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Because yuan parts of an apparatus is have way (besides individual except of yuan of parts of an apparatus, be like resistor, the) such as ceramics capacitance. How should be the direction of that yuan of parts of an apparatus judged? The introduction selects a dried food below. Note: As a result of the electron yuan sort of parts of an apparatus is more, the article is to collect merely took a few kinds commonly used and yuan of typical parts of an apparatus will introduce, from most fundamental beginning is shared, the hope rises to draw lessons from action certainly to abecedarian, if be great mind,still ask make corrections.
1.IC chip kind
What is IC chip kind? For instance odd a machine, 74LS138, 74HC595. This kind of chip has a characteristic, it is pin numerous, much show symmetrical type to distributing. See a few case.
The chip that SO-16 encloses, following plan institute show:
This kind of chip can have a dot, if red circle place is shown in the graph, the place that dot is in is the 1st foot of chip, such permutation its pin distributings, following plan institute show:
on PCB board enclose, general metropolis is in directional place leaves a gap, following plan institute show:
Soldering this kind yuan of parts of an apparatus when attention this at 2 o’clock:
Know the dot place that permits yuan of parts of an apparatus;
Know the breach place that encloses definitely;
Make clear Hunan this at 2 o’clock, this kind of enclosed cell won’t solder is wrong.
2. polarity inserts capacitance continuously kind
Polarity electric capacity has way, although want two to cite a base only but ten million cannot solder is wrong, otherwise capacitance can explode. The region that there can be a paragraph of gray on the housing that inserts polarity capacitance continuously and contain ” – ” date, following plan institute are shown.
This gray is in citing a base is negative pole, still have a method actually, those who bring length of foot for, short to lose.
Remember at 2 o’clock:
Gray is on housing, mark has ” – ” of date for negative pole, another side is positive electrode;
Those who bring crural weak point is negative pole, those who bring length of foot is positive electrode, this regulation also is applied to insert glow diode continuously;
3. polarity sticks a capacitance kind
Polarity sticks a capacitance to be maize housing commonly, housing one aspect of the matter has horizontal thick line, another end does not have horizontal bar, of bar having a horizontal stroke for positive electrode, another end is negative pole. Following plan institute are shown.
Remember a bit: Polarity sticks a capacitance, of bar having a horizontal stroke for positive electrode, another end is negative pole.
4. inserts diode continuously kind parts of an apparatus
Everybody knows, diode has a such characteristics: to resistor very small, incline to at 0; Retrorse resistance is very great. So diode if solder was turned over, on that circuit walk along a line to be equivalent to broken.
What differ with capacitance is, the one aspect of the matter that diode has horizontal line is negative pole, another end is positive electrode.
5. sticks a diode kind
Stick a diode to differentiate with what insert diode continuously the method is same, the one aspect of the matter of bar having a horizontal stroke is negative, another end is, following plan institute are shown.
After be being read, be opposite of yuan of parts of an apparatus losing differentiate does the method understand somewhat?