ee:eagle
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ee:eagle [2023/10/12 17:50] FKR@staff.hsrw |
ee:eagle [2023/10/22 15:05] 26364@students.hsrw |
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| We will use EAGLE to design a printed circuit board (PCB) in this lab. We will use a free version in the lab but Autodesk provides its professional version free of charge to students after registration: | We will use EAGLE to design a printed circuit board (PCB) in this lab. We will use a free version in the lab but Autodesk provides its professional version free of charge to students after registration: | ||
| - | https://www.autodesk.com/education/free-software/eagle | + | |
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| + | https://www.autodesk.com/products/eagle/free-download | ||
| + | https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Eagle-Education.html | ||
| EAGLE works in two steps, first, you have to create a schematic of your circuit. This is pretty straightforward as it uses standard primary symbols in its editor. The second step is positioning the components on a PCB and laying out (routing) the connections (traces) between them. | EAGLE works in two steps, first, you have to create a schematic of your circuit. This is pretty straightforward as it uses standard primary symbols in its editor. The second step is positioning the components on a PCB and laying out (routing) the connections (traces) between them. | ||
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| - | 12. Type '*LM358*' into the search box and press 'Enter.' note that using the asters symbol * will show all parts with 'LM358' in their data. Expand and select the device's through-hole (THT) version, 'LM358N,' and click 'OK.' Click anywhere in the blank area to create the op-amp device. click one more time to get two devices named 'IC1A' and 'IC1B.' | + | 12. Type '*LM358*' into the search box and press 'Enter.' note that using the asters symbol * will show all parts with 'LM358' in their data. Expand and select the device's through-hole (THT) version, 'LM358N,' and click 'OK.' Click anywhere in the blank area to create the op-amp device. click again to get two devices named 'IC1A' and 'IC1B.' |
| == please be aware that the LM358 schematic symbol is separated in two parts == | == please be aware that the LM358 schematic symbol is separated in two parts == | ||
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| 17. Click on the 'value' tool icon and then click on all resistors and capacitors to set their values. | 17. Click on the 'value' tool icon and then click on all resistors and capacitors to set their values. | ||
| - | 18. Click on the 'net' tool to draw wires between relevant terminals, following the circuit diagram. Click to terminate each wire. | + | 18. Following the circuit diagram, Click on the 'net' tool to draw wires between relevant terminals. Click to terminate each wire. |
| {{ :ee:eagle15.jpg |}} | {{ :ee:eagle15.jpg |}} | ||
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| {{ :ee:final.jpg |}} | {{ :ee:final.jpg |}} | ||
| - | 22. Your schematic should now be complete. Run an electrical rules check (ERC) to verify there are no mistakes. Click on the ’ERC’ button and make sure there are no errors and warnings you are not expecting. | + | 22. Your schematic should now be complete. Run an electrical rules check (ERC) to verify no mistakes. Click on the ’ERC’ button and make sure there are no errors and warnings you are not expecting. |
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| 2. When asked if you would like to create the ’.brd’ file, click ’Yes’. | 2. When asked if you would like to create the ’.brd’ file, click ’Yes’. | ||
| - | 3. You will see a blank (black) board and all of the components are in the lower left corner. The parts look different from the schematic because these are the actual footprints. It is the physical representation of a device and includes information about dimensions, holes, and copper areas that are needed to solder | + | 3. You will see a blank (black) board with all components in the lower left corner. The parts look different from the schematic because these are the actual footprints. It is the physical representation of a device and includes information about dimensions, holes, and copper areas that are needed to solder |
| the device. | the device. | ||
| - | 4. The first step is to set the grid to millimeters. In order to do that type ’grid mm;’ into the command line. | + | {{ :ee:b1.jpg |}} |
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| + | 4. The first step is to set the grid to millimeters. To do that type ’grid mm;’ into the command line. | ||
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| + | {{ :ee:b2.jpg |}} | ||
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| + | 5. The next step is reducing the board size to 40 by 40 mm. Right-click on an edge, choose ’properties’ and then set the values appropriately. When you are done the board should be a square. | ||
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| + | {{ :ee:b3.jpg |}} | ||
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| + | {{ :ee:b4.jpg |}} | ||
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| + | 6. Use ’move’ and ’rotate’ to place all components inside the square area. Start with the IC and the connector. The connector should be placed close to the border of the board. | ||
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| + | {{ :ee:b5.jpg |}} | ||
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| + | 7. Place connected components near each other to minimize path length and path crossings. The yellow lines mark the connections you will have to route later. | ||
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| + | {{ :ee:screenshot_53_.png?400 |}} | ||
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| + | 8. Click ’ ratsnest’ to force EAGLE to redraw the yellow lines. | ||
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| + | {{ :ee:b6.jpg |}} | ||
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| + | 9. Use the ’Text’ tool to add your matriculation number to the board to be able to identify it in the upcoming labs. Click right on it and select ’properties’. Change size to 3.81 and select ’vector’ | ||
| + | as font. | ||
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| + | {{ :ee:b11.jpg?600 |}} | ||
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| + | 10. After the last step the board may look like the picture below. | ||
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| + | {{ :ee:screenshot_423_.png?400 |}} | ||
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| + | 11. To set the default track size Go to Edit → net classes and change the width of the default net class to 0.8mm. | ||
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| + | {{ :ee:b13.jpg?600 |}} | ||
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| + | 12. The next step is routing. There are two different approaches to this problem. Manual routing is described here. | ||
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| + | • Use the ’Route’ tool to make the actual connections. Pay close attention to the color of the route. Blue routes are on the bottom side of the board (layer 16), and red are on the top (layer 1). | ||
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| + | • Since we want all our components to be on the top, the soldering for THT components will be on the bottom (layer 16) therefore all the connections for THT components should be on the bottom layer, and for SMD components on the top layer, you can use the ’Via’ tool to make a connection between top and bottom layer traces. The vias shall be round and have a diameter of 2.5 mm and a drill of 0.5 mm. | ||
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| + | • Traces shall have a width of at least 0.8 mm. If yours is smaller you can use the ’change’ tool to set a bigger width. | ||
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| + | • If a connection is made the yellow line should disappear. If it persists you have to look for the error. | ||
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| + | for a better and easier connection let’s define a ground plane on the bottom layer and top layer. use the ’polygon’ tool to make a rectangle around the dimension of your board. | ||
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| + | 13. Start by making GND polygons | ||
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| + | {{ :ee:screenshot_43_.png?400 |}}{{ :ee:screenshot_47_.png?400 |}} | ||
| - | 5. The next step is reducing the size of the board to 40 by 40 mm. Right-click on an edge, choose ’properties’ and then set the values appropriately. When you are done the board should be a square. | + | 14. start routing the connections |
| + | {{ :ee:screenshot_54_.png?400 |}} | ||
| + | {{ :ee:screenshot_55_.png?400 |}} | ||
| + | 15. don't forget to add via to connect top GND to bottom GND by adding via with GND as signal name | ||
| + | {{ :ee:screenshot_5_.png?400 |}} | ||
ee/eagle.txt · Last modified: 2023/10/22 17:32 by 26364@students.hsrw
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