![Screenshot of youtube.com: I built a drone with only one motor [video]](https://hn.urlbox.com/shots/renders/2026/10/19/5b17e313-c36e-4365-9533-ae8a8b432408.jpg)
I built a drone with only one motor [video](youtube.com)
624 points by hakonjdjohnsen | 139 comments
YouTube video by Joshua Bird showing how he built and flew a drone that uses only a single motor.
#diy-electronics on Hacker News
34 stories tagged diy-electronics, newest first.
Laptop Based on 6502 CPU(maddox.pro)
184 points by nanochess | 94 comments
A personal tech blog post describing a homebrew laptop built around the 6502 CPU; the captured view shows only the blog header and archives.
16-bit fully functional DIY magnetic core memory(youtube.com)
58 points by oliculipolicula | 18 comments
A YouTube video from Japanese channel dydt製作所 demonstrating a DIY, fully functional tiny 16-bit magnetic core memory board built with 1970s East German cores.
PSPi 6 – Raspberry Pi in a PSP(github.com)
125 points by therepanic | 12 comments
GitHub repository for PSPi Version 6, an open hardware project that fits a Raspberry Pi into a Sony PSP shell, with board files and firmware.
Show HN: Making a flexible "neon" t-shirt with LED filaments(scottbezek.blogspot.com)
200 points by scottbez1 | 36 comments
Blog post by Scott Bezek describing how he designed and built a wearable neon-style t-shirt using flexible LED filaments in a few days.
Surely you have ultra-wideband radios on your bins too?(sjg.io)
142 points by simonjgreen | 78 comments
A personal blog post describing an over-engineered project using ultra-wideband radios on trash bins so Home Assistant can tell whether the bins have been put out.
Muse Gadgets(gadgets.muse.ai)
232 points by anant | 104 comments
Landing page for Muse Gadgets, open source DIY devices built on ESP32 or Raspberry Pi with SDKs to connect the Muse assistant to displays, buttons, and sensors.
A physicist rigged his pet hamster’s wheel to upload to Strava(runnersworld.com)
423 points by aanet | 97 comments
Runner's World news article about a physicist who connected his pet hamster's wheel to upload nightly runs to Strava, revealing how far it runs.
Flipdiscs(flipdisc.io)
542 points by skogstokig | 85 comments
A site about building a large interactive flipdisc (flip-dot) wall display, explaining the electromagnetic display technology with guide and docs sections.
![Screenshot of youtube.com: Making RAM at Home [video]](https://hn.urlbox.com/shots/renders/2026/4/22/b9519d3a-7df0-49af-bee5-6355301e2055.jpg)
Making RAM at Home [video](youtube.com)
571 points by kaipereira | 162 comments
YouTube video by Dr.Semiconductor, about 18 minutes long, documenting an attempt to fabricate RAM memory chips at home.
Jimi Hendrix was a systems engineer(spectrum.ieee.org)
643 points by tintinnabula | 227 comments
IEEE Spectrum article arguing Jimi Hendrix acted as a systems engineer, precisely controlling modulation and feedback loops in his guitar rig.
Converting a $3.88 analog clock from Walmart into a ESP8266-based Wi-Fi clock(github.com)
583 points by tokyobreakfast | 186 comments
GitHub repository with an Arduino sketch and schematic for driving a cheap analog quartz clock with an ESP8266 to show NTP-synced local time.
![Screenshot of youtube.com: I built a light that reacts to radio waves [video]](https://hn.urlbox.com/shots/renders/2026/1/23/27993923-5a01-4c5a-bf85-b4cb88ce46f2.jpg)
I built a light that reacts to radio waves [video](youtube.com)
432 points by codetheweb | 97 comments
YouTube video by Rootkid showing a self-built light installation that visualizes nearby radio wave activity.
Floppy disks turn out to be the greatest TV remote for kids(blog.smartere.dk)
701 points by mchro | 399 comments
A personal blog post describing a DIY TV remote for kids that uses floppy disks to select what to watch, avoiding complicated remotes and auto-play apps.
Z2 – Lithographically fabricated IC in a garage fab(sam.zeloof.xyz)
333 points by embedding-shape | 76 comments
Sam Zeloof's blog post about the Z2, a homemade 1000+ transistor array chip made by lithography in his garage fab, following his 2018 Z1 amplifier.
Show HN: I built a synth for my daughter(bitsnpieces.dev)
1227 points by random_moonwalk | 205 comments
Blog post by Alastair Roberts describing a homemade, kid-friendly synthesizer with colorful knobs and a small display that he built for his daughter.
