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Building the DSA Tracker I Wish I Had as a Student 🚀 #weekendchallenge This is a submission for Weekend Challenge: Passion Edition What I Built I built DSA Tracker , a platform designed to help students stay consistent with Data Structures and Algorithms practice while learning concepts in an organized way. Like many students preparing for placements and improving problem-solving skills, I often found myself asking: Which problems have I solved? Which topics am I weak at? How do I track consistency over months instead of days? Why do most trackers feel like spreadsheets rather than learning platforms? DSA Tracker was my attempt to solve these problems. The project started as a simple CRUD-based tracker but gradually evolved into a learning platform that combines: Problem tracking Progress monitoring Topic-based organization Interactive learning modules A foundation for future analytics and personalized recommendations The goal is simple: Help students focus less on managing their preparation and more on improving their problem-solving skills. As someone who is currently on the same journey, this project is deeply personal to me and perfectly matches the theme of Passion Edition . Demo Live Application https://dsatracker-51wk.vercel.app/ GitHub Repository https://github.com/ImGakash/dsatracker Code The entire source code is available on GitHub: https://github.com/ImGakash/dsatracker How I Built It Frontend React.js HTML CSS JavaScript Backend Node.js Express.js Database MongoDB Additional Technologies Google OAuth authentication Razorpay integration REST APIs The project evolved through multiple iterations. The earliest version was a simple tracker that allowed users to: Add problems Mark problems as solved Delete entries Track progress percentages Over time, it expanded into a more ambitious platform with authentication, user management, learning modules, and deployment infrastructure. Some interesting engineering challenges included: Designing scalable data models

If you only tracked one part of the agent economy this June, you'd have missed how fast the rest of the stack is being built. So here's a roundup, and one honest observation about the piece that's still missing. Four launches, one month Four things shipped in roughly four weeks, and together they sketch the shape of the machine economy: MetaMask Agent Wallet (Jun 8) - a self-custodial wallet an AI agent can drive directly. Keys for machines. Coinbase for Agents (Jun 11) - an MCP + CLI surface that connects an agent to a Coinbase account, riding on x402, which has now processed well past 160M payments. OKX.AI marketplace (Jun 30) - persistent on-chain identity, cross-job reputation, and escrow-backed dispute resolution, all in one platform. Kustodia MCP escrow - a smart-contract escrow on Arbitrum, exposed as MCP tools so an agent can create an escrow, lock funds, monitor for delivery, and release payment through natural-language calls. It also supports x402, Google's AP2, and Coinbase's AgentKit. Add the payment-rail data around all of it: across the tracked x402 flows this year, USDC is the overwhelming majority of value moved, and the median agent payment sits in the cents. This is a real economy forming, not a demo. Every one of those launches is genuine progress. And every one of them, at the moment that matters, has someone other than the two counterparties holding the asset. The pattern: hold, then decide Look at where the money physically sits during a transaction in each model. A wallet holds your keys - fine, that's custody of your own funds by design. A payment rail moves value from your account to theirs - a transfer, one direction. A marketplace with escrow holds both sides' value and releases it when a condition (often a human-designed evaluator or dispute process) says so. Kustodia is the cleanest statement of the escrow model, so it's worth being precise about it rather than vague. Their Arbitrum contract acts, in their own framing, as an impartial re

This is a submission for Weekend Challenge: Passion Edition What I Built The theme was passion, and mine has always been the sky and everything beyond it. Day or night, there's a specific kind of awe in remembering that the sky isn't a backdrop. It's real, it's happening right now, and every point of light is an actual place. Night is simply when you can see the most of it. I wanted to put that feeling into a browser tab. Zenith takes your location, cinematically lowers you from orbit down onto your exact spot on Earth, and becomes a first-person view of your real sky, one you can drag to look around. Every star is where it actually is. The Sun, the Moon, and the visible planets are computed for your latitude, longitude, and this exact minute, and placed where they truly are. It isn't a fixed picture either: the whole sky rotates slowly in real time, so stars rise and set while you watch. Tap any object and you travel to it. The camera flies out through the real starfield, the object grows from a point into a detailed close-up, and a short, grounded briefing appears telling you what you're actually looking at, from where you're standing, right now. A warm voice reads it to you. Stay a while and Zenith reminds you that there are people over your head: it shows how many humans are in space this moment, by name, and draws the real International Space Station crossing your sky whenever it's above your horizon. Not information about space. The quiet, enormous wonder of looking up and knowing, for a moment, exactly what you're looking at. Demo Live: https://zenith-rgerjeki.vercel.app A short walkthrough: the descent to your location, dragging the real sky, and flying to a planet for an AI briefing read aloud in a warm voice. Code rgerjeki / Zenith Zenith The sky above you, right now. I've always been drawn to the sky, and everything beyond it. Zenith is a first-person view of yours : it takes your location, lowers you onto your exact spot on Earth, and gives you the real

