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eagle pcb manual routingAre you the puzzle master that is going to rise to the challenge in PCB Layout Basics Part 2? Now that you’ve placed all your parts on your PCB design, it’s time to start connecting your components together with traces. Just like component placement, routing is an equally creative endeavor that will tap into both your scientific and artistic skills. You’ll be working with precise trace angles, specific clearances, and mathematical copper calculations. And once you’ve got the details defined, you can then turn on the artistic side of your engineering mind and get down to connecting your beautiful puzzle together. Let’s look at how you can either manually route, or autoroute, your PCB design. Remember these details before you start your journey: Check out all of the airwires in the image below; they define connection paths between components. Another way Autodesk EAGLE makes your job easier! All elements that belong to the net are highlighted in bright green, giving you an easy to follow map of your locations for your routes. However, it’s by no means a replacement for getting your hands dirty and routing your board. What are some of the great applications for the autorouter in Autodesk EAGLE? After placing all of your components, you can then use the autorouter to see how optimized your components are placed. If the autorouter returns a completion result of 85 or greater than you know you did a good job of placing your parts. If not, consider pushing your parts around. You can also use the autorouter to identify bottlenecks and other critical connection points that you might have missed when placing your components. Maybe you packed a couple of ICs too close together. Your autorouter can show you where you might need to leave more space between components. You can always fire up the autorouter to see how it takes care of the job, then try routing that same spot yourself with your new perspective.http://www.biff.it/public/crash-of-the-titans-instruction-manual.xml
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You might just find a strategy for your traces that you didn’t see before your autorouter gave it a try. This holds true especially as your designs start to get more complex. Instead of forming an unhealthy dependency on your autorouter from the get go, just know that it’s meant to be used in specific situations to augment your abilities, not replace them. Select the Start button to begin the autorouting process. This is a pretty simple design so your autorouter should get to 100. On more complex designs, you can expect this number to be lower. As you can see, the autorouter can do a decent job on a simple design like your LED Flasher, but you won’t be making simple designs forever, so let’s learn how to route manually.Just type RIPUP; in the command line and all of your routed traces will convert back to airwires. Your job is simply to connect the airwires together that Autodesk EAGLE highlights for you. But the challenge is figuring out how to connect all of them without any overlapping connection points (shorts). Here’s how to connect a trace between two nets: You can also select your desired routing layer in the top-left corner of your interface with the Layer Selection dropdown. You’ll notice that Autodesk EAGLE will highlight that net and the pads to connect. By default you’ll be using a 90-degree trace, if you right-click, you can change your trace angle to a different angle. Notice the airwire is now gone. You can go ahead and repeat the five steps above now and see how far you can get with routing your board. Why would you need to use vias though. They’re ideal for situations where you don’t have a way to connect a trace without having it intersect with another trace, which can end up creating a short on your board. By using a via, you can instead go under or above this existing trace by connecting a signal between the top and bottom layers of your board. Here’s how: You can change the shape or your via along with its diameter and drill size.http://www.harom.ro/files/crash-nitro-kart-manual.xml Adjust these as you need. You’ll notice that it’s now a different color, signifying that you’re routing on a different layer of your board. We could have also started routing directly on the bottom layer from C1. Now it’s time to learn how to delete traces.Let’s try it: You’ll notice that the last segment you placed gets removed. And you can keep pressing Backspace to remove the other segments you placed. You can continue left-clicking to on each segment to continue to remove them as needed. You learned how to do some basic manual routing with traces and vias, and also how to delete traces both during and after your routing process. Now’s your chance to get creative. Spend as much time as you need connecting all of your airwires together on your PCB layout to solve your routing puzzle. Remember, there’s no right or wrong way to complete this stage of your PCB layout process, which is also what makes it so challenging. It’s a unique representation of your engineering creativity. What matters most is that all of your nets are properly connected. Just like the component placement process, every time you route your board you’ll get a different result and a deeper level of confidence. And the more you practice, the more you’ll start to see the intricate details and pathways that your traces can take that you never realized before. At this stage, your PCB design software process is largely complete. The only remaining parts to do is check your design for errors with a Design Rule Check (DRC), and add some finishing cosmetic touches. Join us for PCB Layout Basics Part 3 to learn all about this and more! Get the full experience today by subscribing to Autodesk EAGLE. Are wind farms worth the investment, or are they eyesores