A reference board from board_search. With focus=IC it returns that IC's pin-by-pin neighborhood (decoupling, pull-ups, connected parts) and, when 2+ boards use the IC, how the others wire it. Reply: focus_match_type says exact, partial or ref matching; consensus compares wiring across consensus.board_count boards; passives_omitted counts hidden plain passives. Components and a focused IC carry the design files' own part numbers where listed (mpn, manufacturer, lcsc, mouser, digikey): look them up with jlc_get_part or mouser_get_part. An unknown slug's error adds did_you_mean (boards sharing most of its words).

Search ~300 open-source reference board schematics to see how real designs use an IC: its passives, decoupling, pull-ups and power topology. Not for buying parts (jlc_search) or choosing sensors (sensor_recommend). Then call board_get(slug, focus=IC) for that IC's pin-by-pin neighborhood.

Use component= for an IC name (searches the BOMs; when 2+ boards match it adds a cross-board consensus), query= for a function ("motor driver", "USB power delivery"), tag= to browse. Tags ignore case/whitespace; usb-c means usb. Unknown tags return valid_values from the catalog. Combine them to narrow. Results are sorted by relevance, then component count; matched_by says why each appeared (key IC, component, text, tag). A component consensus counts distinct boards per pin choice (pct divides by consensus.board_count); browsing by tag alone adds tag_consensus, the ICs boards in that category commonly use. An empty reply's hint names the words no board matches and what leaving them out finds.

Download a part's KiCad symbol (.kicad_sym) and footprint (.kicad_mod) as text from SamacSys ComponentSearchEngine; works for any manufacturer. Slow (a search of about 15 s, then a download; files are kept): only when you need the KiCad files. For EasyEDA footprints use jlc_get_part.

Check whether KiCad, Eagle or Altium symbols, footprints and 3D models exist for a part on SamacSys ComponentSearchEngine, with its datasheet. Slow (a search takes about 15 s, longer when ComponentSearchEngine is busy; answers are kept): only when you need ECAD models. For part search use jlc_search; for EasyEDA footprints, jlc_get_part.

DigiKey price, stock and datasheet for one part. Use only when the user wants DigiKey data; find parts with jlc_search first. Shared daily limit, one part per call: don't check whole BOMs. Don't retry a quota error. Reply: part_number, price, price_breaks and min_qty are one packaging's (the DigiKey PN given, else the smallest order, usually cut tape; packaging names it); other_packaging lists the rest (reel, Digi-Reel) with their PN, min_qty and price. lifecycle is DigiKey's product status.

Curated PCB design rules for power, protection, interfaces, MCUs, layout and EMC. An empty topic lists every rule file. note says the files were found by their text, not their name or keywords.

Find catalog-checked alternatives, ranked no-fee first (same-package passives/crystals first within each tier). Reply: summary.found counts verified alternatives; unverified_alternatives need manual comparison for missing required matches or incomparable rating conditions (inductor Isat, DCR, thermal current; multi-diode loading); specs_unparseable lists specs not verified; unchecked_requirements includes pinout/circuit checks still needed; has_easyeda_footprint=null means unknown. Reviewed spec_evidence cites manufacturer values/conditions; spec_discrepancies preserves catalog conflicts. no_datasheet and no_datasheet_note refer only to JLCPCB availability. RF parts (splitters, baluns, couplers, amplifiers, filters, transceivers) have no rules, so they come back as similar_parts from every maker, ordered by how much of the original's frequency range each covers (frequency_coverage: full, partial with share, or unknown); parts that don't overlap it are left out and counted in summary.frequency_check. Other part types without rules (modules, load switches, addressable LEDs) list parts in the original's package and part family first, with likely_drop_in (pinout unchecked), then other makers' parts in the same package. library_type="no_fee" with no basic/preferred match names the best extended ones in summary.extended_examples. Listed parts carry has_easyeda_footprint where it's already known (no extra request), and pcba_type ("economic" or "standard_only"). Lifecycle (NRND) isn't checked: mouser_get_part or digikey_get_part has it. Stock comes from the live search or the daily catalog snapshot. Each part's data_source identifies that observation. Savings use a rounded $3 Economic loading-fee estimate (is_estimate and assembly_service_assumption), not a current quote; Standard service differs.

Full details for one JLCPCB part (all price tiers, datasheet, specs, EasyEDA footprint availability), or the JLCPCB parts matching a manufacturer part number.

