Run a DRC check to ensure no schematic errors. Then, import changes to the PCB editor. Keep microcontroller placement and delete other parts. Unlock layers and remove old enclosure models. Proceed with updated schematic content.

Change default track width from 6 mil to 8 mil. Set grid to 100 mil. Place mounting holes using exact coordinates. Draw board outline with rounded corners. Lock mounting holes and microcontroller. Move all components to the bottom layer.

Place LEDs for 4-digit 7-segment display and dot indicators. Maintain order for firmware compatibility. Place decoupling capacitors near each LED’s power pin, using visual aids like net color coding and component filters.

Place buttons, buzzer, light sensor, RTC, voltage regulator, headers, and level translators. Hide designators where distracting. Use logical grouping and layout for easier routing.

Start layout using standard rules. Place vias and draw signal and power tracks. Use 8 mil for digital, 20 mil for power. Follow trace width and spacing recommendations. Place ground vias first to avoid rerouting. For special signals like USB, use differential pair rules.

Add copper regions for LED power and 3.3V. Use appropriate priorities in Copper Manager. Draw ground polygons on bottom and inner layers. Add stitching vias where signals change layers to ensure proper return paths.

Place your logo on the bottom solder mask layer for a gold effect. Add copper under the logo and connect to ground. Add readable silkscreen text for button labels, versioning, project name, and a reference to your website (optional).