There are many engineers who are encountering problems. The crystal oscillator is on the circuit board, it will start to vibrate for a while, and it will not work for a while, or it can work normally with a hair dryer. At this time, we began to wonder if there is a problem with the crystal oscillator. In fact, we cannot conclude too early, we must grasp the core of the problem and make a correct judgment.
Materialist dialectics refers to a philosophical approach to the study of nature, society, history, and thinking. In fact, it is to tell us that in the event of encounters, we must divide it into two. For the crystal oscillator, it is no exception. The crystal oscillator should be analyzed from different angles. Below we analyze the crystal oscillation by internal and external factors:
1. Exclude the bad condition of external components, because the external parts are nothing but resistors and capacitors, which makes it easy for you to identify whether it is a defective product.
2. Exclude the possibility that the crystal oscillator is not a vibrating product. Here you will not stop testing if you only try 1~2 crystal oscillators.
3. Eliminate the possibility of line errors, so try to compare them with the recommended circuit of the corresponding model line.
4, you can change the capacitance of the two ends of the crystal, crystallize can work normally, please refer to the crystal oscillator's instructions for the size of the capacitor, matching capacitor is very important.
The crystal itself is caused by chip fragmentation, excessive impedance, poor frequency, and insufficient crystal traction to cause excessive parasitic reactions. Or on the circuit, the stray capacitance dispersion caused by the load capacitance or circuit design or processing is large, and the voltage at both ends of the crystal is insufficient, which will also cause the crystal oscillator to stop vibrating!
If you encounter such a problem, first check the frequency parameter of the crystal oscillator and the resistance of the crystal oscillator within the required range, if it is within the required range; secondly, check whether the soldering temperature of the crystal oscillator will be high, causing the crystal oscillator For secondary damage, the temperature of the soldering is generally required to be around 250 degrees or lower, and the maximum temperature is not more than 300 degrees. If these are within the requirements, then consider whether it is a problem with the entire microcontroller circuit.
Detecting the crystal parameters and adjusting the soldering temperature can be easily done. If the problem of the single-chip circuit can be solved by the solution provider, then the crystal oscillator will be leaked. The crystal oscillator will also have such a problem in wet weather conditions. It is recommended to replace a better quality crystal.
An electric slip ring is a rotary electrical connector. It allows uninterrupted power or signal transfer between two stationary points. It is also known as an electric Rotary Joint, power swivel, or electrical rotary joint. Electric slip rings are usually composed of a metal ring with several brush contacts on the inner circumference. And there are one or more pairs of contacts for power or signals on the outer circumference. The metal ring can be rigid or flexible, depending on the application.
An electric slip ring is an electromechanical device that allows the transmission of electrical power and signals from a stationary to a rotating structure. It consists of an electrically conductive rotating disc or ring, with a number of electrical contacts (or "slots") on its surface. The contacts are connected to external circuits, enabling the passage of power and/or data from the stationary to the rotating structure. Slip rings are also used in generators, where they allow the passage of current from the rotor to the stator.
A flat disc electrical slip ring is one kind of electric slip ring, it has many advantages: simple construction, small size, low cost, easy installation, and maintenance. It is widely used in various fields such as machine tools, textile machinery, printing machinery, packaging machinery, medical equipment, and aerospace equipment.
A 360-degree rotating Conductive Slip Ring is also called a hollow shaft slip ring or hollow conduct. It has an opening in the center that allows a shaft to pass through, making it ideal for rotating applications. Slip rings are often used in medical equipment, robotics, and manufacturing assemblies where rotation is required. This type of slip ring can handle large currents and voltages while providing a continuous electrical connection.
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