{"id":515,"date":"2017-03-10T08:07:16","date_gmt":"2017-03-10T16:07:16","guid":{"rendered":"http:\/\/www.autodesk.com\/products\/eagle\/blog\/?p=515"},"modified":"2023-09-26T15:27:04","modified_gmt":"2023-09-26T22:27:04","slug":"schematic-basics-part-3-erc","status":"publish","type":"post","link":"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/schematic-basics-part-3-erc\/","title":{"rendered":"Schematic Basics Part 3: ERC"},"content":{"rendered":"<h1>Schematic Basics Part 3:<\/h1>\n<h1>Checking Connectivity Errors with an ERC in Autodesk EAGLE<\/h1>\n<p><span style=\"font-weight: 400;\">Greetings and welcome back to Schematic Basics Part 3! If you have been following along on our journey so far, then you know that we are closing in on the end of the road for your schematic journey. There\u2019s one last step before you can check off on your schematic design and move onto your PCB layout &#8211; checking for connectivity with an Electrical Rule Check, or <\/span><b>ERC<\/b><span style=\"font-weight: 400;\">. Let\u2019s do it. <\/span><\/p>\n<h2>What is ERC?<\/h2>\n<p><span style=\"font-weight: 400;\">If this is your first time designing a schematic then the term Electrical Rule Check might be a bit new. This is a handy little tool that you\u2019ll always want to keep in your engineering toolbox, as it helps to point out common errors in your schematic. An ERC will check for the following issues:<\/span><\/p>\n<ul>\n<li>Are all of your nets properly connected and labeled on your schematic?<\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Do you have any conflicting outputs\/inputs on your schematic?<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Are there any open or overlapping pins and ports on your schematic?<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">You can think of an ERC as a second pair of eyes; it will always be there to help you find the missing details that you may have overlooked! Of course, an ERC is not meant to be a replacement for reviewing your schematic manually, so don\u2019t rely on it as your first level of defense.<\/span><\/p>\n<h2>Types of ERC Errors<\/h2>\n<p><span style=\"font-weight: 400;\">When you run an ERC for the first time, you\u2019ll be presented with several error categories, including:<\/span><\/p>\n<p><b>Consistency Errors:\u00a0<img loading=\"lazy\" decoding=\"async\" class=\" wp-image-517 alignnone\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/ConsistencyError.png\" alt=\"consistency-error\" width=\"16\" height=\"16\" \/>\u00a0<\/b><span style=\"font-weight: 400;\">This error means that something isn\u2019t right between your schematic and PCB layout, and your changes likely aren\u2019t in sync between both files. If you get one of these errors, consider it a major red flag to compare both versions of your design before moving ahead.<\/span><\/p>\n<p><b>Errors:\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-518\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/Error.png\" alt=\"error\" width=\"16\" height=\"16\" \/>\u00a0<\/b><span style=\"font-weight: 400;\">Errors are the red stoplights. You need to step on the breaks and check these out before proceeding. Errors can be pretty significant, like having an unconnected pin that will throw your whole circuit out of whack.<\/span><\/p>\n<p><b>Warnings: <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-519\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/Warning.png\" alt=\"warning\" width=\"16\" height=\"16\" \/>\u00a0<\/b><span style=\"font-weight: 400;\">Warnings are the yellow stoplights. While these types of errors might not mess up your design if you move forward without fixing them, it\u2019s good practice to slow down and review them one by one. These guys are minor compared to Errors, and n include many non-design breaking issues like missing net values.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">With those details out of the way, let\u2019s jump into your schematic and get started! <\/span><\/p>\n<p><b>Note<\/b><span style=\"font-weight: 400;\"> &#8211; If this is your first time joining us on our Schematic Basic Series, then welcome! We\u2019re working on a simple LED Flasher that includes a 555 timer and some basic components. Here\u2019s our schematic in its current shape. Go ahead and replicate it on your end so you can follow along with us.