in natural landscapes? Check out our Desktop Library updates. Learn about the top 10 DFM mistakes now, so you don’t make them in the future.http://www.raumboerse-luzern.ch/mieten/bose-wave-music-system-iii-manual-pdf This is still true today, and the placement of your components will end up deciding how much time your routing will take, but that doesn’t mean that routing your PCB is any less important. It’s simply a matter of how much time you spend on each activity. Use these top 10 PCB routing tips and also our top 10 component placement tips to make your first PCB layout a success. If it’s below 85, then this is an indication that you need to make some adjustments to your part placement. A quick run through the autorouter might show you a new path that you hadn’t considered before. Why? It’s not always the most accurate, and if you’re a fan of symmetry, then your autorouter will most likely disappoint. And most importantly, you’re the master of your design, and you’ll be able to produce way better results by doing the routing process yourself. It’s a carefully crafted process that requires some love and attention to get the results you want. There’s nothing more satisfying than designing a beautiful board like this one. And by using trace widths and spacing that your manufacturer can produce, you’ll make everyone’s life easier when it comes time to make your board. Controlling the width of your traces is one of many ways to reduce how much heat builds up on your board, and the wider your traces, the less resistance that electricity will encounter when flowing through your circuit. So long as you meet your manufacturer’s requirements then the larger your traces are, the less likely you are to get a board back with broken connections. Why? If you pack things too close together, then you’ll run the risk of a short circuit developing when your board gets manufactured and traces unintentionally connect. As a bare minimum, we recommend always leaving a gap of 0.007” to 0.010” between all adjacent pads and traces on your board.http://chougantravel.com/images/canon-reflex-zoom-8-manual.pdf There’s no reason to not turn on your visible grid snap, and you’ll thank yourself later when you start to work with denser board layouts that need precise placement of traces and parts. You can also set your alternative spacing to 0.025” when you need to design a tightly spaced connection between components. And of course, always have your visible grid set to On! Why? When you have a bunch of traces that have a sharp, right angle turn on your board, the outside corner of that 90-degree angle has the likelihood of being etched narrower than your standard trace width. And at its worst, you might get a bunch of 90-degree traces back that aren’t fully etched, resulting in shorts. This will produce some beautiful PCB layouts while also making your manufacturer’s life easier by being able to easily etch away all of the copper on your board. If you didn’t, you might run the risk of creating a shock hazard on your board, and relying on the soldermask as your one and the only insulator isn’t a guarantee of safety. So when working with mounting holes, always remember to leave a ring of space beyond the physical dimensions of the mounting hole to protect it from other components and traces nearby. This comes in handy if you’re working with an analog circuit as your first design. If you use traces to route to ground instead of using a ground plane, you’ll find yourself with a multitude of different ground connections on your board, all with their own resistance values and voltage drops, which can be a nightmare. This can be a large copper area on a single layer board or even an entire layer dedicated as a ground plane on multilayer boards. And once your ground plane has been added, it’s simply a matter of connecting all of your components that need to go to ground with vias. All of the vias can easily connect to this large surface area. ( Image source ) Why? Both power and ground traces will have more current flowing through them, and if you don’t make them wider than average, you’ll get a ton of heat trying to flow through those skinny spaces, which can end up burning wires and ruining your board. Not only are vias ideal for providing electrical connectivity between layers, but they’re also the perfect tool to use when you need to move heat from one side of your board. By placing multiple vias below the die of an IC, you’ll be able to lower the operating temperature of a component, which will, in turn, make your design all that more reliable in the long run. Did you remember to give all of your integrated circuits enough room to have all of their pins connected. And do those mounting holes have enough space. Considering all of these questions and more will help to turn your first PCB design process into a success. Just like the component placement process, you’ll likely find that PCB routing is just as creative and artistic, and there’s nothing like seeing a gorgeous PCB layout with 45-degree traces dancing all over the place. But remember, that sought-after symmetry will come at a cost to your time, but it’s worth it. So remember to avoid that itch of using the autorouter and route your board manually! Try Autodesk EAGLE for free today! Are wind farms worth the investment, or are they eyesores in natural landscapes? Check out our Desktop Library updates. Learn about the top 10 DFM mistakes now, so you don’t make them in the future. It's like solving a puzzle. Our job will be turning each of those gold airwires into top or bottom copper traces. At the same time, you also have to make sure not to overlap two different signals. Wider traces can allow for more current to safely pass through. If you need to supply 1A through a trace, it'd need to be much wider (to find out how much, exactly, use a trace width calculator ). You