IN is the host-side half of a custom nine-conductor extension. It accepts a keyed 2 × 5, 1.27 mm Gadgeteer cable and presents a male DE-9 interface for a dedicated cable to OUT. IN and OUT name the power path, not signal direction. Use one host and one OUT; the assembly is not an RS-232 interface, level converter, isolator, or general-purpose D-sub extension. It must never be connected to a computer serial port.
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: Enabled native0;header-only purchasing BOM/blank native MPNs,partial STEP,five ignored categories/physical open.
The nine DE-9 contacts carry exactly seven independent signals, one ground, and one fused +5 V conductor. Gadgeteer pin 1, the host +3.3 V rail, does not enter the DE-9 or OUT board. Gadgeteer pin 2 supplies +5 V through IN’s F1 fuse; pin 10 is the sole signal/power return. The DE-9 shell is not a tenth conductor and has no intentional connection to circuit ground.
| DE-9 numbered contact | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|
| Gadgeteer pin | 3 | 4 | 5 | 6 | 10 | 7 | 8 | 9 | 2 |
| IN net | SIG3 | SIG4 | SIG5 | SIG6 | GND | SIG7 | SIG8 | SIG9 | CABLE_5V |
The OUT board uses this same numbered map. Confirm numbers from each actual mating face; male, female, and PCB solder views are mirrored. Only a tested nine-conductor straight-through cable is allowed: IN male mates a cable socket, OUT female mates its cable pins, with contact n wired to n for all nine. Maximum cable length is 1.0 m, with +5 V and ground conductors at least 26 AWG. Before first power, prove every intended contact is continuous below 0.5 Ω after test-lead compensation and all unintended contact/contact and contact/shell combinations are above 1 MΩ. Measure loaded voltage drop too. No null-modem, crossover, unidentified commercial serial cable, or hot plug.
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.
Complete current review: actualv12 retains passive interface/fuse/shunts,no successor. Contract covers12 purchased/four testpad refs; purchasing BOMs are header-only and native BOM lacks MPNs. Enabled native checks0 do not close five ignored categories/partial STEP/physical gates.
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.
The following are requirements for the next design iterations; this page does not claim they are already fitted:
Documentation route: smoothieware.org/extensions/d-sub-to-gadgeteer-in.
The 2026-10-11 upgrade program has saved additional candidates v13, v14, v15. 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.
The three additional revisions are v13, v14, v15. 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.
7a72ed48cbca355e6bc8af0c96eb76fb9f7de3b17b1e5dce11204d4df78bf25e.PinHeader_1x04_P2.54mm_Vertical. Fit only the selected population; check its pin map and voltage in the design record.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.
Protected source v20; current PCB SHA-256 645c020ac2b62be9a0653f16f9d5aaa4edf8a3726437a61c551a5e04eeb9b44a. Fresh native checks: zero enabled errors, opens, schematic mismatches and ERC findings; 1 PCB warnings remain. Electrical geometry/project rules unchanged; 189 historical files, 88 model entries,17 exports and12 current population images verified. All12 populated/bare views inspected. Full documentation URL is readable in the current renders. Physical qualification remains open; no price or area savings claimed.
Engineering revision v24 removes36 redundant trusted-input protection parts and restores the original23 ×29mm outline. A horizontal2.54mm alternative header and undersideSH connector share the compact bottom area. Native checks find no errors or open connections; each connector population has six renders with the fullDB9 shell framed. This remains an unqualified engineering design, not a fabrication release.