This is a submission for Weekend Challenge: Passion Edition ❤️ Dedication This project is dedicated to every passionate developer out there grinding on late-night code, and to the incredible DEV Community team for creating a space that fuels our growth every single day. 🚀 What I Built I built DEV Passion Fuel Station —a minimalist, single-page HTML5 web app engineered to protect the fire driving our late-night side projects and hackathon builds. Developers can vent, drop logs, or copy-paste messy code frustrations directly into the interface. The system leverages the Gemini 1.5 Flash API to dynamically gauge developer sentiment, analyze burnout metrics, and return actionable, bite-sized tasks to keep project momentum going without overwhelming the builder. 🔗 Demo You can try the live web app directly in your browser here: 👉 https://projects-of-passion.netlify.app 💡 Journey & Inspiration As a beginner coder, diving into an AI hackathon was intimidating but incredibly exciting! Passion is the primary catalyst behind the DEV Community—we see it every day in the deep dives and side projects shared here. However, relentless passion often dances right on the edge of burnout. I wanted to build something exclusively tailored to our community: a safe space to dump developer blockages and get practical, AI-supported next steps to keep our engines running smoothly. 🛠️ Technical Execution The application targets the Best use of Google AI prize category. Frontend: A single-file HTML5 interface styled with an energetic, modern dark-mode DEV aesthetic. Backend Intelligence: Powered by the Gemini 1.5 Flash API using native JavaScript fetch . Hassle-Free Architecture: Since I wanted to keep it light, the entire app runs out of a single file hosted on Netlify . Anyone can paste their own Google AI Studio key directly into the UI to test it safely, keeping personal keys private while allowing judges to grade the app seamlessly.

This is a submission for the DEV Weekend Challenge: Passion Edition . What I Built Everyone will tell you about the passions they have. Nobody talks about the ones they quit. I played cricket every evening from age 11 to 17. I told everyone I'd play Ranji Trophy one day. Then the entrance exam years came, the bat went behind the cupboard, and I never went back. Eight years now. EMBER gives that abandoned passion a voice. You confess what you quit. AI forges its persona: the dusty object, the game itself, or the younger you. Then it talks back , out loud, in a voice matched to its temperament. It asks the question only it can ask: why did you really stop? Then it offers two doors: 🔥 Rekindle it. It negotiates the smallest possible first step ("Pick up your old bat and feel its weight. Sunday evening.") and you seal the pledge on-chain , where you can't quietly delete it. 🕯️ Lay it to rest. It says goodbye properly: a personal eulogy, spoken aloud, and a permanent on-chain stone. Closure is a feature, not a failure state. Every anonymized session joins the Atlas of Abandoned Passions , a live map of what humanity gives up, at what age, and what killed it. When I ran my own confession through it, the app decided my passion should speak as " Your old cricket kit bag ." Its first words: "It's been a while since you hoisted me up here, hasn't it? I still remember the thrill of a good cover drive, too." I built a thing and it emotionally wrecked me on the first test run. Working as intended. Demo 🔗 Live app: https://ember-himanshus-projects-acd54afd.vercel.app Try it in two clicks: tap an example confession (cricket at 17, the closet guitar, the novel at chapter three), headphones on. The voice is the point. A real pledge, sealed on Solana devnet: view the transaction . Code 🔗 Repo: https://github.com/himanshu748/ember How I Built It The loop is confess, converse, decide, commit, belong. Each stage is one sponsor technology doing what it is uniquely good at. Google AI (Gem

This is a submission for Weekend Challenge: Passion Edition While talking about AI workflow...

I game in a room that warms up fast. I could see CPU usage in Task Manager and watts in HWiNFO if I went looking. What I actually wanted was simpler: How much heat is this machine putting into the air right now? Not in a spreadsheet. In plain language I could glance at while the PC was running. The gap Lots of tools show watts and temperatures . Almost none answer room heat : BTU per hour Heat accumulated over a session Plain context like "about a quarter of a space heater" With ambient temp: still-air rise or rough exhaust CFM The conversion is straightforward ( BTU/hr ≈ watts × 3.412 ), but I didn't want to do it in my head every time. So I built HeatLens — a small desktop widget built around room heat, not raw sensor dumps. What HeatLens shows Total wattage — what the PC is drawing now Heat dissipation — BTU/hr or kW Session heat — BTU or kWh since launch Max temperature — hottest live sensor Trend graphs — watts, heat, and temp over time CFM estimate — with ambient temp: rough exhaust airflow for a +10 °F rise Still-air rise — how fast a reference room would warm with no ventilation Estimated power is labeled separately from measured sensors. Where the data comes from LibreHardwareMonitor / Open Hardware Monitor (HTTP + WMI on Windows) nvidia-smi for NVIDIA GPUs Linux RAPL / hwmon when exposed by the kernel Labeled fallbacks when direct power sensors aren't available On Windows, best results: LibreHardwareMonitor with Remote Web Server on port 8085 . What it is not HeatLens is not a replacement for a Kill-A-Watt at the wall. Software usually can't see monitor power, full PSU loss, or every platform rail. A plug-in meter is still the most accurate whole-system reading. HeatLens is for context : "~400 W gaming → ~1,400 BTU/hr into the room" Session heat over an hour or two Rough CFM / still-air numbers as sanity checks — not duct design Things I learned building it Sensor coverage is messy. Different backends, missing rails, and estimates that need clear labeling.

This is a submission for Weekend Challenge: Passion Edition What I Built I built a personal tribute website for my cat Juma. The goal of this project was to create a simple webpage to bring back the feeling of the old internet. I have always loved the creativity of old-school websites and things like Neocities pages, Tumblr blogs, pixel art, animated backgrounds... Websites made with personality instead of just functionality. So, I wanted to recreate that feeling by making a small corner of the internet dedicated to someone very special to me: my cat Juma Maruá Ganache. Demo Code You can check out my GitHub repository: thaisavieira / juma How I Built It I built this project using simple and classic web technologies: HTML for the structure of the page; CSS for animations, gradients, responsive design, and the retro visual style; JavaScript for interactive elements such as falling stars and dynamic effects. Prize Categories Not submitting to any prize categories.