finish the trace by left-clicking again on top of the other pin the airwire connects to.Remember that all of these copper traces are basically bare wire. If two signals overlap, they'll short out, and neither will do what it's supposed to. It's perfectly acceptable for a trace on the top side to intersect with one on the bottom. That's why there are two layers! We use them mid-route to move a trace from one side of the board to the other. Then you can either change the layer manually in the options bar up top, or click your middle mouse button to swap sides. And continue routing to your destination. EAGLE will automatically add a via for you. As a good rule-of-thumb, if you don't have enough space between two traces to fit another (not saying you should), they're too close together. If you need to go back and re-work a route, use the RIPUP tool -- -- to remove traces. This tool turns routed traces back into airwires. Go have the time of your life solving the routing puzzle. You may want to start on the closest, easiest traces first. Or, you might want to route the important signals -- like power and ground -- first. Here's an example of a fully-routed board: Make your board smaller. Or try to avoid using any vias. We'll cover those on the next page. Open up the autorouter, don't worry about these other tabs for now, just click OK. After running the autorouter, check the bottom-left status box to see how it did. If your autorouter couldn't finish the job, try turning Routing Grid down from 50mil 10mil. If you want to dig deeper into the subject, consider checking out EAGLE's manual where an entire chapter is devoted to it. It only takes a minute to sign up. It is not currently accepting answers.Update the question so it can be answered with facts and citations by editing this post.I've read many general tips (about using jumpers for example) to use while routing, however I want a precise step by step procedure I can follow to manually do the routing for any circuit. Should i for example start by one part of the schematic and look at his corresponding part in the board. Any ideas? If there was a concrete step by step process, it would be used by the autorouter. I think people here could provide things more in lines of strategy or order of operation. Once my component placement is OK, I like to autoroute over and over to try to get general solutions with few vias, and then hand route for nice looking swoopy traces and sich. If not defined by an enclosure, you may need to tweak it later on, but start with what you think you'll need. This would also be the time to determine how many layers you need and configure accordingly. Usually you want to place these in a specific location on the board, to make it neat and clean (in a logical manner for human interface). Pick which one you want to start with. You may have to break the larger section up into smaller groups, depending on the size. For example, the Power section of the schematic may have several voltage regulators, so do one regulator with its requisite circuitry as one group. Don't worry about the connections that go to different sections yet, just route what will be self-contained within that group. I normally do this right after I place all component sections on the board. This will minimize the airwires for ground or power that are visible and make it easier to identify which connections go group-to-group. However, the process mentioned above should help you get started with routing just about any board. Place them outside of the board Dimension lines. Do to not run Gnd traces all over the board.Browse other questions tagged eagle routing or ask your own question. Is this an act of discrimination?How should I tell manager? College London Tutorial assumes that you have already read and followed the Guide, and so are familiar with EAGLE operation. See. Section 5 below for details of what PCBs can be manufactured quickly in the. EEE department. Finally you should Design Rule Check (DRC) rules Rules can be modified using All boards are created with the default files. Good quality layouts can still be made under these circumstances, however care There are a number of inter-dependent options the Many PCB manufacturers will have their Otherwise they will The EAGLE default rules are The precise dimensions However one easy This determines clearance between Normally set all equal. This defines minimum track width. It is very important to Net class information is part of the That way changes to the circuit can be It defaults to 50mil which allows a It will need to be reduced. Surface Mount (SMT) packages are used which have metric pad pitch. Obviously a I like: 25mil, 20mil, 12.5mil, 19.685mil (0.5mm). For very dense digital designs For difficult circuits needing a lot of wire After PCB production top layer is replaced by Generally this makes dense routing more Useful for low density single-sided layouts. Note that this solution will not work for all layouts, since non-zero initial Where text is important it can be put on However this requires care. Text will interfere Use DRC to check whether the text will interfere with However routing will. This is correct Radial lead capacitors can be This will prevent the auto-router from routing You can choose how much you do this (e.g. However, to make boards more robust and easier to hand See EE2 lab pages for. So when you assign the same job for different engineers, each one would make it in his own way. But sometimes when working on a complex design some help may be necessary to finish the work. Autodesk EAGLE provides an autorouter feature which may assist you in many cases. However, it is not a completely replacement of manually routing method. It can help you in specific situations to augment your abilities, not replace them. Autorouter completion result could be used as an indicator of your parts placement, if it