Provide fail-safe 5 V PWM/TTL control and individually diagnosable normally-closed protection inputs for a specified CO2 laser power supply.
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: v17/78purchased/38blank MPNs;35selected/529later hashes match;threeopens/five ignorecats/clamp/thermal/host/physical open.
The following is the repository-canonical 10-pin mapping for the selected/candidate socket arrangement. Pin 1 is +3.3 V, pin 2 is +5 V, and pin 10 is GND. Current V2 Prime documentation describes a different physical rail placement; do not create footprints, cables, or copper until the real target hardware is inspected and this discrepancy is closed.
| Pin | Function |
|---|---|
| 1 | +3.3 V logic |
| 2 | +5 V output logic |
| 3 | Global/interlock status |
| 4 | TTL command |
| 5 | Protect diagnostic 1 |
| 6 | Protect diagnostic 2 or enable |
| 7 | PWM command |
| 8 | Protect diagnostic 3 |
| 9 | Protect diagnostic 4 |
| 10 | GND |
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.
The following are specification requirements or study assumptions; they are not measured operating ratings. A newer selected-revision note takes precedence over historical draft options.
The design describes the following protection intent. Check the selected schematic and remaining qualification gates before relying on it:
Per-input high-voltage divider/current limit/clamp, ESD/surge components, Schmitt behavior, hardware fail-safe pull states and output current limiting.
Retained v17 review covers99records/78 purchased refs;existing high-power fault resistors,ten V1 stock classes and V2 DCK retained,no successor. Threeopens/38blank MPNs/five ignored categories and clamp/fault/thermal/host/physical gates remain.
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/laser-psu-adapter-board.
The 2026-10-11 upgrade program has saved additional candidates v18, v19, v20. 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 v18, v19, v20. 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.
3f5e68adabc2a67917d24082376c24f8ab7f9e1ecdcecce8c8321463a91d0cd2.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 v24; current PCB SHA-256 395c7962f581ff027e882851b8622f48f01aa6a7ee888ba1434fff35b3ace518. Fresh checks: zero enabled PCB errors/opens/parity and ERC errors; 29 PCB warnings. Electrical geometry, project rules and 56 historical files unchanged. Verified 78 model entries, 19 exports and 6 current population views, all inspected. Full documentation URL readable. Laser interface only, not a certified safety device; interlock and laser/PSU restrictions preserved 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.