PCB Design Checklist
PCB Design Checklist for less errors
Preplanning
- Start with a Simple requirements documents , a simple excel sheet will do ( google sheets with tiny url )
- It should cover basic functional requirements ( these can later on be assessed with Verification and Testing )
- Unless needed avoid expensive and unkown parts .
- Confirm input supply , total power requiremenst , Layout for I/O and dimensions.
Schmeatic Design
- All new parts to be double checked for pinout
- Create schematic in a frame with different sections broken out , if too big break in pages.
- Component rating to be 1.5 the required ratings
- Check active compoents for min and max voltages
- Make sure engough capacitance is there on output of LDO / Buck
- Do not forget decoupling caps
PCB Design
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Make sure to have Date and Name for the project
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Placement of components is 80% job done so most important
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Place in a fixed grid , maing maching placement easy
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Minimum 3 fiducials
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Use JLC 4 layer as default setup
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Are there any Current Resisor ( Make Sure size is correct ) and sections are isolated
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Power traces please calculate accordingly
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Unless going into a Enclosures , make sure to have mounting holes
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Touchpad for all voltages ( small pads will do )
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Use SMT unless no other options
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Does anything themal management
- heatsink if Themal dissapation is high ( space for heatsink )
- Bottom vias hemal pad is there / large via
- If a pad has to transfer heat avoid themral erliedf around
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High speed / Differential lines need impedance matching
- avoid vias on these lines
- provide solid plances under them
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Cannot fulfill current in trace then remove solder mask for solder to increase current.
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Avoid right turns and try to group similar signals
Design tools
Verification and Testing
Prototypes
- Go step by step ,