After initialization, the timekeeping can be done normally, but why do the year, month, day and other registers return to zero even after power is turned off and reset? This is useless....
I have a question: How to pass variables down to 3 levels when nested make calls? There are 3 levels of directories, each level has its own makefile, and nested make calls are used. However, using exp...
Should the filter capacitor and bleeder resistor in the circuit be placed before or after the anti-reverse polarity diode?
What will happen if a capacitor of several μF is placed before the reverse-co...
Since the concept of "intelligence" swept the world, the construction and development of various regions of the motherland have been very good and hot, and even smart homes have become a highlight of ...
I would like to ask a question: In the maximum working mode of 8086, a bus arbiter 8289 is sometimes added. There is a resident bus mode in the working mode of 8289. What is the resident bus?...
Sailing is gaining more and more attention. How to use modern technology to assist training and improve competition results is particularly important. Considering the real-time data collection in t...[Details]
Introduction
Power subsystems are becoming more and more integrated into the overall system. Power systems have moved from being separate "essential dangerous devices" to being monitorable...[Details]
1. Disadvantages of choosing too high a voltage level
Choosing too high a voltage level will result in too high an investment and a long payback period. As the voltage level increases, the...[Details]
0 Introduction
High-precision current source can provide high-precision current supply for precision instruments, and is suitable for automatic measurement tasks of various resistors in semico...[Details]
Direct digital frequency synthesis (DDS) has fast frequency switching and modulation capabilities and is widely used. However, when low power consumption and low cost are the main considerations, D...[Details]
Features
POE technology can ensure the safety of existing structured cabling while ensuring the normal operation of the existing network and minimizing costs. The IEEE 802.3af standard is ...[Details]
introduction
Sudan's Muglad Oilfield is a large oilfield jointly invested, developed and constructed by a four-party consortium of China, Malaysia, Canada and Sudan. It consists of 8 satellite...[Details]
The rotor of the brushless DC motor used in electric bicycles is composed of 30 to 40 pieces of NdFeB magnets. Since the surface magnetic field strength of NdFeB magnets exceeds 500mT, the position se...[Details]
This paper first proposed an elevator controller algorithm based on a finite state machine, and then designed a three-story elevator controller based on the algorithm. The correctness of the elevat...[Details]
Conventional crystalline silicon solar cells are made on high-quality silicon wafers with a thickness of 350-450μm, which are sawn from pulled or cast silicon ingots. Therefore, more silicon materi...[Details]
When you are sitting in the subway train, feeling the convenience and comfort brought by the underground rail train, at this time, in the control center, the "brain" of the subway, a group of people a...[Details]
1 Introduction
At present, with the growing calls for environmental protection and energy conservation, new types of transportation that are pollution-free and have diversified energy configur...[Details]
One of the most common requirements of the automotive industry for automotive electronic systems is to achieve the best detection results in the smallest space. This is exactly the advantage of shunt ...[Details]
Two typical electric vehicle flasher circuits are given, and the parameters and specific instructions in the circuit are given. I hope it will be helpful to you!
1. This circuit consists of an...[Details]
“Productivity determines production relations, and the development of productivity determines the change of production relations”, yes, society is always full of changes, and advanced science and t...[Details]