PCB trace width calculator by current (Excel)
Excel calculator for PCB trace width by current, temperature rise, copper thickness, external or internal layer per IPC-2221. Includes a quick lookup table, free.
3 templates
Pre-fabrication PCB checklist (Excel)
19 checks before sending Gerber files to fabrication: files, outline, traces, drill holes, solder mask, DRC, assembly. Mark Pass / Fail, auto-counted.
Sample BOM for an ESP32 4-relay control board (Excel)
Sample BOM for an ESP32 4-relay control board: designators, values, packages, quantities per order, and a unit price column to fill in. Free download.
All templates are created by OctaX.one and released under the CC BY 4.0 license: free to use, including for commercial purposes, as long as you credit “OctaX.one”. Proposed licensing policy to be finalized before launch.