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The MAX485 IC has a notch or a round mark on one side. Pins are numbered counter-clockwise (looking from the components side), starting from that notch. |
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The IC socket has no mandatory orientation, but, if it has notch, it is a good practice to align it with the notch or mark of the IC, in order to reduce assembling mistakes. |
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The diode has a silver or color band identifying the cathode lead. |
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The resistor has no specific orientation. The two leads are interchangeable. |
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The RJ-12 jack has 6 pins. On the RJ-14 jack, pins 1 and 6 are missing. |