site: reviews — Kawran Bazar, Elevators, Cycloidal Gearbox (graduate from finds)

2026-08-02 01:57:12 -04:00
parent 30a0821ab0
commit d457814f9e
10 changed files with 140 additions and 1 deletions
@@ -6,6 +6,7 @@ shortlist: true
 link: "https://github.com/tom-ilan/cycloidal_gearbox"
 linkText: "GitHub"
 source: "Hacker News — Show HN"
+promotedTo: cycloidal-gearbox
 topics: [gadgets-and-toys, learning-and-reference]
 tags: [3d-printing, cad, open-source, engineering]
 description: "Three versions of a 3D-printed cycloidal drive — including the failed one — plus the Fusion 360 script that generates the tooth profile from scratch."
@@ -6,9 +6,10 @@ shortlist: true
 link: "https://john.fun/elevators"
 linkText: "john.fun"
 source: "Hacker News — Show HN"
+promotedTo: elevators
 topics: [web-tools, learning-and-reference]
 tags: [interactive, algorithms, explainer, free]
 description: "An interactive explainer on elevator scheduling — SCAN, LOOK and multi-car dispatch, all running live in the page at up to 25× speed."
 ---

-The SCAN algorithm was patented in 1961: ride to the top, reverse, collect everyone on the way down. LOOK stops at the highest floor actually requested, which is the behaviour you already expect from a lift. Both run live in the page at 1×, 5× or 25×, and a button drops five fresh calls into the shafts so you can watch the assign-it-to-the-nearest-car rule come apart in front of you.
+The piece dates SCAN to a 1961 patent: ride to the top, reverse, collect everyone on the way down. LOOK stops at the highest floor actually requested, which is the behaviour you already expect from a lift. Both run live in the page at 1×, 5× or 25×, and a button drops five fresh calls into the shafts so you can watch the assign-it-to-the-nearest-car rule come apart in front of you.
@@ -6,6 +6,7 @@ shortlist: true
 link: "https://www.atlasobscura.com/places/kawran-bazar"
 linkText: "Atlas Obscura"
 source: "Atlas Obscura"
+promotedTo: kawran-bazar
 topics: [travel-and-places, food-and-drink]
 tags: [markets, dhaka, night, street-food]
 description: "Dhaka's central wholesale market runs hardest in the middle of the night and has vanished by mid-morning, when the same block turns back into a business district."