![]() This should be a themal pad, and should therefore be connected to a copper plane which has a low thermal resistance. round for +/- on polarized caps, or for anodes/cathodes on diodes I am inclined to prefer square pads for + terminals and anodes, because a square is more visually similar to a plus sign. Hi, I assume the pad you are reffering to is the middle one, between anode and cathode shown on page 10. Guidelines for diode polarity mark silk-screening the diode symbol, K for Cathode or A for Anode or. I gave up my fight to implement this in the official libs in the early days of KLC, so I just maintain my own libraries. 1 Greetings: Is there a standard on which pad to make square vs. ![]() I also have pin numbers turned on even for non-polarized components in my schematic symbols so I can positively identify the pins of all parts when troubleshooting. But, I find it easier for troubleshooting and documentation to simply be able to say “R2-1” (R2 pin 1) instead of “the end of R2 closest to U3” or some other feature otherwise unrelated to R2. I know it seems that it shouldn’t matter on non-polarized parts to know pin 1, and I agree with that for assembly. Regarding my own practices, when I said all I meant all including non-polarized parts. Examples, cathode or anode in the case of an LED, Pin 1 in an IC. For these (non polarized) footprints, all pad shapes should be consistent. With over 35 years experience in PCB assembly, Phil is one of the leading experts in. Non polarized parts (such as THT resistors) should not set the shape of Pin 1 to Rectangular. pins, and it has polarity name pin 1 CATHODE and pin 2 ANODE. The OUT1OUT4 PCB pads provide connec- tions for connecting each HB LED strings cathode to. Through hole components should set the shape of Pin 1 to Rectangular, and all other pads to either Circular or Oval. Concierge Parts Concierge, PCB layout (or any of our yet unreleased services) for the EE. each HB LED strings anode to the DC-DC preregulator output.
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