<\/span><\/p>\n<div id=\"attachment_520\" style=\"width: 930px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-520\" class=\"size-full wp-image-520\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/led-flasher-schematic.png\" alt=\"led-flasher-schematic\" width=\"920\" height=\"624\" \/><p id=\"caption-attachment-520\" class=\"wp-caption-text\"><em>Our completed schematic of <\/em>an LED<em> Flasher from Schematic Basics Part 2. Make note of the missing net on Pin 5, that\u2019s intentional!<\/em><\/p><\/div>\n<h2>Step 1 &#8211; Running Your First ERC<\/h2>\n<p><span style=\"font-weight: 400;\">Running your very first ERC is super simple and won\u2019t require any existing setup. Follow these steps to get going:<\/span><\/p>\n<ol>\n<li><b><span style=\"font-weight: 400;\">Open your schematic in Autodesk EAGLE.<\/span><\/b><\/li>\n<li><span style=\"font-weight: 400;\">On the left-hand side of your interface, select the <\/span><strong>ERC<\/strong> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-521\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/ERC.png\" alt=\"erc-icon\" width=\"16\" height=\"16\" \/><span style=\"font-weight: 400;\"> icon. You can also select <\/span><strong>Tools \u00bb ERC<\/strong><span style=\"font-weight: 400;\"><strong>,<\/strong> whichever is easier for you.<\/span><\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">This will open the <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\">, as shown below. As you can see there\u2019s a whole lot of warnings and one error to review in our schematic. Before moving forward and fixing these, let\u2019s review how this <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> works.<\/span><\/p>\n<div id=\"attachment_522\" style=\"width: 545px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-522\" class=\"size-full wp-image-522\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/erc-errors-dialog.png\" alt=\"erc-errors-dialog\" width=\"535\" height=\"409\" \/><p id=\"caption-attachment-522\" class=\"wp-caption-text\"><em>The ERC Errors Dialog &#8211; You will rely on this tool heavily in your engineering career.<\/em><\/p><\/div>\n<h3>Showing Errors in Your Schematic<\/h3>\n<p><span style=\"font-weight: 400;\">By selecting one of the listed ERC errors you\u2019ll notice that a black line and box will appear on your schematic, showing the exact location of the error. For example, in our image below when we select the error for an unconnected input pin you\u2019ll notice that it zooms over to Pin 5 on our schematic, which is the pin we intentionally didn\u2019t connect in <\/span><a href=\"http:\/\/www.autodesk.com\/products\/eagle\/blog\/schematic-basics-part-2-nets-and-values\/\"><span style=\"font-weight: 400;\">Schematic Basics Part 2<\/span><\/a><span style=\"font-weight: 400;\">!<\/span><\/p>\n<div id=\"attachment_523\" style=\"width: 1056px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-523\" class=\"size-full wp-image-523\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/input-pin5-error.png\" alt=\"input-pin5-error\" width=\"1046\" height=\"657\" \/><p id=\"caption-attachment-523\" class=\"wp-caption-text\"><em>Selecting an error in the ERC Errors Dialog allows you to easily see where the error is located on your schematic. Note the black line and box around Pin 5.<\/em><\/p><\/div>\n<p><span style=\"font-weight: 400;\">Want to see your errors close up? Select the <\/span><b>Centered<\/b><span style=\"font-weight: 400;\"> checkbox on your <\/span><b>ERC Errors Dialog <\/b><span style=\"font-weight: 400;\">and then select an error. It should zoom in to that specific issue on your schematic showing you the specific problem item. This is handy when your schematics become more complex.<\/span><\/p>\n<h3>Processing Errors<\/h3>\n<p><span style=\"font-weight: 400;\">The three buttons available on the <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> are all related to how you want to process the errors on your schematic. Here\u2019s how they work:<\/span><\/p>\n<ul>\n<li><b>Clear All &#8211; <span style=\"font-weight: 400;\">Selecting this button will remove all of the issues listed on your errors report. Keep in mind that if you select <\/span>Clear All<span style=\"font-weight: 400;\"> and haven\u2019t actually fixed anything, the next time you run your ERC all of the errors will reappear.<\/span><\/b><\/li>\n<li><strong>Processed<\/strong> &#8211; <span style=\"font-weight: 400;\">Selecting this button will gray out the icon of an error that you have selected. This comes in handy if you need a way to visually mark that you have fixed an error before running your ERC again.