Ian's Secure Shoelace Knot
(fieggen.com)
Also known as the “Double Slip Knot”, this is a secure shoelace knot with a simple, symmetrical method of tying.
Also known as the “Double Slip Knot”, this is a secure shoelace knot with a simple, symmetrical method of tying.
I built an expandable solar roof for my Tesla
(reddit.com)
Hello Reddit, this is an update of the last year worth of work on a personal project of mine -- placing an expandable solar array on my Tesla. And like all the past builds, the blueprints will be online for anyone to access. The last prototype Beta2 had lots of great feedback, and I am excited to share RC1 (Release Candidate 1).
Hello Reddit, this is an update of the last year worth of work on a personal project of mine -- placing an expandable solar array on my Tesla. And like all the past builds, the blueprints will be online for anyone to access. The last prototype Beta2 had lots of great feedback, and I am excited to share RC1 (Release Candidate 1).
Oddly-Specific Cleaning Products
(aftermath.site)
When it comes to cleaning, I don’t like to overpay for watered-down chemicals. That’s why I tend to prefer cleaning products that I can buy in as concentrated a form as possible, preferably in bulk.
When it comes to cleaning, I don’t like to overpay for watered-down chemicals. That’s why I tend to prefer cleaning products that I can buy in as concentrated a form as possible, preferably in bulk.
Making Electronic Calipers
(kevinlynagh.com)
Have you ever wished for a 500 Hz, millimeter-precise linear position sensing system? Well you’re in luck — all you need is some circuit board, a basic microcontroller, and a wee bit of maths!
Have you ever wished for a 500 Hz, millimeter-precise linear position sensing system? Well you’re in luck — all you need is some circuit board, a basic microcontroller, and a wee bit of maths!
The Circuit Graver, an interesting new way to fab PCBs at home
(hackaday.io)
Carve PCBs at home using a machine you build!
Carve PCBs at home using a machine you build!
Designing a Home Radio Telescope for 21 Cm Emission
(arxiv.org)
This study presents the methodology for creating a cost-efficient radio astronomy telescope that can be used to detect 21 cm emissions (1420.405 MHz) and determine the distribution and kinematics of neutral hydrogen specifically in the Milky Way.
This study presents the methodology for creating a cost-efficient radio astronomy telescope that can be used to detect 21 cm emissions (1420.405 MHz) and determine the distribution and kinematics of neutral hydrogen specifically in the Milky Way.
My first DIY phone fix made me a self-repair believer
(theverge.com)
My first DIY smartphone repair project was off to an inauspicious start.
My first DIY smartphone repair project was off to an inauspicious start.
Make It Yourself
(makeityourself.org)
Across the world creative people are making high quality things of all kinds and sharing their work freely with all of humanity.
Across the world creative people are making high quality things of all kinds and sharing their work freely with all of humanity.
Open-source wheeled biped robot
(github.com/upkie)
Upkie is a fully open source self-balancing wheeled biped robot. It has wheels for balancing and legs to negotiate uneven terrains. Upkies are designed to be buildable at home using only tools and components ordered online, like mjbots actuators. You can develop in Python or C++, on Linux or macOS, then deploy your software to the robot's Raspberry Pi.
Upkie is a fully open source self-balancing wheeled biped robot. It has wheels for balancing and legs to negotiate uneven terrains. Upkies are designed to be buildable at home using only tools and components ordered online, like mjbots actuators. You can develop in Python or C++, on Linux or macOS, then deploy your software to the robot's Raspberry Pi.
Hobby CAD, CNC machining, and resin casting (2015)
(coredump.cx)
I'm a computer geek by day, and an occasional hobbyist robot builder by night. For most, the craft of robotics requires either deep pockets, or a combination of outstanding manual skills and easy access to a top-notch machine shop. Because of this, many urban-dwelling enthusiasts tend to give up, resort to expensive and limiting premade kits, or fall back to junkyard-quality engineering.
I'm a computer geek by day, and an occasional hobbyist robot builder by night. For most, the craft of robotics requires either deep pockets, or a combination of outstanding manual skills and easy access to a top-notch machine shop. Because of this, many urban-dwelling enthusiasts tend to give up, resort to expensive and limiting premade kits, or fall back to junkyard-quality engineering.
Robot Dog and Leafblower = Labor-Free Yardwork
(core77.com)
Redditor Enginerdz came up with a creative use for one of his robot dogs (he has four): Yardwork.
