Category Archives: Skills

Automate Your Life with Node-RED (Plus a Dash of MQTT)

For years we’ve seen a trickle of really interesting home automation projects that use the Node-RED package. Each time, the hackers behind these projects have raved about Node-RED and now I’ve joined those ranks as well.

This graphic-based coding platform lets you quickly put together useful operations and graphic user …read more

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Posted in Hackaday Columns, home automation, how-to, node-red, node.js, Nodejs, Skills, Software Development, tutorial, web app, webapp | Leave a comment

A Vintage Phone In 2020

When we make a telephone call in 2020 it is most likely to be made using a smartphone over a cellular or IP-based connection rather than a traditional instrument on a pair of copper wires to an exchange. As we move inexorably towards a wireless world in which the telephone …read more

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Posted in dial phone, GPO-746, Original Art, phone, phone hacks, pulse dial, Skills, Tech Hacks | Leave a comment

Linux Fu: Leaning Down with exec

Shell scripting is handy and with a shell like bash it is very capable, too. However, shell scripting isn’t always very efficient. Think about it. If you run grep or tr or sort to do some operation in a shell script, you are spawning a whole new process. That takes …read more

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Posted in bash, exec, Hackaday Columns, linux, Linux Fu, linux hacks, shell scripting, Skills | Leave a comment

Linux Fu: Stupid SSH Tricks

If you connect to remote computers over the Internet, it is a pretty good chance you use some form of SSH or secure shell. On Linux or Unix you’ll use the ssh command. Same goes for Linux-like environments on Windows like Cygwin or WSL. For native Windows, you might be …read more

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Posted in Hackaday Columns, linux, linux hacks, Skills, ssh | Leave a comment

Angela Sheehan is Developing Wearable Tech with Whimsy

As a concept, wearable technology excites many of us, but in practice, it’s been hard to nail down. Up to this point, the most high-tech thing the average person might reasonably wear has been a wrist watch. Devices like Google Glass tried to push the state-of-the-art, but it arguably raised …read more

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Posted in 2019 Hackaday Superconference, cons, led hacks, RGB LED, Skills, wearable hacks, Wearables | Leave a comment

Linux Fu: Debugging Bash Scripts

A recent post about debugging constructs surprised me. There were quite a few comments about how you didn’t need a debugger, as long as you had printf. For that matter, we’ve all debugged systems where you had nothing but an LED to flash or otherwise turn on to communicate …read more

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Posted in bash, bashdb, debugging, Hackaday Columns, Linux Fu, linux hacks, shell script, Skills | Leave a comment

Tales from the Sysadmin: Dumped into the Grub Command Line

Today I have a tale of mystery, of horror, and of hope. The allure of a newer kernel and packages was too much to resist, so I found myself upgrading to Fedora 30. All the packages had downloaded, all that was left was to let DNF reboot the machine and …read more

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Posted in grub, Hackaday Columns, linux, linux hacks, Original Art, Skills, Tales from the Sysadmin, Tech Noir | Leave a comment

Training Bats in the Random Forest with the Confusion Matrix

When exploring the realm of Machine Learning, it’s always nice to have some real and interesting data to work with. That’s where the bats come in – they’re fascinating animals that emit very particular ultrasonic calls that can be recorded and analysed with computer software to get a fairly good …read more

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Posted in bats, Bioacoustics, classification, Interest, machine learning, R, Random Forest, Skills, software hacks | Leave a comment

A Newbie Takes the SMD Challenge at Supercon

First-time visitors to Disneyworld often naively think they’re going to “do” the park in three days: one day for the Magic Kingdom, one day for Epcot, and one day for everything else. It’s easy to spot such people, collapsed on a bench or dragging exhausted kids around while trying to …read more

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Posted in 2019 Hackaday Superconference, cons, Hackaday Columns, Skills, smd, soldering, Supercon | Leave a comment

DSP Spreadsheet: IQ Diagrams

In previous installments of DSP Spreadsheet, we’ve looked at generating signals, mixing them, and filtering them. If you start trying to work with DSP, though, you’ll find a topic that always rears its head: IQ signals. It turns out, these aren’t as hard as they appear at first and, as …read more

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Posted in digital signal processing, dsp, Hackaday Columns, I/Q, Skills, spreadsheet | Leave a comment