<\/span><\/li>\n<li><b>Approve &#8211; <\/b><span>Selecting this button will move a selected error into the <\/span><b>Approved <\/b><span>category at the bottom of your ERC Errors Dialog. This is a handy feature if there\u2019s a specific error or warning that you don\u2019t need to fix, and you simply want to remove it from your list of to-do\u2019s.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">One thing to note, just because you mark an error as processed or approved in the <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> does not mean that EAGLE knows it\u2019s fixed. To confirm that an error has been fixed you need to close and reopen the <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> and EAGLE will check your schematic again in full.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ok, that\u2019s enough of an explanation for how the <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> works, let\u2019s start fixing all of the errors in your schematic!<\/span><\/p>\n<h2>Step 2 &#8211; Fixing Your ERC Errors<\/h2>\n<p><span style=\"font-weight: 400;\">Keep in that mind our set of errors might differ slightly from yours. In this part, we\u2019ll go through some of our errors one-by-one to show you how we troubleshoot our way through our schematic, and you can do the same!<\/span><\/p>\n<h3>Error 1 &#8211; Unconnected INPUT pin IC1 CON<\/h3>\n<p><span style=\"font-weight: 400;\">Here\u2019s the first error, but what does it mean? Selecting the error in your <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> should take you to Pin 5 on your NE555 Timer, which is clearly unconnected! Now, before running off to connect that pin to ground, the <\/span><a href=\"http:\/\/www.ti.com\/lit\/ds\/symlink\/ne555.pdf\"><span style=\"font-weight: 400;\">TI NE555 Timer Datasheet<\/span><\/a><span style=\"font-weight: 400;\"> has a hint of what you need, it says:<\/span><\/p>\n<pre>A Decoupling CONTROL voltage to ground with a capacitor can improve operation. This should be evaluated for individual applications.<\/pre>\n<p><span style=\"font-weight: 400;\">Cool, so what that means is that you need to add a capacitor to your schematic before connecting any nets, here\u2019s how:<\/span><\/p>\n<p>&nbsp;<\/p>\n<ol>\n<li><b><span style=\"font-weight: 400;\">Select the <\/span>Add <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-453\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/\/2017\/02\/Add.png\" alt=\"Add-icon\" width=\"16\" height=\"16\" \/>\u00a0<span style=\"font-weight: 400;\">icon on the left-hand side of your interface.<\/span><\/b><\/li>\n<li><span style=\"font-weight: 400;\">In the <\/span><strong>ADD Dialog<\/strong><span style=\"font-weight: 400;\">, search for \u201celectrolytic capacitor.\u201d<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Select the first available capacitor listed in the <\/span><em><span style=\"font-weight: 400;\">rcl &gt; EL &#8211; folder<\/span><\/em><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Select <\/span><strong>OK<\/strong><span style=\"font-weight: 400;\"> and place this capacitor on your schematic between Pin 5 and your ground net.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Next, select the <\/span>Net <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-477\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/02\/Net.png\" alt=\"net-icon\" width=\"16\" height=\"16\" \/>\u00a0<span style=\"font-weight: 400;\">icon on the left-hand side of your interface and connect Pin 5 to the top of the capacitor, then connect the bottom of the capacitor to the ground net below it.<\/span><\/li>\n<li>Last, select the <b>Value <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-487\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/02\/Value.png\" alt=\"value-icon\" width=\"16\" height=\"16\" \/>\u00a0<\/b><span style=\"font-weight: 400;\">icon on the left-hand side of your interface and left-click your newly placed capacitor to give it a value of \u201c10n.\u201d<\/span><\/li>\n<\/ol>\n<div id=\"attachment_525\" style=\"width: 913px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-525\" class=\"size-full wp-image-525\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/led-flasher-c2-capacitor.png\" alt=\"led-flasher-c2-capacitor\" width=\"903\" height=\"618\" \/><p id=\"caption-attachment-525\" class=\"wp-caption-text\"><em>The updated schematic with the newly added C2 capacitor, completing the connection to Pin 5!