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Simulate Climate With An Arduino
There are usually two ways to go about any task: the easy way and the hard way. Sometimes we might not know there are two options, but once we see someone else’s solution we might feel differently....
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Antenna Tuning For GHz Frequencies
Antenna tuning at HF frequencies is something that radio amateurs learn as part of their licence exam, and then hone over their time operating. A few basic instruments and an LC network antenna tuner...
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An All-Iron Battery Isn’t Light, But It’s Cheap
Rechargeable batteries are a technology that has been with us for well over a century, and which is undergoing a huge quantity of research into improved energy density for both mobile and alternative...
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Raspberry Pi Helps Vintage Psion Find its Voice
Ask a hacker to imagine computing in the 1980s, and they might think of the classic 8-bit all-in-one machines from the likes of Commodore and Atari, or perhaps the early PCs and Macs. No matter the...
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Add A Microscope To Your 3D Printer
There are many ways to keep an eye on your 3D printer as it churns out the layers of your print. Most of us take a peek every now and then to ensure we’re not making plastic vermicelli, and some of us...
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3D Printed Fan Filter Takes Cues from Costume Scene
This custom fan filter created by [Kolomanschell] is a clever application of a technique used to create wearable 3D printed “fabrics”, which consist of printed objects embedded into a fine mesh like a...
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Reverse Engineering An Ancient SBC With An Apple ][
We spend a lot of time in our community discussing the many home computers from the 8-bit era, while almost completely ignoring their industrial equivalents. While today a designer of a machine is more...
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Dice Reader Brings Tech to Your Craps Game… Or, Ya Know, D&D
There are truisms about dice that you’ve probably already heard: if you have just one of them it’s called a “die”, opposite faces of each die always add up to seven, and those dots that you’re adding...
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Hackaday Links: August 4, 2019
Is the hacking community facing a HOPEless future? It may well be, if this report from 2600 Magazine is any indication. The biennial “Hackers On Planet Earth” conference is in serious financial...
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L Band Satellite Antennas Revealed
[SignalsEverywhere] has a lot of satellite antennas and he’s willing to show them off — inside and out — in his latest video that you can see below. Using software-defined radio techniques, you can use...
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The Not Quite USB-C Of Nintendo Switch Accessories
Historically gaming consoles are sold at little-to-no profit in order to entice customers with a low up-front price. The real profits roll in afterwards from sales of games and accessories. Seeking a...
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A Tiny Train Departure Board, Just Like The Real Thing
If you travel on the British rail system, you’ll be familiar with the ubiquitous orange dot-matrix departure display boards. At a glance they tell you the expected arrival times of the next few...
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Resin Printers are Now Cheaper, Still Kind of a Hassle
Your run-of-the-mill desktop 3D printer is based on a technology known as Fused Deposition Modeling (FDM), where the machine squirts out layers of hot plastic that stick to each other. But that’s not...
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A SuperCap UPS
If you treat your Pi as a wearable or a tablet, you will already have a battery. If you treat your Pi as a desktop you will already have a plug-in power supply, but how about if you live where mains...
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CB Radio + Arduino = 6 Meter Ham Band
Somehow [hvde] wound up with a CB radio that does AM and SSB on the 11 meter band. The problem was that the radio isn’t legal where he lives. So he decided to change the radio over to work on the 6...
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Clicky Signspinner Works Just Like A Retractable Pen
[u407]’s 3D printed Signspinner was created as a clean/dirty indicator for a dishwasher, and at its heart is a mechanism that works a lot like that of a retractable ballpoint pen. Every click of the...
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Hold 3500 Volts Up To Your Eye
Old military equipment can sometimes be found in places like flea markets and eBay for pennies, often because people don’t always know what they have. While [tsbrownie] knew exactly what he was...
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Sniffed Transformer Puts Wired Doorbell Online
There’s certainly no shortage of “smart” gadgets out there that will provide you with a notification, or even a live audiovisual stream, whenever somebody is at your door. But as we’ve seen countless...
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Expensive Sony Lens Repair Reveals Shims & Shifts
The photographic hire company Lensrentals had a $2k Sony FE 135mm f1.8 GM camera lens returned with a problem: it was having issues focusing. So, they decided to do the obvious thing and take it apart....
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Preserved Lemons On A Hacker’s Budget
“If you wish to make an apple pie from scratch, you must first invent the universe.” [Carl Sagan]. If you wish to make preserved lemons the same way as [Uri Tuchman], you have to start with that...
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