kk匡的日記&學習筆記

Resistor 電阻
capacitor 電容
Switch 開關
Inductor 電感元件
Diodes 二極管
Bipolar Junction Transistor, BJT三極管
Transistor 晶體管
N-channel mosfet 金屬氧化物半導體場效電晶體
Relay 繼電器

電阻：第一個是美國通用，第二個是國際通用。

第一個是可變電阻，第二個是電位器。

電容，電解電容

1. 基本電容符號，如陶瓷電容、電解電容。
2~5. 有極性電容，電解電容符號，彎片為負極，空心為正極
6. 可調電容符號
7. 微調電容符號

Switch
Single-pole/single-throw (SPST)

SPDT, SP3T

DPDT

DC Source, AC Source

一粒電芯，兩粒電芯（長線代表正極）

1500 mAh Alkaline Battery - AA, Lithium Ion Battery - 1Ah

Voltage Nodes

Diodes 二極管

Light-emitting diodes (LEDs) , Photodiodes 光電二極體

Schottky diode 蕭特基二極體, Zener diode 齊納二極體（穩壓管）

Transistors 電晶體
Bipolar Junction Transistors (BJTs) 三極管, MOSFETs 金屬氧化物半導體場效電晶體

Collector (C) and emitter (E) pins

Metal Oxide Field-Effect Transistors (MOSFETs) 電容金屬氧化物半導體場效電晶體
source (S), drain (D), and gate (G)

Digital Logic Gates

Integrated Circuits 集成電路

Unique ICs: Op Amps, Voltage Regulators 穩壓器
Amplifiers 放大器
A non-inverting input (+), inverting input (-), output, and two power inputs.

Voltage regulators are usually three-terminal components with input, output and ground (or adjust) pins.

Quartz crystal unit/Quartz crystal resonator 石英晶振諧振器

They help provide a clock signal.

Headers and Connectors
Whether it’s for providing power, or sending out information, connectors are a requirement on most circuits. These symbols vary depending on what the connector looks like, here's a sampling:

Transformer 變壓器
Transformers usually involve two coils, butted up against each other, with a couple lines separating them:

Relays 繼電器

Speakers 喇叭 and buzzers 蜂鳴器

Motors

Fuses保險絲 and PTCs熱敏電阻

The value tells us how many ohms歐姆, farads法拉, or henries亨利 they have.

Component names are usually a combination of one or two letters and a number. The letter part of the name identifies the type of component – R’s for resistors, C’s for capacitors, U’s for integrated circuits, etc. Each component name on a schematic should be unique; if you have multiple resistors in a circuit, for example, they should be named R1, R2, R3, etc. Component names help us reference specific points in schematics.

Junctions and Nodes 節點
Nodes give us a way to say that "wires crossing this junction are connected".

Net Names

Nets with the same name are assumed to be connected, even though there isn't a visible wire connecting them. Names can either be written directly on top of the net, or they can be "tags", hanging off the wire.