was 85 or greater this means you did a good job. If not, consider pushing your parts around. Maybe you packed a couple of ICs too close together. Your autorouter can show you where you might need to leave more space between components. You might just find a strategy for your traces that you didn’t see before your autorouter gave it a try. Follow these steps to know how it works: This surely will affect the time it takes to finish. After selecting your settings, press the Continue button. Select the Start button to begin the autorouting process.You can also view the previous tutorial about placing components. For a better experience, we recommend using another browser. Learn more Facebook Join or log in to Facebook. Email or phone Password Forgotten account. Log In Do you want to join Facebook. Sign Up Sign Up Events Events Find more events Find events happening near you that fit your interest. Their software runs under windows, linux, and MacOSX. It's slightly quirky, with a steep (but not too high) learning curve on the front end, but from most reports it is not any more so than other professional CAD packages. They have online support forums that are active from both the company and other users, the package is under current development and gets better with each release. A number of PCB fabricators will accept their CAD files directly. So this is the schematic we have from the Schematic Instructable. Add Tip Ask Question Comment Download Step 2: Menu Commands Used The Board Editor looks a lot like the schematic editor, with some different commands. DELETE Delete an object. Items created in schematics need to be deleted there. SMASH Separate the text labels of a part from the part itself, so they can be moved independently. BREAK Add a corner to a line (or trace.) ROUTE turn an airwire into a trace LINE draw lines (usually in non-copper layers. ROUTE is for drawing copper.) VIA create a hole and pad associated with some signal. (actually, we'll use a text command.) HOLE a hole that isn't associated with a signal, ie for mounting. RATSNEST recomputes airwires and polygons, eg after components have been moved. CHANGE changes an object's properties. RIPUP changes a routed trace back to an airwire. TEXT add text POLYGON create a polygon (actually, we'll use a text command.) AUTOROUTE invoke the autorouter. DRC invoke the Design Rule Check and parameter setting. All the component pads will have to be inside that outline when you move them around, although you can cheat a bit and have traces or board outlines that exceed the board size limit. This has the annoying side-effect that if you pick up a component from it's original localtion, you can't put it back down outside the outline (however, you can use ESC to abort the move, and the component will revert to its original location.) Ok, a few defintions are in order All the signals you created in the schematic are currently AIR WIRES; thin yellow lines that are drawn in the shortest possible way, crossing each other as needed. They stay connected to component pins even when you move the component around. The RATSNEST command recomputes and redraws these after you move things around (and, say, make two connected pins closer together than they used to be.) ROUTING a signal consists of turning an airwire into an actual copper trace on some layer(s) of the board, and positioning that trace so that it doesn't short agains other traces on the same layer of the board. The Freeware version of Eagle only supports a TOP and BOTTOM layer, and as hobbyists we have motivation to try to use only ONE layer. A signal can transition from one layer to another using a via, which is a conducting hole, sorta like a jumper (and we'll use jumpers to implement the top level of the board if we can make the board mostly single-sided.) Creating the PCB design consists of placing all the components in logical places, and routing all the airwires in a way that allows the design to work. A confusing multitude of layers. Most of the drawing commands have a layer-selection pulldown menu that you can use for specifying which layer you want to draw on (exceptions include objects like vias that span multiple layers.) Here are some of the more important layers: Add Tip Ask Question Comment Download Step 5: Move the Components Into the Legal Area The first thing we want to do is move at least some components into the legal board area where we can work with them. If you have a particularly large board with many components, you might want to do this a section at a time. For this sample board, we have plenty of room and we can move them all at once, using the group-move feature. Select the GROUP icon, then click and drag to make a rectangle that goes all the way around the components. Then select the MOVE icon and RIGHT click (right clicking selects the group instead of a single component) and drag the set into the board outline. Use the ZOOM button to tighter the view. Add Tip Ask Question Comment Download Step 6: Shrink the Boad Outline a Bit The full legal side of the board is bigger than we need. Shrink the outline by using the MOVE tool. Click on the center of the top horizontal line (which selects the whole line instead of an endpoint) and move it down, Then click on the center of the rightmost vertical line and move it leftward. Clicking near the center of a line moves the whole line. Clicking near a vertice moves only the point. It doesn't have to be perfect at this point; we're mostly looking for a better view for the next steps. (Oh yeah - click the zoom button to re-zoom the window on the smaller outline.) Add Tip Ask Question Comment Download Step 7: Start Placing the Components Now we need to move the components to (near) where we want them on the final board. OR we want to move them to sensible places that will make the placement of traces easier. In general, you can start by