Avoid penalties for non-compliance–Designers need to follow regulations regarding electromagnetic compatibility (EMC) when designing PCBs because failing EMC testing could lead not only do fines but also to loss of customer trust which could cause irreparable damage even if those penalties eventually get waived.Today qihe smt pick and place machine sharing What circuit measures in PCB design can improve the electromagnetic compatibility performance of the product?
When we design electronic circuits, we pay more attention to the actual performance of the product, and do not consider too much the electromagnetic compatibility characteristics, electromagnetic disturbance suppression and electromagnetic anti-interference characteristics of the product. In order to achieve the purpose of electromagnetic compatibility when using such a circuit schematic diagram for PCB layout, necessary circuit measures must be taken, that is, to add necessary additional circuits on the basis of its circuit schematic diagram to improve the electromagnetic compatibility performance of its products.
The following circuit measures can be used in actual PCB design:
A resistor can be connected in series on the PCB trace to reduce the transition rate of the upper and lower edges of the control signal line.
Try to provide some form of damping (high-frequency capacitors, reverse diodes, etc.) for relays, etc.
The signal entering the printed board should be filtered, and the signal from the high-noise area to the low-noise area should also be filtered. At the same time, the method of connecting terminal resistors is used to reduce signal reflection.
The useless end of the MCU should be connected to the power supply or ground through the corresponding matching resistor. Or defined as an output terminal, the terminals on the integrated circuit that should be connected to the power supply and ground must be connected, and should not be suspended.
Do not leave the unused gate circuit input in the air, but connect it to the power supply or ground through the corresponding matching resistor. The positive input terminal of the unused op amp is connected to ground, and the negative input terminal is connected to the output terminal.
Provide a high-frequency decoupling capacitor for each integrated circuit. A small high-frequency bypass capacitor must be added next to each electrolytic capacitor.
Use large-capacity tantalum capacitors or polyester capacitors instead of electrolytic capacitors as charge and discharge energy storage capacitors on the circuit board. When using tubular capacitors, the case should be grounded.
Read more: How to Optimize PCB Design for EMC Compliance?Best seller SMT Machine ：Qihe smt line products
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What is SMT in engineering?
Surface mount technology is a part of the electronic assembly that deals with the mounting of electronic components to the surface of a PCB. Electronic components mounted this way are called surface-mounted devices (SMD). SMT was developed to minimize manufacturing costs while making efficient use of board space.Qihe SMT company develops and produces all kinds of SMT equipment suitable for world wide market, including pnp machine,reflow oven,stencil printer,pcb handling machines,and other products.
Small desktop pick and place machine TVM802A,TVM802B,TVM802AX,TVM802BX series suitable for beginners, for hobbiest or low vol usag.
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What is SMT in programming?
Offline Automated Programming vs Inline SMT Programming
Qihe pick and place machine can be programmed directly on the SMT equipment .
Or Coordinates can also be imported csv file through programming software.
Currently supported software such as protel,DXP,Altium Designer,Pads,Candes,proteus,DXP.
Inline SMT programming is a solution to consider for narrow segments of device programming requiring short programming times, with medium to high volume, for just one device type.
WHAT IS SMT pick and place machine？
SMT (Surface Mounted Technology) is a comprehensive system engineering technology, which covers substrates, design, equipment, components, assembly processes, production accessories and management. When it comes to SMT pick and place machines, the automatic SMT production line requires automatic loading and unloading machine, automatic solder paste printing machine, placement machine, reflow soldering machine, AOI inspection equipment, conveyor,connecting table, etc. For these SMT assembly line equipment, Qihe SMT can offer you machines in prototype SMT line, small SMT production line, mass production SMT line at low SMT line cost. Contact us now if you are interested.
WHAT IS SMT ASSEMBLY LINE？
With the development of technology, future electronic products will be lighter, smaller and thinner. Traditional assembly technology can no longer meet the requirements of high-precision and high-density assembly. A new type of PCB assembly technology-SMT (Surface Mount Technology) has emerged. SMT Assembly is the use of automated machines to assemble electronic components on the surface of the circuit board. Its density, high speed, standardization and other characteristics occupies an absolute advantage in the field of circuit assembly technology. In addition, SMT assembly has a wide range of uses.
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