Gadgeteer perma-proto breadboard

Solderable breadboard-style prototyping board with thirty 2.54 mm columns, split five-hole groups and four horizontal power rails, plus Gadgeteer access. It is a soldered prototyping substrate, not a solderless breadboard.

Development status

Baseline documentation snapshot: 2026-10-11, before the requested connector/protection/usability revision program. New revision features require their own reviewed source and qualification evidence.

This page documents an unqualified engineering study, not a released or tested product. Saved CAD, renders and automated checks do not establish a safe assembly, compatible cable, firmware support or a usable current rating.

Board-specific qualification limits: Independent review remains pending; S010 inlet fuse/reverse protection, S011 inlet TVS and S052 GPIO ESD clamps absent; physical host/cable/DIP assembly and fabrication release open.

Interfaces and wiring

The exact connector orientation, pin mapping and supply ownership must be taken from the selected revision’s schematic and connection specification. Do not infer wiring from the connector shape.

Power off before connecting or changing jumpers. Verify pin 1, signal direction, supply voltage and ground at both ends of every cable. A mechanically fitting connector is not proof of electrical compatibility. If a host pin mapping or current allocation remains unresolved in the design record, do not connect the board until it is resolved.

Selected component architecture

See current review. Retain passive solderable strips/rails; no exact stocked connector match or justified IC addition. Preserve v11; no new version. Current selected v11; retained native/stock/physical qualification limits remain explicit.

Configuration and commissioning

Use the configuration and firmware contract for the exact selected revision. Do not copy another module’s socket assignments or assume that an unused pin is available. First-article work must verify source selection, reset/unplug behavior, cable orientation and the actual load or sensor interface before normal operation.

Requested connector and usability upgrades

The following are requirements for the next design iterations; this page does not claim they are already fitted:

  • On electrically suitable three/four-pin low-voltage ports, provide compact alternative 2.54 mm header/Molex-style and keyed STEMMA-family footprints. Populate one connector option per shared position and document its pin order. Use STEMMA QT only for compatible four-wire I²C; connector appearance does not make another signal protocol I²C-compatible.
  • Render each supported connector population separately. Document clearances, cable access and the exact fitted option.
  • Use uppercase titles in a consistent Montserrat-style face, labels on both sides, visible domain boundaries, a revision-specific wiring guide and this page’s URL on the silk where readable.
  • Keep mounting-hole centers on a documented 10 mm lattice; add cable-tie holes where space and electrical clearances permit. Place status LEDs near accessible edges and give every indicator its own disable solder jumper. Provide labeled test pads and a ground observation point.
  • Review applicable DC power entries for reverse-polarity cutoff with a blinking warning, overvoltage cutoff/indication, controlled startup and electronic overcurrent protection. Indicator and protection circuits must work in the fault state without defeating isolation or safe output defaults. Thermal protection belongs only where the power/thermal analysis justifies it.
  • Electronic protection does not automatically replace a required mains/branch safety fuse. Backfeed blocking and inductive-load flyback clamps are separate design functions. Do not add identity EEPROMs, fault memory, calibration storage or paid self-test hardware under this upgrade program.

Design sources

Documentation route: smoothieware.org/extensions/perma-proto-gadgeteer.

Additive design studies

The 2026-10-11 upgrade program has saved additional candidates v12, v13, v14. These studies preserve the historical design described above. Their connector, LED, mechanical and protection changes are revision-specific and remain unqualified.

See the per-board changes, failures and remaining work and mandatory family specification. Use the source hash and native check for the exact candidate being reviewed; do not infer hardware ratings from a rendered population.

Upgrade candidate readback

The three additional revisions are v12, v13, v14. They are engineering studies; saved CAD and renders do not release the hardware. The latest candidate is described below. Older baseline notes above remain historical.

perma-proto-gadgeteer

  • Latest PCB source, SHA-256 afc5f52c7b79c07806686a8a627b30953304d30e190b0f472ffa93b2d58d3675.
  • Last native check: 0 errors, including 0 open connections. This is a CAD result, not electrical, assembly or firmware qualification.
  • No alternative connector population is recorded for this physical role. Any applicable connector conversion remains an explicit design-review item.
  • normal population/render record: 6 images; source current; image hashes match; 0 unresolved models.
  • Changes, failed trials and remaining work.

Applicable protection, current-path, thermal, pinout, cable access and physical tests remain open wherever the linked board record has not verified them. A zero native-error count does not close those gates.

Second-round annotation readback v15 — 2026-10-13

Protected source v14; current PCB SHA-256 f0a5a35ef2a6c7139b99ec6c0e3edc23f33dbd0b14519040985f8e5fc87bbf9b. Fresh checks: zero enabled PCB errors/opens/parity and ERC errors; 2 PCB warnings. Electrical geometry, project rules and 91 historical files unchanged. Verified 1 model entries, 17 exports and 6 current population views, all inspected. Full documentation URL readable. Inherited native warnings and enabled-rule exclusions remain explicit Physical/thermal/current/connector-fit qualification open No priced or area savings established by annotation candidate.

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