Show HN: I've built a tiny hand-held keyboard(github.com)
377 points by mafik | 102 comments
GitHub repository with firmware, board files, and layout generator for making a KEYER, a one-handed chorded hand-held keyboard.
Show HN: I spent 6 years building a ridiculous wooden pixel display(benholmen.com)
1056 points by benholmen | 135 comments
Blog post by Ben Holmen describing his six-year project building Kilopixel, a 1000-pixel wooden mechanical display that anyone online can draw on.
Show HN: FlopperZiro – A DIY open-source Flipper Zero clone(github.com)
338 points by iraton | 73 comments
GitHub repository for FlopperZiro, a cheap DIY open-source Flipper Zero clone built with Arduino IDE, including PCB schematics and firmware.
Show HN: Bayleaf – Building a low-profile wireless split keyboard(graz.io)
664 points by sgraz | 223 comments
A case study by the builder of Bayleaf, a DIY wireless, split, ultra-low-profile keyboard, covering electronics, PCB design, and manufacturing.
Homemade polarimetric synthetic aperture radar drone(hforsten.com)
566 points by picture | 56 comments
Blog post by Henrik describing building a homemade polarimetric synthetic aperture radar mounted on a drone.
Building a T1D smartwatch for my son from scratch(andrewchilds.com)
561 points by andrewchilds | 78 comments
Andrew Childs' blog post about building a custom smartwatch from scratch to display his son's type 1 diabetes glucose readings.
Show HN: I made an open-source laptop from scratch(byran.ee)
3037 points by Hello9999901 | 316 comments
A blog post by Byran describing how he designed and built a highly integrated open-source laptop from scratch, with CAD and GitHub links.
Fluid Simulation Pendant(mitxela.com)
442 points by sschueller | 61 comments
A mitxela.com project page describing a handmade gold-plated pendant with an LED matrix display running a realtime FLIP fluid simulation.
Build a Low-Cost Drone Using ESP32(digikey.com)
409 points by m3at | 138 comments
A DigiKey Maker.io project guide with video showing how to build a low-cost quadcopter drone using an ESP32 microcontroller.
Show HN: RF Hunter – Find hidden cameras and other devices(github.com)
523 points by RamboRogers | 160 comments
GitHub repository for RFHunter, an ESP32-based RF signal scanner with an AD8317 detector and OLED display for finding hidden cameras and bugs.
Hackberry-Pi_Zero – A handheld Linux terminal using Raspberry Pi Zero 2W(github.com)
550 points by felixr | 145 comments
GitHub repository for Hackberry-Pi_Zero, an open-source handheld Linux terminal built on a Raspberry Pi Zero 2W with a 4-inch 720x720 TFT display.
Trading cards with e-ink displays (2023)(howtoware.co)
381 points by edye | 131 comments
A blog post by Jonah Stiennon describing how he built trading cards using e-ink displays, shown in a playing board with buttons.
Homemade 6 GHz pulse compression radar(hforsten.com)
402 points by henrikf | 106 comments
Blog post describing the design and construction of a homemade 6 GHz pulse compression radar, comparing FMCW and pulse radar architectures.
I designed a cube that balances itself on a corner(willempennings.nl)
2346 points by dutchkiwifruit | 365 comments
Willem Pennings' personal project page describing a self-designed cube that balances itself on a corner, with photos of the build.
![Screenshot of youtube.com: The coolest robot I've ever built [video]](https://hn.urlbox.com/shots/renders/2023/11/7/1e43cd69-4fce-44ca-b5d5-5d46431d4caf.jpg)
The coolest robot I've ever built [video](youtube.com)
331 points by superasn | 137 comments
A YouTube video by Thomas Burns showing a homemade robot with animatronic eyes and a small CRT screen as its mouth.
Show HN: Building a 42-inch E-Ink frame for generative art(eliot.blog)
484 points by ea016 | 173 comments
A blog post describing how the author built a 42-inch E Ink frame to display generative AI art in the PhotoRoom office.
Pineapple ONE: open-source 32 bit RISC-V CPU that you can make at home(pineapple-one.github.io)
449 points by todsacerdoti | 57 comments
Project homepage for Pineapple ONE, an open-source 32-bit RISC-V CPU designed to be built at home, with links to GitHub, Twitter and Discord.
Privacy friendly ESP32 smart doorbell with Home Assistant local integration(tristam.ie)
362 points by rcarmo | 152 comments
A blog post about building a privacy-friendly ESP32 smart doorbell integrated locally with Home Assistant; the page returned a Cloudflare 502 error.