<\/em><\/p><\/div>\n<p><span style=\"font-weight: 400;\">Ok, that should take care of that error. Close your <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\">, then reopen it and see what happens. Aha! That error is gone, and now we can move on to our warnings.<\/span><\/p>\n<div id=\"attachment_526\" style=\"width: 476px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-526\" class=\"size-full wp-image-526\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/erc-dialog-no-errors.png\" alt=\"erc-dialog-no-errors\" width=\"466\" height=\"391\" \/><p id=\"caption-attachment-526\" class=\"wp-caption-text\"><em>One less error in our life! Adding a second capacitor took care of the unconnected pin 5 issue.<\/em><\/p><\/div>\n<h2>Step 3 &#8211; Fixing Your ERC Warnings<\/h2>\n<p><span style=\"font-weight: 400;\">We won\u2019t go into complete detail on how to fix all of the warnings, simply for the sake of time. But let\u2019s take a look at a few to give you an idea of what they mean and how to fix them. <\/span><\/p>\n<h3>Parts with No Values<\/h3>\n<p><span style=\"font-weight: 400;\">There are several parts in the <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\"> that have no value, including LED1, LED2, and SL1. These should be pretty simple to fix. Here\u2019s how you can take care of LED1:<\/span><\/p>\n<ul>\n<li><b><span style=\"font-weight: 400;\">Select the <\/span>Value <img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-487\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/02\/Value.png\" alt=\"value-icon\" width=\"16\" height=\"16\" \/>\u00a0<span style=\"font-weight: 400;\">icon on the left-hand side of your interface.<\/span><\/b><\/li>\n<li><span style=\"font-weight: 400;\">Left-click on LED1 to open the <\/span>Value Dialog<span style=\"font-weight: 400;\">.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Enter a new value of \u201cRed\u201d and select <\/span>OK<span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">You can repeat this process for LED2, giving it a \u201cRed\u201d value. The SL1 connector will most likely be hooked up to a 9v battery with some clips, so you can give that a value of \u201c9v.\u201d Go ahead and close your <\/span><b>ERC Errors Dialog <\/b><span style=\"font-weight: 400;\">again, then reopen it and you should have three less warnings to worry about!<\/span><\/p>\n<div id=\"attachment_527\" style=\"width: 956px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-527\" class=\"size-full wp-image-527\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/schematic-new-part-values.png\" alt=\"schematic-new-part-values\" width=\"946\" height=\"613\" \/><p id=\"caption-attachment-527\" class=\"wp-caption-text\"><em>Here\u2019s an updated schematic, notice the added part values for LED1, LED2, and SL1. 3 warnings down!<\/em><\/p><\/div>\n<h3>Unconnected Pin<\/h3>\n<p><span style=\"font-weight: 400;\">Here\u2019s an interesting one &#8211; Unconnected pin LED2 C. Now, if you wired up your schematic correctly in <\/span><a href=\"http:\/\/www.autodesk.com\/products\/eagle\/blog\/schematic-basics-part-2-nets-and-values\/\"><span style=\"font-weight: 400;\">Schematic Basics Part 2<\/span><\/a><span style=\"font-weight: 400;\">, then you won\u2019t have this error, but apparently we messed up! <\/span><\/p>\n<p><span style=\"font-weight: 400;\">If we zoom in to the bottom pin of LED2 then we can find the problem. See how the green line is darker next to the bottom of the pin in the image below? That means it\u2019s not connected properly to the LED2 pin and is actually overlapping it. <\/span><\/p>\n<div id=\"attachment_528\" style=\"width: 912px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-528\" class=\"size-full wp-image-528\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/overlapping-pin-led2.png\" alt=\"overlapping-pin-led2\" width=\"902\" height=\"572\" \/><p id=\"caption-attachment-528\" class=\"wp-caption-text\"><em>Check out the overlapping pin that we missed, shown in dark green. We can fix this by deleting the net and adding it again.<\/em><\/p><\/div>\n<p><span style=\"font-weight: 400;\">This is a simple fix, we just need to delete the existing net with the <\/span><b>Delete<\/b><span style=\"font-weight: 400;\"> icon, then rewire it with the <\/span><b>Net<\/b><span style=\"font-weight: 400;\"> icon. And with a quick closing and reopening of our ERC Errors Dialog, the problem is solved.