Why does the PCB board have to be impedance?
Impedance is usually denoted by z, z is a complex number, the real part is called resistance, the imaginary part is called reactance, and the unit of impedance is ohm.
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New design PCB board find fault method to share
New design PCB board to find the fault method: 1. Voltage measurement method, 2. Signal injection method, 3. See, hear, smell, touch
How to check whether the circuit board is good or bad
Because the printed circuit board has high reliability, high density, strong design, strong production and other unique advantages, a good quality electronic equipment, largely depends on its PCB quality.
The harm of waste circuit board and how to recycle circuit board
Every smart appliance or non-smart appliance is controlled by a circuit board, and each circuit board will have its own life, that is, the expiration date.
What is electric gold plating, hard gold, soft gold, gold, flash gold in the circuit board
At present, many circuit board surface treatment methods, the cost of electroplating nickel gold is relatively high compared with other surface treatment methods, in the case of gold prices are so high, has been less used, unless there are special uses.
The cause of PCB board burst and its solution
Board explosion caused by water absorption accounted for 70% of the defects, other reasons such as PCB structure uneven growth and contraction, cold and heat imbalance, process injury and bad blackening.
Shenzhen circuit board assembly processing manufacturers
Some common reasons for using reinforcement in PCBA processing are: 1. Board support area with SMT or patch component PTH components. 2. Maintain reasonable thickness of flexible circuit. 3. PCB connectors are supported. 4. Make sure the board is treated
How to improve EMI of circuit board through component placement?
The EMI control of the printed circuit board becomes extremely important for the overall design. How to avoid PCB electromagnetic interference in switching power supply has become a topic that developers are very concerned about.
How to make a circuit board fast
PCB manufacturers have increasingly high quality requirements for PCB, want to really quickly produce high-precision, good performance, and can save the cost of PCB circuit board, which is undoubtedly the biggest challenge for circuit design engineers.
The basic principles and requirements of PCB board drawing design
As an electronic engineer design circuit is a necessary hard work, if the PCB design is not reasonable performance will be greatly compromised.
Does pad size affect circuit board welding?
The circuit board software designed by many circuit board designers is designed according to the components of the circuit board software itself.
Why is it necessary to clean the circuit board after soldering?
The calibration shall be carried out by an approved standard measuring institution. The quality assurance department shall register the calibrated equipment, instruments and tools and keep a calibration record book.
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