Redditor Enginerdz came up with a creative use for one of his robot dogs (he has four): Yardwork.
Show HN: I built an app to use a QR code as my doorbell
(dingdongdoorbell.com)
Ding Dong Doorbell offers a versatile digital doorbell for every entrance.
Ding Dong Doorbell offers a versatile digital doorbell for every entrance.
Hacking the T2S+ Out of Fear: Get Lock-In Thermography for Free
(dmytroengineering.com)
By now you have probably seen the sea of cheap Chinese thermal cameras meant to plug into your phone that have flooded the market, and quite quickly out-competed stuff like the FLIR smartphone plugins.
By now you have probably seen the sea of cheap Chinese thermal cameras meant to plug into your phone that have flooded the market, and quite quickly out-competed stuff like the FLIR smartphone plugins.
Show HN: Satoshi9000 analog BTC key generator (mechanical)
(ycombinator.com)
I built this machine so I could generate Bitcoin keys that I could trust. Air-gapped and simple to use and understand (mechanical).<p>The Satoshi 9000 demo: https://youtu.be/bJiOia5PoGE<p>The key value proposition of the machine is that it generates analog randomness in the physical world and converts it into digital (1’s and 0’s) randomness. Seamlessly.
I built this machine so I could generate Bitcoin keys that I could trust. Air-gapped and simple to use and understand (mechanical).<p>The Satoshi 9000 demo: https://youtu.be/bJiOia5PoGE<p>The key value proposition of the machine is that it generates analog randomness in the physical world and converts it into digital (1’s and 0’s) randomness. Seamlessly.
Show HN: I designed a PCB MIDI saxophone
(github.com/Whackalenso)
The Circuit Sax is a saxophone MIDI controller.
The Circuit Sax is a saxophone MIDI controller.
Using Euro coins as weights (2004)
(rubinghscience.org)
Here is a cheap way to obtain a set of standard weights, for measuring weights up to about 100 gram, to an accuracy of about 0.5 gram : Use the coins of the currency of your country. Thus one can make use of the fact that these coins are fabricated in mass production, and because of that have not only a constant shape and size, but also a constant and accurately fixed weight.
Here is a cheap way to obtain a set of standard weights, for measuring weights up to about 100 gram, to an accuracy of about 0.5 gram : Use the coins of the currency of your country. Thus one can make use of the fact that these coins are fabricated in mass production, and because of that have not only a constant shape and size, but also a constant and accurately fixed weight.
555 Timer Circuits
(555-timer-circuits.com)
555 Timers are fun and a great way to start learning electronics
555 Timers are fun and a great way to start learning electronics
A Simple open-source Phone programmable with Arduino
(wiphone.io)
The WiPhone is a hackable, modular mobile phone which makes HD voice calls for free over WiFi.
The WiPhone is a hackable, modular mobile phone which makes HD voice calls for free over WiFi.
Ask HN: How do you organize your electronic components?
(ycombinator.com)
Capacitors, resistors, micro-controllers, oh my!... god it's a mess. I keep finding spare parts between my toes and under pillows. "Open-Air Desk-top" storage is no longer an option.<p>What types of storage do you use? Are you subscribed to an organizational philosophy? Do you sort your resistors by resistance?<p>Please and thank you ~
Capacitors, resistors, micro-controllers, oh my!... god it's a mess. I keep finding spare parts between my toes and under pillows. "Open-Air Desk-top" storage is no longer an option.<p>What types of storage do you use? Are you subscribed to an organizational philosophy? Do you sort your resistors by resistance?<p>Please and thank you ~
CapibaraZero: A cheap alternative to FlipperZero based on ESP32-S3
(capibarazero.github.io)
A cheap alternative to FlipperZero™ based on Espressif boards
A cheap alternative to FlipperZero™ based on Espressif boards
Mothbox 4.0
(digital-naturalism-laboratories.github.io)
The Mothbox is a low-cost, high-performance insect monitor. It features a power efficient and lightweight design meant to help field biologists deploy it in the depths of the jungles, and its low-cost nature means you can build one to study the biodiversity at your home!
The Mothbox is a low-cost, high-performance insect monitor. It features a power efficient and lightweight design meant to help field biologists deploy it in the depths of the jungles, and its low-cost nature means you can build one to study the biodiversity at your home!