The bench ruler that measures, sizes screws and tests your wires.
Ruler Dino is a 15 cm workbench ruler shaped like a long-necked dinosaur. Gold ENIG millimetre ticks run along its straight bottom edge; gold land patterns size 0402-1206 passives and SOT-23 parts; drilled holes size M2-M4 screws. A CR2032 in its belly runs an LED tester and a continuity tester: anything that conducts between its gold nose and its gold tail club lights its tail light. The back carries a resistor colour code and an inch scale. There is no MCU.
| Layers | Size | Parts | Nets | Connections routed | Vias | ERC errors | DRC errors / unconnected / parity | BOM @100 |
|---|---|---|---|---|---|---|---|---|
| 2 | 156.1 x 56.0 mm | 9 (+4 pads) | 5 | 10 -> 0 open | 9 | 0 | 0 / 0 / 0 | $0.48 |
Not fabricated, assembled or powered yet. Every number on this page is measured by KiCad 10.0.6 on
the files in this repository (report.json, measured.json) or read
from the live JLC/LCSC catalogue (bom_cost.json).
| Spec, power budget, BOM | SPEC.md |
| Store copy | STORE_COPY.md |
| KiCad 10 project | kicad/ |
| Gerbers, drill, BOM, CPL, STEP, schematic PDF | fab/ |
| Firmware | none: no MCU on this board |
| Renders | front, back, hero, Circuit World thumbnail |
| Brief and generator | design/ |
- Scale: 0-150 mm as one gold comb (1/5/10 mm teeth) 0.6 mm in from the measuring edge; cm numbers in silk; a 1/8" inch scale on the back.
- Gauges: gold 0402, 0603, 0805, 1206 and SOT-23 lands; drilled M2, M2.5, M3 and M4 clearance holes.
- Continuity: VBAT through 220 Ohm and the red tail-light LED to the tail club; the nose is ground.
- LED tester: VBAT through 100 Ohm to a gold + pad; the - pad is ground.
- Power: one CR2032 in a Keystone 3034 holder, used only while pads are bridged.
Purple solder mask, White silkscreen, ENIG copper finish, 1.6 mm FR4, top-side SMT assembly. The gold art is bare copper under a mask opening (ENIG), drawn with its own keep-out so no track runs under it. The QR code on the back opens https://heypcb.ai/world/b/9077794f93d5.
Designed with the HeyPCB method on KiCad 10.0.6, headless, by the heypcb-kicad pipeline: a written
brief composed from reusable circuit blocks, every pin from KiCad's own symbol library, every part bound
to an LCSC number from a dated catalogue read, then ERC, a netlist round trip, locked placement,
Freerouting 2.4.1, pours, silkscreen and board art, DRC with schematic parity, DFM and a fab gate,
each stage gated by a measurement. design/make_brief.py regenerates the brief (outline, part
locks and art) from code.
Part of the heypcb.ai merch collection.
Hardware: CERN-OHL-S v2. KiCad's symbol, footprint and 3D libraries used in the design are CC-BY-SA 4.0 with the KiCad library exception.