Costs

Parts cost per unit

Every electronic line of the bill of materials is listed, priced or not. Prices are listed unit prices at 100, 1,000 and 10,000 pieces, read from public distributor product pages with an exact part-number match; each links to its page with the time it was read. Where no real price could be read, the row says no public price found and why. Nothing was bought or quoted.

Sites that blocked reading from this server: LCSC: LCSC edge (Akamai) answers 403 'Access Denied' to this server (probe https://www.lcsc.com/product-detail/C2913202.html -> HTTP 403 at 2026-10-14T11:04:20Z); not fetched; Mouser: bot block (HTTP 200, 'Access to this page has been denied'); also blocked in headless Chromium in a probe

How the subtotal is made: for each BOM line, the lowest listed price among its candidate parts at that quantity (in USD; other currencies are summed separately). Alternatives for the same line are never added together. A line used more than once per device (the microphone, 2 per device) is counted that many times. Candidates outside the spec (for example an LTE Cat 4 module on the LTE-M / Cat-1 line) are shown as alternatives and not added. Lines with conflicting listings, per-LED prices without a count, and optional lines are not added. A price that one distributor shows on three or more different zero-stock part numbers counts as a placeholder, not a price. “Same listed break” means the page shows no lower price for the larger quantity: the same break applies. The subtotal is not a product cost and not a BOM total: it covers listed part prices of the priced lines only and excludes housing, assembly, test, certification, freight and duties.

Other cost lines

Shown only where a public page states prices. Everything else needs quotes from suppliers, which this concept has not asked for.