602677295-Technical-Drawing-Powerpoint.pptx

Entendimiento de Dibujos Técnicos

1. Technical Drawing

2. Technical drawing / Drafting A technical drawing, also known as an engineering drawing, is  a detailed, precise diagram or plan that conveys information about how an object functions or is constructed . Engineers, electricians, and contractors all use these drawings as guides when constructing or repairing objects and buildings.

3. Examples: Floor plan Schematic Diagram

4. Electrical diagram / circuit diagram 

5. CIRCUIT DIAGRAM is a graphical representation of an electrical circuit. Circuit diagrams are used for the design (circuit design), construction (such as PCB layout), and maintenance of electrical and electronic equipment.

6. There are four basic types of ELECTRICAL diagrams: Schematic diagram Wiring diagram Block diagram Pictorial diagram

7. Schematic Diagrams It shows the components and interconnections of the circuit using standardized symbolic representations. The presentation of the interconnections between circuit components in the schematic diagram does not necessarily correspond to the physical arrangements in the finished device. This diagram shows the circuit components on horizontal lines without regard to their physical location. It is used for troubleshooting because it is easy to understand the operation of the circuit. The loads are located on the far right of the diagram, and the controls for each load are located to the left. To understand the sequence of operation, the drawing is read from the upper left corner and then from left to right, and from top to bottom.

8. Schematic Diagrams It shows the components used in their interconnection. Each graphic symbol is also accompanied with a reference designation to distinguish it from other similar symbols. It does not illustrate the physical size, shape or chassis location of the component parts and devices.

9. EXAMPLE OF A SCHEMATIC DIAGRAM OF A SIMPLE CIRCUIT CONNECTION

10. Make sure to be familiar with all the schematic symbols of the different electronic components

11. Block diagrams A block diagram is a diagram of a system in which the principal parts or functions are represented by blocks connected by lines that show the relationships of the blocks. This diagram indicates by functional descriptions, showing which components must operate first in order to get a final outcome. They do not refer to specifics like device symbols or related wire connections. Block diagrams are typically used for higher level, less detailed descriptions that are intended to clarify overall concepts without concern for the details of implementation. This form uses block rectangles or triangles to represent components, group of components or units of equivalent. Block diagrams are particularly used to represent internal components of an integrated circuit.

12. Example of a block diagram of a simple circuit 12 V Power Supply 3 Ω resistor Voltmeter Ammeter

13. Wiring diagrams The wiring diagram shows the relative layout of the circuit components using the appropriate symbols and the wire connections. Although a wiring diagram is the easiest to use for wiring an installation, it is sometimes difficult to understand circuit operation and is not as applicable for troubleshooting. It shows wiring connection in a simplified, easy to follow manner. It may show either internal or external connections or both and is usually drawn as simple as possible to trace out the connection of a circuit. The components of the circuit are identified by name or are represented by means of pictorial illustrations that do not follow any well-defined standard form.

14. Simplier example of a wiring diagram

15. Pictorial diagrams A pictorial circuit diagram uses simple images of components A pictorial diagram shows the circuit components in more detail, as they really look, and indicates how the wiring is attached. These diagrams can be used to locate components in a complex system. It shows the pictures of the actual components and wiring connections although it does not provide the exact size of components. Sometimes, it shows exact shape in proportion to the actual one.

16. Example of a pictorial diagram of a simple circuit

17. Example of a pictorial diagram of a simple circuit

18. Comparison of a schematic and a pictorial diagram

19. SELF-CHECK

20. 1. What diagram is shown?                                                    

21. 2. What diagram is shown?         AC   Input   DC   Outpu t   T ransformer   Stage     Rectifier   Stage     Filter   Stage  

22. 3. What diagram is shown?

23. 4. What diagram is shown?

24. 5. Make a block diagram of the given pictorial diagram of a doorbell wiring by filling in the blank boxes. 1. 3. 2.

25. EVALUATION ½ Crosswise

26. Make a Block diagram and a pictorial diagram of the given schematic circuit Single cell Power Supply SPST switch lamp Legend:

27. Make a schematic diagram of the given block diagram by labelling the components presented. 1. 2. 3. 4. 5.