 | Wire - An efficient path for current. |
 | Wires with no join - The preferred method is the hump method as the other can be confused more easily. |
 | Wires with join - Indicates a physical connection that allows current to pass through. |
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 | Power DC - Unlimited supply of electrical energy with the current always flowing in one direction. |
 | Power AC - Unlimited supply of electrical energy with the current constantly changing direction. |
 | Battery - Limited supply of electrical energy from or more cells. |
 | Cell - Limited supply of electrical energy. |
 | Ground - Connections to earth, 0 Volts or the real ground depending on the circuit. |
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 | Diode - Restricts current to flow in one direction only. |
 | LED - Converts electrical energy to light. |
 | Photodiode - A photo(light) sensitive device that restricts current to flow in one direction only dependant on light levels. |
 | Zener Diode - A diode use to maintain fixed voltage across its terminals. |
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 | Resistor - Used to restrict current flow. |
 | Rheostat - Used to restrict current flow to varying degrees but with only two contacts. |
 | Potentiometer - Used to restrict current flow to varying degrees but with three contacts. |
 | Preset Variable Resistor - Used to restrict current flow to varying degrees but to be set once and left. |
 | Thermistor - Used to restrict current flow to varying degrees depending on temperature it is exposed to. |
 | Light Dependent Resistor - Used to restrict current flow to varying degrees depending on the amount of light it is exposed to. |
 | Heater - Converts electrical energy into heat. |
 | Fuse - When current that exceeds the fuses ratings passes through it breaks the circuit. Used for safety |
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 | Lamp, Lighting - Converts electrical energy into light |
 | Lamp, Indicator - Converts electrical energy into light for the purpose of a warning |
 | Motor - Converts electrical energy into mechanical energy |
 | Inductor (Coil, Solenoid) - A coil of wire that creates a magnetic field when current passes through it. |
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 | Oscilloscope - A meter that displays the shape of electrical signals over time. |
 | Galvanometer - A meter that displays the very small currents less than 1mA. |
 | Voltmeter - A meter that displays the voltage difference between two points. |
 | Ohmmeter - A meter that displays the current flow between two points. |
 | Ammeter - A meter that displays the resistance between two points. |
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 | And - A Logic circuit that takes two inputs, if the are both high then output is high, all other cases produce a low. (00=0 01=0 10=0 11=1) |
 | Or - A Logic circuit that takes two inputs, if either or both are high then output is high, all other cases produce a low. (00=0 01=1 10=1 11=1) |
 | NAnd - A Logic circuit that takes two inputs and produces the opposite results of AND. (00=1 01=1 10=1 11=0). An interesting note, your computer CPU is built entirely out of the gates. |
 | Nor - A Logic circuit that takes two inputs and produces the opposite results of OR. (00=1 01=0 10=0 11=0). |
 | Not - A Logic circuit that takes one input, if it is high it output a low and if it is high it outputs a low. (0=1 1=0) |
 | Xor - A Logic circuit that takes two inputs, if either but not both are high then output is high, all other cases produce a low. (00=0 01=1 10=1 11=0) |
 | NXOr - A Logic circuit that takes two inputs and produces the opposite results of XOR. (00=1 01=0 10=0 11=1) |
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 | Switch (SPST) - A switch that allows current to flow only in the close position. Will retain the state once it is changed. |
 | Switch 2 Way (SPDT) - A switch that allows current to flow between two different paths. Will retain the state once it is changed. |
 | Switch Push - A switch that allows current to flow only in the close position (only when pressed). Will return to the open state. |
 | Switch Push to Break - A switch that allows current to flow only in the close position (only when not pressed). Will return to the closed state. |
 | Switch Dual On/Off (DPST) - A switch that allows current to flow through from two wires only in closed position. Will retain the state once it is changed. |
 | Switch Reversing (DPDT) - A switch that allows current to flow through from two wires each through two different paths. Will retain the state once it is changed. |
 | Dial - A switch that allows current to flow to multiple destinations from one source. Will retain the state once it is changed. |
 | Relay - A switch that is triggered buy an electric current that allows current to flow from one source to two different destinations. Will return to it's original state once the current flow stops. NO-Normally open. NC-Normally Closed COM-Common |
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 | Transistor NPN - Used as a switch or to amplify current (a small current switches the larger one on). |
 | Transistor PNP - Used as a switch or to amplify current (a small current switches the larger one on). |
 | Photo transistor - Used to amplify current or as a switch, triggered by light. |
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 | Capacitor - Stores electrical charge. |
 | Capacitor, Polarised - Stores electrical charge but must be place the right way round. |
 | Capacitor, Trimmer - Stores a variable electrical charge to be set once and left. |
 | Capacitor, Variable - Stores a variable electrical charge to be adjusted constantly. |
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 | Piezo Transducer - A transducer that converts electrical energy to sound energy. |
 | Transformer - Two sets of coiled wires separated by an iron core with no connection between the wires used to change AC voltages up and down. |
 | Speaker - A transducer that converts electrical energy to sound energy. |
 | Earphone - A transducer that converts electrical energy to sound energy. |
 | Microphone - A transducer that converts sound energy to electrical energy. |
 | Amplifier - A summarized circuit of transistors with one input and one output that increases the input current. |
 | Bell - A transducer that converts electrical energy to sound energy. |
 | Buzzer - A transducer that converts electrical energy to sound energy. |
 | Antenna - Transmits or receives radio signals. |
