Multi-Layer PCB Design
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All OAP Printed Circuit Board layouts are two-layer designs.
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All components are installed on the top layer.
Step 1 - Refactoring OAP Circuit Designs
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Additional attribution has been added to Dafydd's OAP 0.1
![[WWW]](/wiki/rightsidebar/img/moin-www.png)
gschem circuit design schematics to enable the gsch2pcb tool to automatically create the initial PCB layout and network data files.
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Three attributes must be specified for each symbol on the schematic:
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footprint
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value
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refdes.
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see Plans >> PCB Schematics for details.
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| Figure 1 - gEDA gschem with OAP Motor Control Module | |
Step 2 - PCB Design
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The OAP PCB designs were created using Harry Eaton's free
pcb software for Linux.
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PCB is an interactive printed circuit board editor for the X11 window system.
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PCB has many features and is capable of professional-quality output.
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PCB includes a rats nest feature, design rule checking, and can provide industry standard RS-274-X (Gerber), NC drill, and centroid data (X-Y data) output for use in the board fabrication and assembly process.
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PCB offers high end features such as an autorouter and trace optimizer which can tremendously reduce layout time.
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In Figure 2, the top side solder is shown in orange and the bottom side solder is shown in gray.
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Custom PCB elements were created for various OAP components such as the Omron G2R-14 and LY2-0 relays.
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| Figure 2 - OAP Motor Control Module PCB Design | |
Step 3 - Perform Design Check
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The OAP PCB designs are exported as Gerber RS-274X format files.
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The RS-274X files are submitted to
FreeDFM, a free online PCB design check available from Advanced Circuits in Colorado, USA.
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Errors and warnings are corrected.
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| Figure 3 - OAP Motor Control Module Gerber Viewer | |
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| Figure 4 - Design Check Output for OAP PCBs | |
Step 4 - Build / Review Cycle
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PCB design is submitted for prototype manufacturing to
Advanced Circuits.
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PCB prototype is used to create a working OAP module.
Next Steps
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PCB designs are refined and updated as problems are reported or detected.
CategoryPlans