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Products that do what I made a new sensor out of 3D printer filament for my PhD does
Here's a "behind-the-scenes" look at my development of a cool sensor during my PhD (electrical engineering). This sensor is only about 1/3 of my total research for my degree and took about a year. I've been on HN for a while now and I've seen my fair share of posts about the woes of pursuing a PhD. Now that I'm done with mine I wanna share some anecdotal evidence that doing a PhD can actually be enjoyable (not necessarily easy) and also be doable in 3 years. When I started I knew I didn't want to work on something that would never leave the lab or languish in a dissertation PDF no one…
- 1AF
I've seen some interests in (simulation) video games here on HN so I thought I'd share a short version of our story. More than 6 years ago, me and my friend from university were playing around with an idea of making a game we always wanted to play. We worked on it on weekends but the progress was quite slow, especially due to so many dead ends and wasted effort. Eventually however, we solidified our direction and decided to take the risk to resign from our well paid SWE jobs and work on it full time. It took more than a year but yesterday we have finally released it on Steam:…
2022
- 2ID
3D printing is such a fascinating field of technology, so a couple months ago, I decided to take a deep dive and learn how they actually work! This took me to one of my very first PCB projects, a small, cheap, 3D printer motherboard. While it's not the most cutting edge board, I learned a lot and I fully documented my process designing it (https://github.com/KaiPereira/Cheetah-MX4-Mini/blob/master/J...), so other people can learn from my mistakes! It runs off of an STM32H743 MCU, has 4 TMC stepsticks with UART/SPI configurations,…
Dec 2025 · github.com
- 3IM
Hey HN, I want to share a personal project: I made a tiny pen-plotted book for my wife. I did everything myself—drawings (with some help from Midjourney), plotting, cutting, and binding. I even used a 3D printer to make a helper tool. It's absolutely over-engineered, but I enjoyed it a lot. Multi-disciplinary projects, especially those with a physical output, are a lot of fun for me. The post covers the process in detail, but if you're interested in anything specific, let me know. Cheers!
2025 · muffinman.io
- 4SP
Hi HN, Over the past 6 months I've been working on a technical book focused on helping aspiring data scientists to get hands-on experience with cloud computing environments using the Python ecosystem. The book is targeted at readers already familiar with libraries such as Pandas and scikit-learn that are looking to build out a portfolio of applied projects. To author the book, I used the Leanpub platform to provide drafts of the text as I completed each chapter. To typeset the book, I used the R bookdown package by Yihui Xie to translate my markdown into a PDF format. I also used Google docs…
2020
- 5IB
We wanted to do something very challenging to prove to ourselves that we can do anything we put our mind to. The reasoning for why we chose to build a toy TPU specifically is fairly simple: - Building a chip for ML workloads seemed cool - There was no well-documented open source repo for an ML accelerator that performed both inference and training None of us have real professional experience in hardware design, which, in a way, made the TPU even more appealing since we weren't able to estimate exactly how difficult it would be. As we worked on the initial stages of this project, we…
2025 · tinytpu.com
- 6IB
Hi HN, After watching a lot of Show HN's here, it's finally my turn to show something. This is the first real project I have shipped, so it is extra special to me. For those who will inevitably ask why I made yet another mockup editor I covered it on our blog (http://blog.mocktailsapp.in/why-build-yet-another-mockup-editor-tm). Not all the features mentioned in that post have been implemented yet. As such Mocktails is pre-beta software and very minimal. It does not even have user accounts or any actual server side component at all for that matter (yet)! Our intention is to build Mocktails…
2012
- 7AM
I started https://signalprocessingjobs.com/ to organize a couple of side projects I have: - a job board for signal processing engineers - Journal2MATLAB: a blog that turns academic papers into MATLAB code - some work on using cocotb for verifying DSP HDL - and some MATLAB code snippets i keep coming back to Hope others in the community find it useful :)
2023 · signalprocessingjobs.com
- 8MP
Hi I'm the developer of UX-App if you have any questions then fire away :) Just thought I'd give you all some background. I'm a high school teacher by day and developer by night. I was bitten by the start-up bug a few years ago and UX-App is my first product launch. In between a full time job and a 5 month old at home it has taken about 3.5 years to complete the project. I'd like to think its a unique product that holds its own against the existing competition and even has some features that no other tool has. My favorite aspect is the visual code builder which allows designers to easily…
2015
- 9BA
I am a Dutch high school student and last year I had to do a large project of my own choice. Together with two other guys I decided to do a project about digital logic. We had an ambitious plan: building an 8-bits computer. At that time I started learning programming and I already knew some HTML and CSS. So we decided to not build a physical computer, but one running in a self-built simulator. I was going to build the simulator, the other guys took care of the computer. I was hard, our school hadn't taught us anything about computers and programming so we had to learn everything ourselves.…
2017
- 10IM
I am a non-hacker "idea guy" with zero discernible talent. Like most, the story starts with me doing things the hard way. I dreamt of a tool that would save me countless hours. Like most of my ideas, it was supposed to die in a couple of hours, but this one had some legs.... "If I needed this, surely others did too" kept looping in my head. Could I get this built? Could I build it myself? Nah...too lazy to learn how, but before I did anything, I had to promise myself one thing: No more ideas! If ideas were sit-ups, I would have a six pack instead of this tire. It was a constant mental…
2012
- 11EA
