Category Archives: how-to

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

Drill Thrice, Solder Once

If you design printed circuit boards, then you will have also redesigned printed circuit boards. Nobody gets it right the first time, every time. Sometimes you can solder a scrap of 30gauge wire, flip a component 180°, or make a TO-92 transistor do that little pirouette thing where the …read more

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Posted in copper, drill, fr4, ground plane, hole, how-to, pcb, Printed Circuit Board, solder, Tech Hacks, wire wrap | Leave a comment

Tidy Board Rework Uses Flex PCBs, No Wires

PCB rework for the purpose of fixing unfortunate design problems tends to involve certain things: thin wires (probably blue) to taped or glued down components, and maybe some areas of scraped-off soldermask. What are not usually involved are flexible PCBs, but [Paul Bryson] shows us exactly how flex PCBs can …read more

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Posted in flex PCB, how-to, pcb, repair, repair hacks, rework | Leave a comment

Drive A Plasma Ball With An ATV Ignition Coil And A 555

[Discrete Electronics Guy] sends in his short tutorial on building a high voltage power supply from simple things.

The circuit is a classic, but we love the resourcefulness shown. The ignition coil comes from a three wheeler, the primary power supply is a ATX supply from a computer and the …read more

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Posted in 555, high voltage, how-to, ignition coil, plasma bulb | Leave a comment

Network Booting the Pi 4

We’ve talked about PXE booting the Raspberry Pi 3B+, and then looked at the Raspberry Pi 4 as a desktop replacement. But there’s more! The Pi 4 sports a very useful new feature, the flashable bootloader. Just recently a beta version of that bootloader was released that supports PXE  — …read more

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Posted in Hackaday Columns, how-to, Network Hacks, PXE, Raspberry Pi, Raspberry Pi 4 | Leave a comment

Ramen Pen Lets You Doodle with Noodles

Don’t write off your weird ideas — turn them into reality. For years, woodworkers have used pen bodies as a canvas for showing off beautiful wood. But what’s the fun in that? [JPayneWoodworking] made a pen out of Ramen noodles just to see if he could.

The process is pretty …read more

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Posted in epoxy, how-to, misc hacks, pen, pen turning, pressure tank, ramen, send noods | Leave a comment

Peep These Ultra-Real 3D-Printed Eyeballs

For humans, life is in the eyes. Same deal with automatons. The more realistic the eyes, the more lifelike (and potentially disturbing) the automaton is. [lkkalebob] knows this. [lkkalebob] is so dedicated to ocular realism in his ultra-real eyeballs that he’s perfected a way to make the minuscule veins from …read more

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Posted in 3d Printer hacks, animatronic eyes, automaton, how-to, resin casting, silicone casting, thread | Leave a comment

Build Your Own Plasma Ball

The simple plasma ball – it graces science museums and classrooms all around the world. It shares a place with the Van de Graaf generator, with the convenient addition of spectacular plasma rays that grace its spherical surface. High voltage, aesthetically pleasing, mad science tropes – what would make a …read more

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Posted in 2019 Hackaday Prize, Hackaday Prize, high voltage, how-to, plasma, science | Leave a comment

Robotic Laundry Line Reels You In

It may not be a laundry-folding robot, but this robotic launders line build by [Radical Brad Graham] is pretty neat. He has a 75-foot hanging laundry line from his house to a woodshed, and decided to roboticize it using some bits that were lying around. The result is a simple …read more

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Posted in how-to, misc hacks | Leave a comment

How to make a living with Embedded Systems

One of the biggest dreams anyone has is to make a living doing what they love. For all hackers, makers, and DIYers with a passion for embedded systems, it may make sense initially to pursue embedded systems design as a possible career, but without so much information on the types …read more

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Posted in career advice, embedded software engineer, how-to, interview | Leave a comment