NFC Energy-Harvesting PCB Business Card with an MCU
We haven't written up this one. Hacker News has the full story — the link below goes straight to it.
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Designing an RCTI Workflow: Validation, Money, Snapshots, and PDFs
An invoice form looks simple until the software has to preserve what was true when the document was issued. That problem is especially visible with an Australian recipient-created tax invoice (RCTI).
Dev Collective
I'd like to find a group, ideally on Slack, where serious devs work semi-together on side-projects. They use the same AI Agents, MCPs, and similar tech stacks.
If-Match: two curls, one 412
Two tabs save the same note. Last write wins. The first tab's words vanish. Two terminals on your laptop are two tabs. You GET. You type. You PUT. Save this as if-match-server.mjs .
- Two tabs overwrite same note, first tab's content vanishes
- GET request returns 200 with note text and ETag
- PUT request updates note if IF-Match header matches ETag
flash-zk: a server-blind encrypted database for private AI
Most AI databases can read you. This one is designed not to. Sealed envelopes. Blind indexes. The key never lives on the server.
Insta360 has given its flagship 4K webcams an icy cool glow-up — now available in arctic white
Insta360 has updated its flagship 4K webcam with an arctic white finish. Where to buy, price, specs.
Pulsar's new mouse is sliced in half to make it genuinely 'crazy-light'
'I swear it came like that,' I say as I chew through half a mouse.