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Ask HN: What are you working on? (July 2025)

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411–420 of 900 posts

Re: Ask HN: What are you working on? (July 2025)

#411

My roommate and I are still working on Tornyol, our mosquito killing drone! It uses ultrasonic sonar to detect mosquitoes, and missile control theory to ram into mosquitoes and grind them in its propellers. Our target platform is a 40 grams tinywhoop so it’s safe to fly everywhere and makes almost no noise :). A Roomba for mosquitoes! The main plus compared to traditional systems is that a drone can cover an enormous…

Holy wow, if this works well, I’d like to order a dozen!

Re: Ask HN: What are you working on? (July 2025)

#412
I've had a notion that LLMs can read Typescript types much better, than JSON schema types.

So, I've been tinkering around with a library that can generate schemas for structured JSON outputs, according to a Typescript-like custom schema definition: https://github.com/nadeesha/structlm

So far, I've been seeing promising results with accuracy on-par or better, but using 20-40% less tokens than JSON schemas.

Re: Ask HN: What are you working on? (July 2025)

#413
A while back I saw an RF lightning detector on HN (https://techlib.com/electronics/lightningnew.htm)

I redesigned it to be much smaller and cheaper (surface-mount), made it an IoT device, and various other changes. Will order PCBs in a bit, hopefully it works well.

We don't have anything like Blitzortung in SE Asia as far as I know, and it would be pretty useful to me to detect lightning storms before they hit. The obvious application is to add it to my motorbike (driving a motorbike in a heavy storm is a necessary but miserable part of life here).

Bigger picture, there's no market for it, simply because it's cheaper to not buy one (I live in a very cost-driven market). However it would be useful to me personally.

Re: Ask HN: What are you working on? (July 2025)

#414
I have launched VT, a product that I have been working on for more than 1 year. And I'm continuously improving it.

https://vtchat.io.vn

VT Chat, is a privacy-first AI chat application that keeps all conversations local while providing advanced research capabilities and access to 15+ AI models including Claude 4 Sonnet and Claude 4 Opus, O3, Gemini 2.5 Pro and DeepSeek R1.

Research features: Deep Research does multi-step research with source verification, Pro Search integrates real-time web search with grounding web search powered by Google Gemini. There's also document processing for PDFs, a "thinking mode" to see complete AI reasoning, and structured extraction to turn documents into JSON. AI-powered semantic routing automatically activates tools based on queries.

Built with Next.js 14, TypeScript, and Turborepo in a monorepo setup.

Re: Ask HN: What are you working on? (July 2025)

#415
post #145

I'm working on an update to my flashcards app, Fresh Cards. The current version has a lot of limitations, so I've been working on a rewrite that improves all aspects of the app, for nearly a year now. Most recently, I've been incorporating a lot of improved UX design. The app has always used a playlist metaphor, i.e. your database of flashcards is your library and you can sort them in different ways and then hit Play…

What's your design process? Any sketches, wireframes, other people testing? Also do you have a video demo or screencast?

My design process is heavy on prototyping directly in code. I usually start off with sketches in pen and paper and then a quick mockup of the UI directly using Swift code since my apps are for iOS and Mac only.

I don't have any testers on this new version at the moment, but I'm considering having some beta testing once I get closer to release. No videos either, but I'm planning on writing some blog posts going over some of the UI flows and new features in the app to help with promotion. Once I polish the lesson UI a little bit, I'll probably post a video on YouTube of it too.

Re: Ask HN: What are you working on? (July 2025)

#416
post #191

I am working on a site that allows kids to chat and play online with other kids. To connect, kids must have their parents sign up and connect with the parents of their friends. Kids can chat with their parents and family as well as other kids in their network. Messages can be monitored by parents. There are also other activities like a bot workshop where simple llm bots can be "programmed" by creating system prompts…

Interesting goals, and quite different from the norm. I assume you must have somewhat strong feelings about privacy and/or children having access to technology/internet/etc that has driven you to build this platform? As a happily childless late 30s married man, this is quite foreign to me; but I definitely recognise that there is passion driving this project… Could you talk some more about your inspiration and long t…

I’d say some of the downsides on the modern internet become much starker when your kids come up against them. As adults growing up through the birth of the internet we are kinda inoculated to it.

I suspect the lack of privacy is because the target audience is “kids” not “teens”. When my kids first discovered group chat in iMessage with their cousins it was fun for literally 30 minutes before it was tears and abuse - which was a really instructive lesson for me.

At that (primary school) age parents would almost universally know the parents of your kid’s out-of-school playmates - if only because someone tends to have duty of care at any time and who is where with whom needs to be figured out.

The feature set seems sound and frankly welcome and overdue to me!

Re: Ask HN: What are you working on? (July 2025)

#418
Veneer: a thin facade over Google Forms/Sheets (https://github.com/Leftium/veneer)

Some samples:

- https://veneer.leftium.com/v/s.1o5t26He2DzTweYeleXOGiDjlU4Jk...

- https://veneer.leftium.com/v/s.1pk4C9jFI02CnZaxo9obsD4oAmLla...

Vercel is ending support for Node v18. Instead of updating my old app, I decided to finish the rewrite of the better version. The old version currently powers this site: https://viviblues.com

Compare to the new version:

- https://viviblues.com/pretty/sheet?u=https://docs.google.com...

- https://viviblues.com/pretty/sheet?u=https://docs.google.com...

Re: Ask HN: What are you working on? (July 2025)

#419
I'm heads down building a workflow pipeline builder that executes Wasm Components as part of individual nodes within the pipeline.

Think Zapier or n8n, but you either use existing processing nodes or upload your own code, written of course in any language that compiles to Wasm Components.

It's week 2 but it works and it's live at https://pipestack.dev

Re: Ask HN: What are you working on? (July 2025)

#420

I'm making a personal app to help me visualise time passing. I get "time blind" when I'm fixated on something like work, programming, reading, research, etc. While it can be a good thing, it also means I forget to eat, don't take breaks, miss meetings, or just spend way too long doing one thing and end up wondering where the day went. Typical notifications don't seem to snap me out of it either. The app creates a thi…

This sounds really useful for me. Any way to share the code?
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