DC Circuits
DC Circuits
DC circuits (Direct current circuits) are loops of conducting wires through which direct current flow. Direct current is unidirectional flow of charge. The sources through which we get direct current are: battery, solar cells, thermocouples, DC Dynamos and so on. Most of the automotive and electronic circuits required DC supply. In this tutorial, you will learn to use AutoCAD Electrical for creating DC circuit of Idle Air Control System used by cars.
Creating a Component for a Library 1. To start, open the 04 DC Circuits.dwg drawing file.
2. To access a block symbol: • At the command line, enter I or Insert. • In the Insert dialog box, next to Name, click Browse. • Navigate to the folder where your exercise files are installed and click Battery. • Click Open.
3. To add the symbol to the drawing: • In the Insert dialog box, click OK. • Place the symbol as shown.
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4. To begin converting a symbol from a library into an electrical component: • On the Other Tools panel, click Symbol Builder. • Review the other options in the Select Symbol dialog box. • Click OK.
5. To define the symbol, In the Symbol Builder Attribute Editor, for TAG1, enter BATTERY.
6. To begin to assign connection points: • In the Symbol Builder Attribute Editor, scroll down to Wire Connection • Click Insert Wire Connection. Page 2
7. To define the connection points: • Click the left vertical line near the negative symbol (1). • Enter R. • Click the right vertical line near the positive symbol (2). • Right-click and click Enter.
8. On the Close panel, click Close Block Editor. 9. To save as a local electrical symbol: • In the Close Block Editor dialog box, under Symbol, for Unique Identifier enter BATTERY. • For Symbol name, enter BATTERY. • Under Image, for Name (.png) enter BATTERY. • Click OK. When prompted to insert the symbol, click Yes.
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10. Locate the new battery to the left of the first battery.
11. To begin importing the symbol into the permanent library: • On the Other Tool panel, click Icon Menu Wizard. • Review the information in the Select Menu file dialog box. • Click OK. 12. In the Icon Menu Wizard dialog box, click Power Supplies.
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13. With Power Supplies displayed: • Expand Add and select Component. • In the Add Icon – Component dialog box, for Name and Image File, enter BATTERY. • Under Icon Details, click Pick. • Select the Battery symbol on the left.
14. Under Block Name to Insert, for Block Name, enter BATTERY. 15. Click OK.
16. In the Icon Wizard Menu, click OK. 17. Delete the two battery symbols in the drawing canvas.
Completing the DC Circuit
18. To add the battery symbol: • • • •
Click Icon Menu. In the Insert Component dialog box, click Power Supplies. Click the new Battery symbol. Locate the battery symbol at the end of red wire as shown.
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19. Click Icon Menu. • •
In the Insert Component dialog box, check Vertical. For Scale Schematic, enter 2.000.
20. In the Insert Component dialog box: • • •
Click Miscellaneous. Click Ground. Locate the ground symbol below and to the left of the battery.
21. For Component Tag, enter GND and then click OK. 22. To move the battery to a better position: • • •
On the Edit Components panel, expand Scoot Click Move Component. Select the Battery and move it to the left.
23. To update the wire connection, click the wire. Select the left grip point and drag it to the battery. Page 6
24. Add a normally open push button as shown. Clear the Vertical setting and for the tag, enter IGN.
25. Click Icon Menu > Relays/Contacts > Solid State Relay. • •
Place the relay as shown. Click OK.
26. To place two fuses at once: • •
On the Insert Components panel, click Multiple Insert. Navigate to Fuses/Circuit Breakers/Transformers > Fuse (Tag).
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27. Begin by clicking to draw a line over both sets of wires as shown, then press Enter.
28. When prompted with the Keep? dialog box, click OK. In the Insert/Edit Component dialog box, set the Component Tag to FU1 and the Rating to 10A, then click OK. 29. Repeat the same process for the second fuse. Use the tag FU2 and set the Rating to 5A, then click OK.
30. Click on the wire tool: •
To start the wire, select the intersection shown (1).
•
If the wire direction is not correct, enter V.
•
Connect the wire to the relay as shown (2).
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31. Add another wire as shown.
32. To begin to add a connector: • • • • • • • •
On the Insert Components panel, click Insert Connector. In the Insert Connector dialog box, for Pin Spacing, enter 2. Verify that Pin Count is set to 3. Expand the dialog box. Under Type, select Plug/Receptacle Combination. Under Display, for Connector, select Horizontal. For Plug, select Top. For Pins, select Plug Side.
33. Click Insert. Place the connect below and to the left of the existing connector.
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34. In the Insert/Edit Component dialog box: • • •
For Component Tag enter PL2. For Description, Line 1 enter Sensors. Click OK.
35. To add wires: • • •
Click Multiple Bus. For vertical and horizontal spacing enter 2.000. Click OK.
36. Window select the pins on the horizontal connector. Then window select pins 4-6 on the vertical connector and right-click.
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37. To flip the wire direction, enter F. Click the horizontal connector.
38. Use the wire tool to place a wire as shown.
39. To begin assigning the newly connected wires as ground wires, on the Edit Wires/Wire Numbers panel, expand Create/Edit Wire Type and select click Change/Convert Wire Type. Page 11
40. In the Change/Convert Wire Type dialog box, select any cell in line 4: 16AWG-BLK and select the three wires shown.
41. In canvas, right-click. 42. If time permits, continue to change wire colors as needed.
43. Click Create/Edit Wire Type. Page 12
• •
Select 10AWG-BLK. Under Layer, click Mark Selected as Default.
•
Click OK.
