< Practical Electronics
Power Sources
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| Voltage Source |
Current Source |
Controlled Voltage Source |
Controlled Current Source |
Single cell |
Battery of cells |
Grounds
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| Signal Ground |
Chassis Ground |
Earth Ground |
Resistors
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| Resistor | Variable Resistor |
Potentiometer |
Capacitors
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| Capacitor |
Polarized Capacitor |
Variable Capacitor |
Transformers
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| Air-core Transformer |
Iron-core Transformer |
Center-tapped Transformer |
Autotransformer | Coil with tickler | Step up | Step down |
Diodes
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| Diode | Light-Emitting Diode |
Zener Diode |
Schottky Diode |
Transistors
 |  |  | P-channel |
 |  |  | N-channel |
| JFET | IGFET enh | IGFET dep |
 | PNP |
 | NPN |
Switches
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| Open Switch | Closed Switch |
References
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