placing the components similar to how they appear on the schematic. (This breaks down when a chip has multiple gates, or the diagram in the schematic symbol has vastly different pinn placement than the actual chip, but it's a good place to start for discreets and simple components. So I swap the transistors because GND is more important to have straight. (IMHO, YMMV, etc.) (This ends up putting the transistors near the supplies that they switch, rather than near the lamps that they switch to, so that still makes sense from a circuit point of view too.) After the rest of the components are placed in ok-looking relative locations, I can squeeze them together again (manually, moving them one at a time; no magic command for this!) and shrink the board outline some more. Add Tip Ask Question Comment Download Step 9: Load Design Rules Since we're hobbyists, we want to make our board with wide traces and big spaces (see ) So we'll load up that set of hobbyist design rules before we start laying out tracks. Click the Design Rule Check icon and use the LOAD button to load hobby.dru from my other instructable. Or you can modify values manually and individually, of course. Or leave them as is. Add Tip Ask Question Comment Download Step 10: Fix Incorrect Package You can see how the design rule change has already modified the board. Pads are bigger, and they're all round. You'll also notice that one of the resistors is set as a non-vertical package, unlike the rest. This was probably an error in the schematic entry, and it didn't matter when all we had was the schematic. Now that we are making the board, we want to change the package as appropriate. Add Tip Ask Question Comment Download Step 11: Try the Autorouter Now we'll see if the autorouter can do some of the work for us.The default parameters will produce a double sided board, and we want to at least TRY to make a single-sided board, so the first thing to do is set the preferred direction for the TOP layer to NA (Not Applicable.)This defaults to the same default grid as the board layout editor in general: 0.05 inches (1.27mm, since I have my editor set up in metric.) Since this particular board has big parts, and we haven't moved any off the default grid, we're ok with that value. IMO, it's better to start with a coarse grid and halve it each time it looks like routes fail because the grid is too large.Or if you've moved the outline too close to the pads, you may have prevented traces from going places they need to go.There's only one trace left.This is a relatively high current trace, and I decided that I won't manually violate the design rules either. Instead, I'll use a jumper wire on the component side, which I can model in EAGLE as a top-side trace.This is shown in the succession of pictures in this step. On multi-layer boards, it's common to have entire layers mostly dedicated to such a power plane. There is an icon on the toolbar for drawing polygons, but it will create polygons associated with a new signal, and I find that when creating a polygon for an existing signal, it's easier to type the text form of the command in the text command area.If this is ALL of the components, there's a ULP that will smash everything (but ULPs are a subject for possible future instructables. Or the EAGLE manuals.)Remember back in the schematic I mentioned that there were a couple of things that had been left out. You should be noticing them about now. POWER connections; there's no way to connect a battery or power supply to this circuit board. Oh sure, you can just tack some wires onto the supply polygons, but how elegant is that. We could go back to the schematic and add some actual power connectors or battery holders, but those are a bit rigid for a circuit that's probably going to be connected to a battery pack with some wires anyway. Instead, let's add some Vias to act as connection points for the power wires. When adding Vias like this, it is convenient to use the text command entry area so we can name the signal at the same time we add the via. The transistors used in the published schematic that we entered apparently come in a sort of metal can package that has dropped in popularity. Add Tip Ask Question Comment Download Step 19: Do Design Rule Check We want to run a design rule check to make sure that none of the manual editing we've done violates the rules. Add Tip Ask Question Comment Download Step 20: Output Using Exported Images Save your work often. You've been doing that, right. Now we're essentially done, and we should figure out how we're going to output our board for admiration on web pages, review by peers, transfer to physical PCB material, and so on. Add Tip Ask Question Comment Download Step 21: Other Useful Menu Icons Here are some other useful commands accessible from the menu icons LAYERS Adjust which layers are displayed. Boards have many more layers than schematics. MIRROR Move a component from being mounted on the top of the board to being mounted on the bottom of the board. CUT COPYS a selection, despite the name. NAME Change the name of an object. CIRCLE Draw a circle. RECTANGLE Draw a rectangle. MARK Place a measurement mark. Your info area will start showing distances relative to the mark as well as to the origin. ROTATE rotate an object. This can rotate angles other than 90 degrees. PASTE Paste some objects that were previously copied with CUT. VALUE Change the value of an object. MITER make signal corners rounded. ARC Draw an arc. Add Tip Ask Question Comment Download Step 22: Useless Commands These are menu icons that I don't find at all useful in creating boards, at least not from schematics (and I feel that you should always make schematics to go with your boards; borh for self-documentation and the error-checking capabilities that are added.) SHOW SHOW is more useful from the text command area. I think. DUPLICATE Duplicate an object.