Reply: stock and prices are live, held up to an hour; prices lists quantity tiers; datasheet is LCSC's datasheet page (a viewer, null when LCSC has none) and datasheet_pdf the datasheet itself: a short link on this server that redirects to the PDF and stays valid (LCSC's own link when the PDF is LCSC's); maker_datasheet is the manufacturer's own datasheet link where JLCPCB lists one (most TI parts), and datasheet_note says when there is no PDF, or that datasheet_pdf is LCSC's copy when JLCPCB has none (specs come from LCSC too when JLCPCB lists none); specs_note says when LCSC lists no specs, or what the listing leaves out for the part type (Isat's definition, MLCC DC-bias loss, an RF cable's end styles, a MOSFET's RDS(on)/Vgs(th) mixing typical and maximum figures, multi-diode loading conditions); spec_evidence cites reviewed manufacturer values and conditions, document identity, printed page and source URL; spec_discrepancies flags catalog/document conflicts without replacing catalog specs. no_datasheet/no_datasheet_note refer only to JLCPCB availability; lcsc_url is the LCSC product page; pcba_type is "economic" or "standard_only" (JLCPCB's PCBA Type: one standard_only part moves the whole order to Standard assembly). No lifecycle status (NRND, obsolete): JLCPCB doesn't list it; mouser_get_part and digikey_get_part return lifecycle (Mouser's is null where it states none). jlc_get_pinout(lcsc, footprint=true) gives the footprint's pads. has_easyeda_footprint=null means unknown, false means absent; MPN lookups return results and total. Non-exact replies add match (separators, packing, alias, alternative, lcsc or related), matched_mpn where applicable, and a note naming the part types for related full-text results (and parts another manufacturer numbered after the original). An LCSC code given as mpn finds that part (match=lcsc); BOM placeholders such as N/A or DNP find nothing. MPN lookups search the daily catalog snapshot (stock >= 10), most stock first. Rows carry data_source (kind/provider/observed_at); cached live observations retain their timestamp. MPN misses describe snapshot scope, availability outside it is unknown, and next_call offers an explicit jlc_stock_check with min_stock=0 without executing it.

Pin numbers and names from a part's EasyEDA symbol, exactly as EasyEDA has them (e.g., VCC, GND, PA0); with footprint=true also the EasyEDA footprint's pads. A pin's number is as the symbol shows it and matches the footprint pad ("1", "A2"); electrical (input, output, bidirectional, power) appears only where the symbol's creator set it, so its absence says nothing. unverified ("Symbol not verified by LCSC") appears when LCSC hasn't verified the symbol; note means every pin's name is its number, so the symbol doesn't say what the pins do, or that a polarized two-pin part's numbers may not match its datasheet's (connect it by pin name). footprint_error says why a requested footprint is missing.

Search in-stock JLCPCB parts locally with natural-language parsing and spec filters. Stock and price (the 1-piece price) are from the daily catalog snapshot, scraped at data_as_of; jlc_get_part and jlc_stock_check are live. Default 20 results; strict=true disables relaxation. Reply: filters_applied lists every filter that ran, given or read from the query; parsed shows only what the query text gave. relaxed names query words, a query-only library preference or part type left out; ignored_filters explains unapplied/rare filters, parsed.adjusted_filters explains moved/omitted specs; unlisted counts, per range filter, parts it left out only because they don't list that attribute ("-"); counts_complete=false means partial counts; valid_values lists accepted inputs on errors. When the search shortens a full part number (LM1117-3.3 searches LM1117), parts matching it come first: mpn_match is full, same_suffix or family, and mpn_matches counts each. A full package (QFN-24-EP(4x4)) keeps its body size and exposed pad; a bare family (QFN-24) matches any body, and parsed.adjusted_filters says so. In results, pcba_type "standard_only" means one such part moves the whole order to Standard assembly (higher setup and stencil fees), and no_datasheet=true that JLCPCB lists no datasheet (find it on the maker's site, or pick another). total counts every match before limit and offset; library_type_counts use the same constraints. Spec sorts add sort_value (the figure sorted on, as listed, with its test condition, or null) and sort (what was compared, at which condition, and how far the order compares like with like). An empty reply's hint suggests a next step. why_empty adds bounded local library/package/stock checks with counts, next calls and diagnostics_complete; original results stay empty. Negative Vout preserves polarity, impedance@frequency compares that condition, and part-number exclusions are reported as unsupported. Part rows carry data_source (snapshot/provider/observation time); no diagnostic makes live requests.

List categories, a category's subcategories, or a subcategory's filterable attributes (with type and example values) for jlc_search spec_filters. No args lists all categories.

Live JLCPCB stock and price search. Use jlc_search first (faster, parametric filters); use this only to confirm stock before ordering, find parts with stock under 10 or out of stock, or page through large result sets. JLCPCB matches whole part numbers and their starts, not text inside them: when no result contains a part-number fragment ("2812"), hint names in-stock parts that do (WS2812B). Use jlc_get_part(lcsc=...) for full details.

Mouser price, stock and datasheet for specific parts. Use only when the user wants Mouser data; find parts with jlc_search first. Shared daily limit: batch up to 10 parts per call (one request). Don't retry a quota error. Reply: lifecycle is Mouser's status where it states one (Not Recommended for New Designs, End of Life, Obsolete, Discontinued), else null: Mouser states none for most parts, including some the maker marks NRND (AP2553W6-7). digikey_get_part's lifecycle is DigiKey's product status (it listed AP2553W6-7 as NRND); the maker's site decides. not_found lists the given numbers no result matches (Mouser skips them without saying). A number can match another maker's part (Mouser's SRV05-4 is onsemi's): check manufacturer.

Recommend sensor ICs and modules for what you want to measure, with protocol and platform support. Filter choices come from the catalog; unknown values list valid choices. Accepts 1-wire/one-wire and heart rate/blood oxygen aliases. Not for buying parts: use jlc_search. Results are sorted by how many platforms have drivers for the sensor. CCS811 exposes estimated eco2 and VOC output; humidity/temperature are compensation inputs, with cited operating/stress voltage evidence. Generic MCU/platform IDs such as RP2040 are excluded.