry and Information Technology shows that Honor will launch a new smartphone. The model number of the device is HJC-AN00, and it shows a 6.53-inch screen siz...[Details]
1. Introduction
Fiber laser refers to a laser that uses rare earth-doped glass fiber as a gain medium. Fiber laser can be developed based on fiber amplifiers: under the action of pump light, h...[Details]
Apple has internally discussed the idea of launching some iPhone models without SIM card slots by next year, according to Bloomberg reporter Mark Gurman. In his latest Power On newsletter, Gurman s...[Details]
Auto-coupling step-down starting and star-delta starting are two commonly used motor starting methods. They have different effects on the current and torque of the motor during the starting process...[Details]
Analogue and Mixed Signal
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