Editorial note: This publication and Quirky Cotton Collective share an owner. The garment preview shows a dark shirt with very small, centered lowercase meh. lettering. No animal. No pride variant. No decorative frame. The period is there, and it matters more than the word. Most slogan shirts work like a badge: large type, high contrast, …
Continue reading The Small Lowercase ‘meh.’ Shirt Is a Boundary, Not a Badge
The Root Vegetable Shirt Is a Diagram of Two Different Promises
Four root vegetables smile out from the shirt: a carrot, a radish, a beet, and an onion, their roots drawn down into a band of soil. Around them, in capitals, the shirt reads LET’S ROOT FOR EACH OTHER AND WATCH EACH OTHER GROW. The pun is doing two jobs at once, and that is the …
Continue reading The Root Vegetable Shirt Is a Diagram of Two Different Promises
The Composition Notebook Shirt Is a Diagram, Not a Costume
The garment image shows a black-and-white speckled rectangle, a dark binding strip down the left edge, and a white ruled label headed COMPOSITION. Inside the label: an outlined ghost and an outlined pumpkin. That is the whole design. It is a printed notebook cover, not a physical notebook, and the listing calls it a teacher …
Continue reading The Composition Notebook Shirt Is a Diagram, Not a Costume
The Radio That Lost 6 dB When the Buck Converter Woke Up: Self-Desense, Harmonic Planning, and Spur Tables
Your prototype radio worked fine on the bench. Then you enabled the buck converter, and the link margin dropped by 6 dB. The receiver didn’t fail. The transmitter didn’t fail. The power supply started switching, and the radio started listening to its own power rail. This is self-desense: a receiver’s sensitivity degradation caused by an …
Continue reading The Radio That Lost 6 dB When the Buck Converter Woke Up: Self-Desense, Harmonic Planning, and Spur Tables
The Golden Board That Disagreed With the Fixture: Test Limit Correlation, Guardbanding, and GR&R at the CM
Your prototype passed. Your golden board passed. The fixture says the golden board failed. That is not a board problem. That is a measurement-system problem, and at 1kâ10k unit volumes it is the kind of problem that eats a week of engineering time and produces a shipment hold that nobody can explain to the customer. …
Continue reading The Golden Board That Disagreed With the Fixture: Test Limit Correlation, Guardbanding, and GR&R at the CM
The Bathtub Curve That Was Actually a Cliff: Weibull Analysis of Field Returns and the Burn-In Decision
Every reliability deck has the same slide: the bathtub curve. Infant mortality on the left, a long flat useful life in the middle, wear-out on the right. It is a comforting shape. It implies that if you burn in your product long enough, you scrape off the early failures and ship the flat part. Then …
Continue reading The Bathtub Curve That Was Actually a Cliff: Weibull Analysis of Field Returns and the Burn-In Decision