Eagle (Autodesk)
By Autodesk
Eagle is a printed circuit board (PCB) design and schematic capture application owned by Autodesk, used by electronics engineers and hobbyists to draw circuit schematics, lay out multi-layer boards, and generate manufacturing files. It…
Definition
Eagle is a printed circuit board (PCB) design and schematic capture application owned by Autodesk, used by electronics engineers and hobbyists to draw circuit schematics, lay out multi-layer boards, and generate manufacturing files. It combines a schematic editor, a board layout editor, and an autorouter in a single package, and is widely used for prototyping consumer electronics, embedded systems, and hobbyist projects such as those built around Arduino-style boards.
Overview
Eagle (a name originally standing for Easily Applicable Graphical Layout Editor) is PCB design software that lets an engineer capture a circuit as a schematic and then translate that schematic into a physical board layout with copper traces, vias, and component footprints. It has long been popular in the maker and small-hardware-company community because of its relatively low cost compared to enterprise electronic design automation (EDA) tools and its large library of community-shared component footprints. Mechanically, Eagle enforces a link between the schematic and the board: each component placed on the schematic corresponds to a footprint on the board, and nets defined by wires in the schematic become ratsnest lines that the layout editor uses to guide trace routing. Designers route traces manually or invoke the built-in autorouter, then run design rule checks (DRC) that flag clearance, trace-width, and other manufacturability violations before files are exported as Gerber data for fabrication. Autodesk acquired Eagle in 2016 and has since integrated it with Fusion 360, allowing mechanical enclosure design and electronic layout to be developed together. Within the PCB design landscape, Eagle sits below high-end tools such as Cadence Allegro or Siemens Xpedition, which target complex multi-board systems and advanced signal integrity analysis, and it competes more directly with KiCad, an open-source alternative, and with EasyEDA, a browser-based tool aimed at quick-turn hobbyist boards. Eagle's appeal has traditionally been its balance of a mature feature set with a gentler learning curve than full enterprise suites, though its interface and licensing model have felt dated to some users as free and open-source alternatives matured. In practice, Eagle is used to design two- to eight-layer boards for products ranging from hobbyist Arduino shields to small commercial electronics, with designers exporting bill-of-materials and Gerber files directly to PCB fabrication houses. Its extensive library ecosystem, built up over decades of community contributions, remains one of its practical advantages, since designers can often find existing footprints for common components rather than drawing them from scratch. Limitations include weaker support for very high-layer-count or high-speed digital designs compared to top-tier EDA tools, and a subscription pricing model since the Autodesk acquisition that some long-time users found less favorable than the original perpetual licenses. Teams working on simple to moderately complex boards, especially in maker and startup contexts, often find Eagle sufficient, while teams doing dense high-speed digital or RF work typically move to more specialized tools with deeper signal integrity and analysis capabilities.
Key Features
- Linked schematic capture and PCB layout editors sharing a single design
- Built-in autorouter for automatic trace placement across layers
- Design rule checking to catch clearance and manufacturability issues
- Large community library of component footprints and symbols
- Gerber and drill file export for direct submission to fabrication houses
- Integration with Autodesk Fusion 360 for combined mechanical and electrical design
- Support for multi-layer board designs up to moderate complexity
- Scripting language (ULP) for automating repetitive design tasks