Can anyone write a 4x4 matrix keyboard that determines how many times a key is pressed by judging the key value, that is, a key has multiple key values. For example, if you press this key 1, it will o...
I have two questions about chargers: 1. I don't know why the charger I use always burns the resistor near the front stage of 220V; 2. I charge a lithium battery, 2 batteries are connected in series, 8...
The memory resources are limited and the file is too large. I want to do multiple hmac-sha1 operations in blocks and finally get a 20-byte digest. I wrote one myself, but I still think it would be bes...
1. The problem of metal density. I use the chartered process, and now I solve it by expanding the surrounding area. But I want to ask, if DUMMY metal is placed on the periphery of the PAD, will it aff...
A parallel inverter consists of two thyristors (T1 and T2), a capacitor, a center-tapped transformer, and an inductor. The thyristors provide a current path, while the inductor L maintains a consta...[Details]
In recent years, many people have switched to new energy vehicles, and this type of vehicle has indeed been highly sought after and is considered the future direction of automobile development, and...[Details]
On August 21st, Zhiyuan Robotics revealed at its first partner conference that it expects shipments to reach thousands of units this year and tens of thousands next year. The company hopes to reach...[Details]
1 Source of creativity
With the further development of electronic technology, electronic pets have gradually entered people's family life. At present, there are two main categories of relative...[Details]
With the development of science, the use of variable frequency technology is becoming more and more widespread, and it is used in both industrial equipment and household appliances. Inverter air co...[Details]
A human-machine interface (HMI) refers to the platform used by people to operate a PLC. This platform provides an interface between programs and humans, serving as a medium for information transmis...[Details]
On August 22, the Wall Street Journal reported on the 21st local time that the new US government does not plan to acquire equity in semiconductor wafer foundry giant TSMC and Micron, one of the thr...[Details]
The difference between a series inverter and a parallel inverter is that they use different oscillation circuits. A series inverter connects L, R, and C in series, while a parallel inverter connect...[Details]
The composition of the water heater
The water heater itself is divided into the following parts:
1. Water tank.
This is where the water heater is filled with water and where the wate...[Details]
Pure electric vehicles have experienced rapid growth in recent years, and many consumers now consider them as a top choice when purchasing a car. But do you know how to choose a satisfactory and sa...[Details]
Today, the voltage of electronic products continues to rise to 400V, 600V and even 1000V, so there are few electronic load models that can handle such high voltages. Many people consider connecting...[Details]
With rapid economic development, the types of pollution sources are increasing, especially in chemical and industrial zones and their surroundings. The patterns of pollution and the types of ecolog...[Details]
ESD protection diodes are specialized for small-signal ESD protection or surge protection TVS arrays, often used for multi-circuit protection. Their small package size, low on-state voltage, high i...[Details]
Recently, UBTECH announced its patent for "robot self-battery replacement structure, device and method".
The Qichacha patent abstract shows that the robot's self-battery replacement stru...[Details]
Deep in the laboratory, a seemingly ordinary piece
of
battery
material
was fed into the China Advanced Research Reactor (CARR). Scientists activated the neutron depth profiling device,...[Details]
Mobile and portable
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