Just finished a super-nerdy amateur hobby project: An exhibit and website to show kids how cool mechanisms are! Sadly, kids don't get much tangible experience with machines anymore. Ideally, this exhibit will inspire some to explore engineering, even if they are not "book learners". The website provides content to back up the exhibit, with videos and 3D printing files. The project is inspired by engineering exhibits from the past. Check out the research page for more. The project will be open-sourced to enable people to make their own and extend it. If you want to collaborate, LMK. --Steve
2025 · mechanical-library.org
- 122G
4 months ago sucked. Our technical co-founder quit after 6 months and we still had no product. My co-founder and I had been 'working' on our startup for 8 months. I say 'working' because as the "business people" - there wasn't a whole lot we could do except philosophize. We had gotten really awesome intros to some of the top VCs and entrepreneurs, but had nothing to show. And now we felt stranded. Had we wasted 8 months of our lives? Identity crisis? Check. So we did what any rational person would do - we ran to the mountains. Literally. In Boone, NC - we talked about why we started Knowit,…
2012
- 13OP
2022 · github.com
- 14PS
Hi HN, This one's a twofer. First, I'm showing off my personal site and blog, garrettgoss.com [1]. I'm looking to make a career change — from biomedical engineering/biomedical research, to research and development engineering in the consumer product development/additive manufacturing space — and felt that my prior work experience inadequately reflected my true interests and skills, which are better exemplified by my side projects. I put this together for myself, to better document my own work, for the broader internet, to share some of the projects I've developed to those who might…
2019
- 15IC
I spent the past week implementing a 1 Layer Neural Net and training it on MNIST within the visual scripting language provided by scratch.mit.edu. It was tedious, but ultimately not too difficult. The code runs incredibly slowly, so much so that 64 samples of MNIST takes 5+ hours to train on my machine. There were a lot of little mini challenges that were fun to overcome (implementing softmax was very tricky). If you're interested, I encourage you to try and improve on it! More details in the linked blog post.
2024 · bell-boy.github.io
- 16FP
A little background. For the last 1.5 years I lost what could be considered an embarrassing amount of money hiring other people to work on a project that I thought had potential, I got some important people involved, had some great coders, but couldn't launch. The failure was depressing, rejection by YC didn't help.. I had to take a job, I didn't enjoy and I had a girlfriend who stood by me despite going into debt. But bouncing back over the last 45 days I've taught myself Rails some Jquery, and Javascript and built this www.hangout.io. It's empowering to build something myself because I'm…
2011
- 17WM
Hi HN, I’ve spent the last decade building hardware products like humanoid robots, 3D printers, and self-driving tractors. I needed a tool to navigate technical documents faster, so I created one with friends. This tool helps with component search, cross-referencing, comparison, and debugging. We’d love your feedback, whether you find it useful or not. Thank you! Try it here: www.convergelab.ai
2024 · convergelab.ai
- 18CR
Hi, this is Andrew (arhpreston) and Ben (benjyk) from Cassyni (https://cassyni.com). We both completed PhDs in physics before going on to found Publons and Kopernio, companies that were acquired by -- and became a part of -- Web of Science, a product researchers on HN may be familiar with. It is well known how important academic seminars are for networking, promoting your research, and keeping up with latest developments. But the scale is under-appreciated: by our estimates more than 1 million academic seminars were happening every year. And then Covid came along... As a result…
2021
- 191P
This project took me 1 year to complete, all by my lonesome self. What do you think? Comments appreciated! www.enrad.io
2016
- 20IB
I've never posted on ShowHN before, but I wanted to share my Xmas 2025 project; to try a new approach to controlling our kids screen time. This also involved massively over-engineering a solution in order to play with a shiny new gadget (and avoid the in laws at Christmas, obviously) I've shared some learnings on AI coding with embedded devices, and how I approached the product design/hardware selection side of things. The Web App is at https://screenie.org - and I'm Open Sourcing the device and web app code later today (links to follow on that site)
Jan 2026 · partridge.works
- 21RO
I wrote up a retrospective on my time working as a founder at DirectAI (https://directai.io). We learned a lot and I wanted to share some things I wish I had known ~18 months ago.
2024 · brooks.team
- 22IB
Hi HN, I’ve been tinkering with this for a while and finally have it in a decent state. It’s a plotter robot that draws caricatures from photos. I trained a diffusion model (Flux Kontext LoRA) on caricature images, 3D-printed a Sharpie mount for my Ender 3, and hacked together a pipeline that goes photo → caricature → G-code. After a lot of trial and error it’s working pretty well, and I put up a little site where you can try it out. Happy to answer questions or hear any feedback. Thanks!
2025 · caricature-bot.com
- 23SA
Over the past three months, I’ve been working with my dad on this app as a way to learn Cursor, shadcn/ui, and Next.js. I’m currently studying UX design at the University of Michigan, and I’ve been really impressed by how much vibe-coding tools have advanced over the last six months. This work journal includes private AI-generated insights with scheduled summaries that can be shared with your team or manager. You can also choose to make a summary public—like I’ve done here for my work on this web app: https://www.workjourney.ai/summary/mkblt2zt-hn2kdbus If anyone has…
Jan 2026 · workjourney.ai
- 24IG
Here's a video of it in action https://twitter.com/i/status/1667355251773526016 I didn't end up using it that much back then and no one else seems to have cared it existed, but it was a project I used to derust my programming skills and I'm to this day proud of the flamboyant design. To anyone reading this: you don't have to let your old code rot away in the graveyard of distant memories just because times change. With enough persistence and a little perseverance anything is possible. Code doesn't have an expiration date. -day
2023 · github.com
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