44. Use the Wire tool and create a new wire connecting the open pole of the battery.
45. End of Exercise. Close all files. Do not save changes.
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DC circuits (Direct current circuits) are loops of conducting wires through which direct current flow. Direct current is unidirectional flow of charge. The sources through which we get direct current are: battery, solar cells, thermocouples, DC Dynamos and so on. Most of the automotive and electronic circuits required DC supply. In this tutorial, you will learn to use AutoCAD Electrical for creating DC circuit of Idle Air Control System used by cars.
Creating a Component for a Library 1. To start, open the 04 DC Circuits.dwg drawing file.
2. To access a block symbol: • At the command line, enter I or Insert. • In the Insert dialog box, next to Name, click Browse. • Navigate to the folder where your exercise files are installed and click Battery. • Click Open.
3. To add the symbol to the drawing: • In the Insert dialog box, click OK. • Place the symbol as shown.
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4. To begin converting a symbol from a library into an electrical component: • On the Other Tools panel, click Symbol Builder. • Review the other options in the Select Symbol dialog box. • Click OK.
5. To define the symbol, In the Symbol Builder Attribute Editor, for TAG1, enter BATTERY.
6. To begin to assign connection points: • In the Symbol Builder Attribute Editor, scroll down to Wire Connection • Click Insert Wire Connection. Page 2
7. To define the connection points: • Click the left vertical line near the negative symbol (1). • Enter R. • Click the right vertical line near the positive symbol (2). • Right-click and click Enter.
8. On the Close panel, click Close Block Editor. 9. To save as a local electrical symbol: • In the Close Block Editor dialog box, under Symbol, for Unique Identifier enter BATTERY. • For Symbol name, enter BATTERY. • Under Image, for Name (.png) enter BATTERY. • Click OK. When prompted to insert the symbol, click Yes.
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10. Locate the new battery to the left of the first battery.
11. To begin importing the symbol into the permanent library: • On the Other Tool panel, click Icon Menu Wizard. • Review the information in the Select Menu file dialog box. • Click OK. 12. In the Icon Menu Wizard dialog box, click Power Supplies.
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13. With Power Supplies displayed: • Expand Add and select Component. • In the Add Icon – Component dialog box, for Name and Image File, enter BATTERY. • Under Icon Details, click Pick. • Select the Battery symbol on the left.
14. Under Block Name to Insert, for Block Name, enter BATTERY. 15. Click OK.
16. In the Icon Wizard Menu, click OK. 17. Delete the two battery symbols in the drawing canvas.
Completing the DC Circuit
18. To add the battery symbol: • • • •
Click Icon Menu. In the Insert Component dialog box, click Power Supplies. Click the new Battery symbol. Locate the battery symbol at the end of red wire as shown.
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19. Click Icon Menu. • •
In the Insert Component dialog box, check Vertical. For Scale Schematic, enter 2.000.
20. In the Insert Component dialog box: • • •
Click Miscellaneous. Click Ground. Locate the ground symbol below and to the left of the battery.
21. For Component Tag, enter GND and then click OK. 22. To move the battery to a better position: • • •
On the Edit Components panel, expand Scoot Click Move Component. Select the Battery and move it to the left.
23. To update the wire connection, click the wire. Select the left grip point and drag it to the battery. Page 6
24. Add a normally open push button as shown. Clear the Vertical setting and for the tag, enter IGN.
25. Click Icon Menu > Relays/Contacts > Solid State Relay. • •
Place the relay as shown. Click OK.
26. To place two fuses at once: • •
On the Insert Components panel, click Multiple Insert. Navigate to Fuses/Circuit Breakers/Transformers > Fuse (Tag).
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27. Begin by clicking to draw a line over both sets of wires as shown, then press Enter.
28. When prompted with the Keep? dialog box, click OK. In the Insert/Edit Component dialog box, set the Component Tag to FU1 and the Rating to 10A, then click OK. 29. Repeat the same process for the second fuse. Use the tag FU2 and set the Rating to 5A, then click OK.
30. Click on the wire tool: •
To start the wire, select the intersection shown (1).
•
If the wire direction is not correct, enter V.
•
Connect the wire to the relay as shown (2).
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31. Add another wire as shown.
32. To begin to add a connector: • • • • • • • •
On the Insert Components panel, click Insert Connector. In the Insert Connector dialog box, for Pin Spacing, enter 2. Verify that Pin Count is set to 3. Expand the dialog box. Under Type, select Plug/Receptacle Combination. Under Display, for Connector, select Horizontal. For Plug, select Top. For Pins, select Plug Side.
33. Click Insert. Place the connect below and to the left of the existing connector.
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34. In the Insert/Edit Component dialog box: • • •
For Component Tag enter PL2. For Description, Line 1 enter Sensors. Click OK.
35. To add wires: • • •
Click Multiple Bus. For vertical and horizontal spacing enter 2.000. Click OK.
36. Window select the pins on the horizontal connector. Then window select pins 4-6 on the vertical connector and right-click.
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37. To flip the wire direction, enter F. Click the horizontal connector.
38. Use the wire tool to place a wire as shown.
39. To begin assigning the newly connected wires as ground wires, on the Edit Wires/Wire Numbers panel, expand Create/Edit Wire Type and select click Change/Convert Wire Type. Page 11
40. In the Change/Convert Wire Type dialog box, select any cell in line 4: 16AWG-BLK and select the three wires shown.
41. In canvas, right-click. 42. If time permits, continue to change wire colors as needed.
43. Click Create/Edit Wire Type. Page 12
• •
Select 10AWG-BLK. Under Layer, click Mark Selected as Default.
•
Click OK.
44. Use the Wire tool and create a new wire connecting the open pole of the battery.
45. End of Exercise. Close all files. Do not save changes.
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