Design Notes
This page demonstrates Hextra shortcodes available in any content page — useful for assembly guides, design notes, and project documentation.
Callouts
Assembly Steps
Order PCBs
Upload Gerber files to your preferred fabricator. Recommended: 1.6mm FR4, HASL finish, green solder mask.
Solder SMD components
Start with the smallest components (0402 passives), then ICs. Use solder paste and hot air or reflow oven.
Solder through-hole connectors
Install pin headers last — they’re tallest and would block access to SMD pads.
Test
Power up with current-limited supply. Check 3.3V and 5V rails before connecting to Arduino.
Tabs (Variant Comparison)
2-layer stackup — suitable for simple shields with low-speed signals.
| Layer | Usage |
|---|---|
| Top | Signal + components |
| Bottom | Ground plane |
Cost: ~$5 for 5 boards (JLCPCB)
Details (Collapsible)
Connector Placement
The Arduino Uno shield template places all pin headers along the board edges to match the standard Arduino form factor:
| Connector | Pins | Function |
|---|---|---|
| J1 | 1×8 | Digital I/O 0–7 |
| J2 | 1×6 | Analog inputs A0–A5 |
| J3 | 1×10 | Digital I/O 8–13 + GND/AREF |
Mounting Holes
Four M3.2 mounting holes match the Arduino Uno board-to-board spacing. Use 11mm standoffs for proper clearance.