OLED hairpin A1

This is the larger-screen, replaceable-CR2032 prototype revision. Open oled-hairpin-A1.kicad_pro in KiCad 10. The board is 78 × 25.5 × 0.8 mm; the OLED and USB-C connector are on the front, while the CR2032 retainer, MCU, and support parts are on the back. USB-C is for programming and external power; it does not charge the cell.

Files

• oled-hairpin-A1.kicad_sch and .kicad_pcb: editable native schematic and routed layout
• OLED_Hairpin_A1.kicad_sym, .pretty/, sym-lib-table, fp-lib-table, 3dmodels/: project-local symbols, footprints, and approximate display/battery models
• design-record.md: circuit, choices, checks, remaining fit and power measurements
• bom-grouped.csv: purchasing-oriented part list
• oled-hairpin-A1-schematic.pdf: schematic preview
• concept.png, front-copper.png, back-copper.png: quick visual previews
• erc.rpt, drc-routed.rpt, parity.txt: verification evidence
• oled-hairpin-A1.glb: Boardrepo-style viewer model with static “Hello ♥” artwork

This is an electrically routed prototype draft, not a fabrication release. The OLED flex fit, CR2032 runtime, battery cover, and clip attachment require prototype measurements. No firmware is included. Read design-record.md before ordering.