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JLCPCB: There may be some components that generate high heat, such as the regulator, on the PCB. In order to prevent these components from being damaged, I am explaining PCB cooling techniques for you via EasyEDA of
 JLCPCB. Especially if your circuit has to be fed with 12V and you are doing things that will draw a little more current with a 5V regulator, you will notice that your regulator gets very hot. You want to prefer an SMD regulator in your circuit. No problem. If you are not going to draw more than 400mA current, I am sharing a few circuit tricks for you. In this article, I will not go into technical calculations for the sake of appealing to everyone. I will just tell you the methods. If you really want an article that includes technical calculations, you can let the
 JLCPCB team know. I will also prepare that article for you.
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JLCPCB: This time, as I announced at the end of the second article, I will summarize the details of the case production by
JLCPCB metal 3D printing.
 We also changed the shape of the PCB, so we will also touch on the points to note when ordering.
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JLCPCB: Filter circuits are used in many designs. Especially in circuits where the signal lines are carried by a long cable, fluctuations caused by the magnetic field outside should be filtered. These fluctuations can cause false signal detection and even break the processor with very high fluctuations. Generally, filters containing capacitors are used to prevent such situations. Because capacitors can absorb sudden surges on themselves. Capacitors used in filter circuits are simply called filter capacitors. But there is also a type of capacitor called a decoupling capacitor. Here we will see with examples what this capacitor does and how to place it with
 EasyEDA,
 JLCPCB's PCB design tool.
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