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A short-duration wearable pulse-ox patch prototype

Hacker News - Wed, 02/18/2026 - 11:19pm

Hi HN,

We’ve been prototyping a short-duration wearable patch designed for field or emergency response situations where quick physiological monitoring is useful. This was built in a few weeks using a collaborative hardware/firmware build environment that let us iterate logic visually before refining the firmware implementation. The goal of this early version is: can we build a small adhesive patch that activates immediately, measures pulse + SpO₂, and provides clear on-device feedback for ~30–180 minutes?

This is the current prototype: - Adhesive-backed strip/oval form factor - Reflective pulse oximeter sensor - ~30 min to 3+ hour runtime (depending on configuration) - LED indicators for status - Audible alerts for abnormal readings - Immediate activation when adhesive backing is removed (early units used a button) - 5-unit prototype run using off-the-shelf components

The device gives local feedback only (light + sound. There iso cloud connectivity in this iteration.

Green LED > functioning + vitals within threshold Red LED + audio > threshold exceeded or signal quality issue

We focused on: a) Fast iteration on firmware thresholds b) Basic motion tolerance testing c) Power management for short operational windows d) Adhesive-trigger activation mechanism e) Rapid hardware + firmware iteration cycle

Would love feedback from anyone who’s worked on wearable pulse oximetry, motion artifact reduction, short-duration medical device validation, adhesive-based wearables

Lemme know if anyone has technical questions.

Comments URL: https://news.ycombinator.com/item?id=47069878

Points: 1

# Comments: 0

Categories: Hacker News

Monitoring Data-Dependent Temporal Patterns

Hacker News - Wed, 02/18/2026 - 11:17pm

Article URL: https://imiron.io/post/fotl/

Comments URL: https://news.ycombinator.com/item?id=47069867

Points: 1

# Comments: 0

Categories: Hacker News

Electrobun v1: Build fast, tiny, and cross-platform desktop apps with TypeScript

Hacker News - Wed, 02/18/2026 - 10:46pm

I'm building a commercial macOS app with Electrobun [1]. I have previously written the same app with Tauri. I'll say that, while I love Tauri, using Electrobun has been an absolute breeze. I got the same app done in roughly 70% of the time [2]. It's a very productive stack. In no small part due to Electrobun, but also the fact that Bun has tons of DX niceties and a builtin bundler.

Electrobun lets you open/manipulate/close webview windows and communicate with them using typed rpc. It also handles building, code signing, and notarization.

And because I'm using Bun, running an HMR + React + Tailwind server is just one command (`bun ./index.html`) or like 5 lines of code. Pass --console and the webview's console.log()s get streamed to your Terminal too.

There's tons of other things Electrobun does that I haven't even mentioned, because I haven't interacted much with them yet. E.g. I know that it lets you show platform-native notifications, prompts/popups, etc.

There also is a very impressive updating mechanism that relies on a bsdiff implementation written in Zig. You just ship the deltas, so updates to very large apps are just a few KBs most of the time.

It's genuinely a very productive stack and impressive piece of tech.

[1] Not affiliated - I just like the project.

[2]: The API and implementation was clear, so I'll cautiously say this is not a case of "rewrites are always faster". In fact, the Tauri version was a rewrite too :)

Comments URL: https://news.ycombinator.com/item?id=47069650

Points: 9

# Comments: 4

Categories: Hacker News

Show HN: I just shipped the canonical neuro-symbolic control demo

Hacker News - Wed, 02/18/2026 - 10:43pm

Quick update on the SCPN Fusion Core: I just shipped the canonical neuro-symbolic control demo.

https://lnkd.in/eb-vSv4r

One notebook. Zero setup. Runs in <2 min.

What it shows: - Stochastic Petri net → verified SNN compiler (LIF + bitstream path) - Formal topology/liveness/boundedness proofs (with SHA256 proof bundle) - Closed-loop on *real DIII-D shot 166000* (beta-limit disruption precursor) - Full FusionKernel digital twin evolution under SNN control - Side-by-side: SNN vs PID vs MPC — RMSE, disruption flags, actuator commands, latency (sub-ms p95) - Deterministic artifact export → replay with identical states/actions/proofs

Notebook (executed outputs baked in, Colab button too): https://lnkd.in/eb-vSv4r

Full repo + RESULTS.md (honest metrics, DIII-D/SPARC validation, limitations section): https://lnkd.in/eTJMfWC8

I’m pruning the kitchen-sink modules this week (legacy/ folder incoming) so it becomes a clean control-only package.

Would love brutal feedback: - Does the formal verification approach look credible for real-time safety? - Anyone at DIII-D National Fusion Facility-D / Princeton Plasma Physics Laboratory (PPPL) / ITER Organization willing to throw more shots at it? - What’s the biggest red flag you see for actual hardware-in-loop?

AGPL, fully reproducible, happy to hop on a call or add features.

Cheers

hashtag#FusionEnergy hashtag#NuclearFusion hashtag#AI hashtag#MachineLearning hashtag#Tokamak hashtag#PlasmaPhysics hashtag#ControlSystems hashtag#Neuromorphic hashtag#SNN hashtag#PetriNets hashtag#OpenSource hashtag#EnergyTech

Comments URL: https://news.ycombinator.com/item?id=47069633

Points: 1

# Comments: 0

Categories: Hacker News

ClawJetty: Plug-In Personal OpenClaw Box

Hacker News - Wed, 02/18/2026 - 10:38pm

Article URL: https://clawjetty.com/

Comments URL: https://news.ycombinator.com/item?id=47069603

Points: 2

# Comments: 1

Categories: Hacker News

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