| A | B |
|---|
| Resistor | Acts like an electronic sponge |
| Potentiometer | Variable resistor |
| Capacitor | Acts like a temporary battery |
| Diodes | Allows current to flow in one direction. |
| Cathode | Negative polarity |
| Anode | Positive polarity |
| Transistor | Amplifies or acts like a switch |
| Two types of transisors | Power and General purpose |
| Relay | Electro-magnetic switch |
| Speaker | Changes electrical energy into sound |
| Lamp | Changes electrical energy into light energy. |
| Transformer | Increase or decreases current and voltage. |
| Nicad | Rechargeable battery |
| Negative terminal | Short line of a schematic symbol for a battery. |
| Mercury battery | Used in digital watches, etc. |
| Dual Inline Package (DIP) | Most common IC chip package |
| Integrated Circuit (IC) | Consolidates a large circuit into a very small package. |
| Schematic drawing | Electronic representation of a circuit. |
| Pictorial drawing | Picture of the circuit |
| Block diagram | Indicates the rlationship between various stages in an electronic system. |
| Wiring diagram | shows wiring connections in a simplified manner. |
| Ohms | Resistance measurement. |
| Resistor wattage rating | Determined by size. |
| Disc capacitors | non-polarized |
| Electrolytic capacitors | polarized |
| Kilo | one thousand |
| Mega | one million |
| milli | one thousandth |
| micro | one millionth |
| Current flows | Against the arrow |
| Short lead on an LED | Is the cathode. |
| Long lead on an LED | Is the anode. |
| The gate of an SCR | needs a postive voltage for the SCR to conduct |
| Gate | Located on the beveled edge of an SCR |
| Two types of transistors | NPN and PNP |
| The arrow of a Transisor | Is the emitter |
| E B C | Emitter, Base, Collector |
| The Dot on an IC Chip | Is pin one. |
| IC Socket | Eliminates the danger of overheating the IC when soldering. |
| Remove power | To turn off an SCR |
