The use of metal glazed thick film ensures excellent weather resistance and heat resistance. Ultra long warranty rigid-flex board. Flexible printed circuits are used for 5G ultra-high frequency band and PCB based circuit boards used in Taiwan. Metal circuit boards are used for flexible boards and ultra-thin thick film flexible circuit boards in the 5G ultra-high frequency range. Flexible boards can withstand ultra-high frequency voltage and high frequency current, and metal circuit boards are more suitable for making mechanical structural components, which can increase the additional capacitance of the product under high frequency conditions. Thick film resistors have a high resistance temperature coefficient and can withstand higher currents and lower power. When it is necessary to bear large voltages or currents, they are easily affected by voltage or current. Usually, wire wound resistors with lower capacitance values combined with smaller resistors can achieve better high-frequency characteristics. However, as a passive power component, it is usually required that the capacitance value changes over a wide range, that is, both power and cost must be considered. The difference between high-power wire wound resistors and small resistors requires selecting appropriate resistance values based on specific requirements.
At present, people with contact frequencies above 100MHz have a general understanding of the application of switching power supplies and filter capacitors. However, for a design engineer, it is often difficult to consider parameter design if they want to design a simple power circuit.
For LED driver power supplies, the current flowing through the LED should not exceed the allowable value of the primary power supply, that is, the rated working current of the power supply device should not exceed the allowable value of the primary power supply. Due to the actual working current of the power supply, electrolytic capacitor and other components have been delisted, not because the working current of the power supply is small, but because the power supply current cannot be too large, certain protective measures should be taken at this time.

The challenge of using a constant current source circuit to design LED driver power supply: A power supply design based on a switching power supply requires reasonable adjustment of the working state of the switching power supply ECU to ensure power supply operation.
Wireless networks are commonly used in people's public places, and their applications can achieve various applications. Without increasing electromagnetic interference, they can also be applied in various public places. Currently, this has received widespread support, and with the development of information communication, its market demand has also emerged.
The working principle of liquid crystal displays is that the level is automatic, so people like the functions of liquid crystal display products, but the output functions of these products are also completely uncontrollable. Next, let's introduce some control functions of LCD displays.
● Display function: The power on array and power on (DCC) of the display screen indicate that the board is working properly. Indicates that the board is working properly. Next, let's introduce the testing on the board.
● Display function: can display backlight, LCD display screen is aging, LCD display performance deteriorates, and the display screen is not bright.
● Display function: When testing the screen, the display screen can only display "once at a time, only once at a time", and the display mode is to cycle continuously for 3 times and the third time.