Circuit Diagrams - Electric Circuit Components, Schematic Symbols - PDF

Circuit Diagrams A printed circuit board (PCB) contains components with specific functions to make a device work. 2 How is a circuit diagram drawn? 3  Electric Circuits Circuitry or the system of circuits may be presented using using words, p...

Circuit Diagrams A printed circuit board (PCB) contains components with specific functions to make a device work. 2 How is a circuit diagram drawn? 3  Electric Circuits Circuitry or the system of circuits may be presented using using words, pictures, or diagrams. 4  Electric Circuits A circuit diagram is a graphic representation of an electric circuit. It is also called as: electrical diagram elementary diagram electronic diagram 5  Terminologies in Circuitry Circuit It refers to the system of components, power, and signal sources that enable the current to flow around. 6  Terminologies in Circuitry Closed Circuit implies that the circuit is complete current can freely go around 7  Terminologies in Circuitry Open Circuit implies that the circuit is incomplete there is a gap somewhere in the path 8 How can you differentiate an open circuit, a closed circuit, and a short circuit in a schematic diagram? 9  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol connected to an Bulb electric power supply Cell (DC voltage device that generates source) electricity 10  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol Battery (DC composed of two or voltage source more cells Connecting wire allows current to flow 11  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol two-terminal Capacitor electrical component for energy storage (either of the two) controls the flow of Resistor electric current 12  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol Standard diode: allows electric current to flow in one Diode direction while Light-emitting diode stopping it in the (LED): other direction 13  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol amplifies/switches Transistor electronic signals and power resists AC while Inductor permitting DC to pass 14  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol represent logical Logic Gates functions/decisions 15  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol turns the flow of Switch electricity on or off trades voltage for Transformer current or vice versa 16  Components of a Circuit Diagram Components of a Circuit Diagram Component Definition Schematic Symbol device used to Ammeter measure current device used to Voltmeter measure potential difference 17 What are the different components of an electric circuit? 18 Junctions between lines are connected by dots to show connections 19  Schematic Wire Junctions Components of a Circuit Diagram Schematic Symbol Definition wires are connected; there is a connection wires are not connected, no connection 20  Schematic Wire Junctions Components of a Circuit Diagram Schematic Symbol Definition horizontal wire hops over the vertical; no connection double junction; shows joined crossing wires 21 Constructing Circuit Diagrams Accurately presents the design of the circuit Follows the GOOD general SCHEMATIC conventions DIAGRAM Offers simplification whenever possible 22  Constructing Circuit Diagrams Major conventions used when drawing schematics: 1. Collect the relevant electrical symbols from the circuit. 2. Place the symbols in the diagram and connect them with appropriate lines and junctions. 3. Inputs are generally placed on the left part of the diagram, and the outputs on the right. 23 What are the characteristics of a well-drawn circuit diagram? 24 Draw the appropriate schematic diagram for the pictorial diagram below. 25 Draw the appropriate schematic diagram for the pictorial diagram below. 26 Draw a schematic diagram for the circuit below: 27 Draw the appropriate schematic diagram for the pictorial diagram below. Assume that the switch is closed. 28 Draw the appropriate schematic diagram for the pictorial diagram below. Assume that the switch is closed. 29 Draw the schematic diagram that corresponds to the pictorial diagram below. Assume that the switch is closed. 30 Draw a schematic diagram that corresponds to the pictorial diagram below. Assume that the switch is open. 31 Draw a schematic diagram that corresponds to the pictorial diagram below. Assume that the switch is open. 32 Draw a schematic diagram that corresponds to the pictorial diagram below. Assume that the switch is open. 33 Identify whether each of the following statements is true or false. 1. The word circuit is derived from the word circle. 2. In order for a circuit to work, it should be closed. 3. A circuit diagram refers to a graphic representation of an electric circuit. 34 Draw the correct symbol for each of the electric components below. 1. battery (two cells) 2. capacitor 3. transformer 35  Circuitry, or the system of circuits, may be described verbally or diagrammatically. A circuit diagram, or the graphic representation of an electric circuit, is also called an electrical diagram, elementary diagram, or electronic diagram. A circuit refers to the system of components, power and signal sources that enable the 36  A good schematic has the following characteristics: (1) accurately represents the design of the actual circuit; (2) follows the general convention for constructing circuit diagrams; and (3) offers simplifications wherever possible. 37  Some of the major conventions to observe when drawing schematics are as follows: ○ Begin by collecting the relevant electrical symbols from the circuit. ○ Place these symbols in your diagram and connect them with appropriate lines and junctions. 38 ○ Inputs are generally preferred to be placed on the left part of the diagram, and the outputs on the right. 39