<\/span><\/p>\n<h3>The Last Two Warnings<\/h3>\n<p><span style=\"font-weight: 400;\">The last two warnings are a bit cryptic, so let\u2019s look at the first &#8211; POWER pin IC1 GND connected to N$2. Let\u2019s piece this out:<\/span><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><b>POWER pin IC1 GND. <span style=\"font-weight: 400;\">This is a fancy way of saying Pin 1 on your NE555 Timer. Check out Pin 1 and you\u2019ll see GND to the left of it, which is the ground pin.<\/span><\/b><\/li>\n<li><b>N$2. <\/b><span>Now what in the world is this? That\u2019s actually the name of the net that connects to Pin 1. EAGLE automatically assigns net names unless you change them, and every net will start with N$, then a number. Ours is N$2, but yours might have a different number.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">So, the problem is that there\u2019s a ground pin on this timer that EAGLE is expecting to be connected to a net called GND, but instead it\u2019s called N$2. You can quickly fix this by changing the name of the N$2 net to match the name of Pin 1. To do this:<\/span><\/p>\n<ol>\n<li><b><span style=\"font-weight: 400;\">Select the <\/span>Name <span style=\"font-weight: 400;\">\u00a0icon on the left-hand side of your interface.<\/span><\/b><\/li>\n<li><span style=\"font-weight: 400;\">Left-click the N$2 net to open the <\/span><strong>Name Dialog<\/strong><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Enter the new name \u201cgnd\u201d and select <\/span><strong>OK<\/strong><span style=\"font-weight: 400;\">. <\/span><\/li>\n<\/ol>\n<p><b><\/b><b><\/b><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Go ahead and do the same set of steps for your other issue, which should be a naming problem with your power net and Pin 8 (VCC+) on your NE555 timer. After that, close and reopen your <\/span><b>ERC Errors Dialog<\/b><span style=\"font-weight: 400;\">, and you should be error free.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">P.S. Struggling to find the right net on your schematic? Select the <\/span><b>Show\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-529\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/Show.png\" alt=\"show-icon\" width=\"16\" height=\"16\" \/> <\/b><span style=\"font-weight: 400;\"> icon and<\/span><b> left-click<\/b><span style=\"font-weight: 400;\"> on any net on your schematic. You\u2019ll see the name of the net displayed in the lower left corner of your interface as shown below.<\/span><\/p>\n<div id=\"attachment_530\" style=\"width: 854px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-530\" class=\"size-full wp-image-530\" src=\"https:\/\/www.autodesk.com\/products\/fusion-360\/blog\/wp-content\/uploads\/eagle\/2017\/03\/show-net-name.png\" alt=\"show-net-name\" width=\"844\" height=\"316\" \/><p id=\"caption-attachment-530\" class=\"wp-caption-text\"><em>An easy way to figure out the name of a net with help from the Show action.<\/em><\/p><\/div>\n<h2>Error Free Is the Way to Be!<\/h2>\n<p><span style=\"font-weight: 400;\">Well, it\u2019s official, your schematic is now error free and complete! Give yourself a round of applause, this was quite the journey. If you ever get stuck on connecting pins in an integrated circuit like our NE555 timer, then be sure to look up a datasheet to get some guidance. With your schematic done, it\u2019s now time to transform your idea into a physical PCB layout! This is where things really start to come alive. Be on the lookout soon for our PCB Layout Basics series, coming soon!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Making your first schematic in the free version of Autodesk EAGLE is just the tip of the iceberg! Get the full experience today and <\/span><a href=\"http:\/\/www.autodesk.com\/products\/eagle\/subscribe\"><span style=\"font-weight: 400;\">Subscribe to Autodesk EAGLE<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Until we meet again in the PCB layout, keep designing!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The finish line has never been so close! Read on to learn what needs to be done to give your schematic the final stamp of approval. <\/p>\n","protected":false},"author":2425,"featured_media":440,"menu_order":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[434],"tags":[],"coauthors":[],"class_list":["post-515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eagle","dhig-theme--light"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Schematic Basics Part 3: ERC | EAGLE | Blog<\/title>\n<meta name=\"description\" content=\"Learn how to check for connectivity in your Autodesk EAGLE schematic with an Electrical Rule Check (ERC).\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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