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 2018-04-23 08:00 

Hackaday

The Simplest Possible DIY Ultrasonic Levitator...

We thought that making things levitate in mid-air by the power of sound was a little bit more like magic, or at least required fancy equipment. It turns out that you can do it yourself easily enough w......

 2018-04-23 05:00 

Hackaday

Remote Control of Clocks is Easy as Pi...

[Fatjedi007] recently acquired three programmable boxing gym-type clocks to help his developmentally disabled clients manage their time. The plan was to have timers of varying lengths fire at preset t......

 2018-04-23 02:00 

Hackaday

An FM Transceiver From An Unexpected Chip...

The Si47xx series of integrated circuits from Silicon Labs is a fascinating series of consumer broadcast radio products, chips that apply SDR technologies to deliver a range of functions that were onc......

 2018-04-22 23:00 

Hackaday

Hackaday Links: April 22, 2018...

Eagle 9 is out. Autodesk is really ramping up the updates to Eagle, so much so it's becoming annoying. What are the cool bits this time? Busses have been improved, which is great because I've rarely ......

 2018-04-22 20:00 

Hackaday

Counting Without Transistors...

The Hackaday Prize is all about Building Hope. We want to see hardware creators change the world with microcontrollers and breadboards. That's a noble goal, but it also doesn't mean you can't have fun......

 2018-04-22 17:00 

Hackaday

Fail of the Week: The Spot Welder Upgrade That Wasn't...

Even when you build something really, really nice, there's always room for improvement, right? As it turns out for this attempted upgrade to a DIY spot welder, not so much.You'll no doubt recall ......

 2018-04-22 14:00 

Hackaday

When Detecting Lines Is Harder Than Expected...

[Conor Patrick] is no stranger to hardware development, and he's had an interesting project for the past few months. He's attempting to create a tool to convert images of technical drawings (such as f......

 2018-04-22 11:00 

Hackaday

GuerillaClock Could Save This City Thousands...

They say necessity is the mother of invention. But if the thing you need has already been invented but is extremely expensive, another mother of invention might be budget overruns. That was the case w......

 2018-04-22 08:00 

Hackaday

Blueprints Make It Easy To Make (Some) Alexa Skills...

If you can code, you can create an Alexa skill -- the programs that allow an Amazon Echo or similar device interact with you. What if you can't code or you are just too lazy to do all the setup? Amazo......

 2018-04-22 05:00 

Hackaday

Computers May Someday Need A Drink...
 2018-04-22 02:00 

Hackaday

3D Drone Video...

If you enjoy flying quadcopters, it is a good bet that you'll have a drone with a camera. It used to be enough to record a video for later viewing, but these days you really want to see a live stream.......

 2018-04-21 23:00 

Hackaday

Got a Burning Idea For An EMF Camp Presentation? Now's Your Chance!...

Sometimes the world of tech conference presentations can seem impossibly opaque, a place in which there appears to be an untouchable upper echelon of the same speakers who pop up at conference after c......

 2018-04-21 20:00 

Hackaday

Roomba-Riding Beer Butlers Will Serve Us All...

[Josh] isn't one to refuse a challenge, especially when robots are involved. The latest dare from friends and family? Build a beer robot that can bring beverages at everyone's beck and call.The buil......

 2018-04-21 17:00 

Hackaday

Tracktorino Shields You From Poor Interfaces...

On-screen controls in a digital audio workstation expand the power of a DJ or musician, but they are not intuitive for everyone. The tactility of buttons, knobs, sliders and real-world controls feels ......

 2018-04-21 14:00 

Hackaday

Building a POV Display On A PC Fan...

We've covered plenty of persistence of vision (POV) displays before, but this one from [Vadim] is rather fun: it's built on top of a PC fan. He's participating in a robot building competition soon an......

 2018-04-21 11:00 

Hackaday

Nerf blaster goes next-level with propane power...

There are no shortage of Nerf gun mods out there. From simply upgrading springs to removing air restrictors, the temptation of one-upping your opponents in a Nerf war speaks to many!Not conten......

 2018-04-21 08:00 

Hackaday

Fast LED Matrix Graphics For The ESP32...

Many of you will have experimented with driving displays from your microcontroller projects, and for most people that will mean pretty simple status information for which you'd use standard libraries ......

 2018-04-21 05:00 

Hackaday

Home Made 5-Axis CNC Head Is A Project To Watch...

[Reiner Schmidt] was tired of renting an expensive 5-axis CNC head for projects, so he decided to build his own. It's still a work in progress, but he's made remarkable progress so far. The project i......

 2018-04-21 02:00 

Hackaday

Zippo Keeps Your Bits Safe...

[Laura Kampf] found a new use for an old Zippo lighter by turning it into a carrier for her screwdriver bits. There are several multitools out there which can accept standard screwdriver bits. The pro......

 2018-04-20 23:00 

Hackaday

Real-Time Polarimetric Imager from 1980s Tech...

It's easy to dismiss decades old electronics as effectively e-waste. With the rapid advancements and plummeting prices of modern technology, most old hardware is little more than a historical curiosit......

 2018-04-20 20:00 

Hackaday

A Polar Coordinate CNC Plotter Even Descartes Could Love...

Take apart a few old DVD drives, stitch them together with cable ties, add a pen and paper, and you've got a simple CNC plotter. They're quick and easy projects that are fun, but they do tend to be a......

 2018-04-20 18:30 

Hackaday

This Is Your Last Chance To Design The Greatest In Open Hardware...

This is the last weekend to get in on the Open Hardware Design Challenge, the first challenge of the 2018 Hackaday Prize. We're looking for the boldest idea you can come up with. We want to see the be......

 2018-04-20 17:01 

Hackaday

eTextile Spring Break Tackles Signal Blocking, Audio Generation, and Radio Transmissions...

Finding a killer application for e-textiles is the realm of the hacker and within that realm, anything goes. Whether it's protecting your digital privacy with signal shielding, generating audio with a......

 2018-04-20 15:30 

Hackaday

Laser projector ditches galvanometer for spinning drum...

Laser projectors like those popular in clubs or laser shows often use mirror galvanometers to reflect the laser and draw in 2D. Without galvos, and on a tight budget, [Vitaliy Mosesov] decided that in......

 2018-04-20 14:00 

Hackaday

Life On Contract: Lowering Your Cost without Dropping Your Price...

Last time in Life on Contract, I discussed ways to figure out a starting point on how much to charge for your services. However, sometimes you and a client may wish to work together but for some reas......

 2018-04-20 11:00 

Hackaday

This Vapour Deposition Chamber Isn't Vapourware...

If you are an astronomer with an optical reflecting telescope, the quality of your mirror is one of your most significant concerns. Large observatories will therefore often have on-site vapour deposit......

 2018-04-20 08:00 

Hackaday

Tesla Coil Uses Vacuum Tube...

What do you do when you find a 5 kW transmitting tube in your local electronics store? If you are [TannerTech], you build a vacuum tube tesla coil. This isn't the usual little wimpy coil, but a big ba......

 2018-04-20 05:00 

Hackaday

Turning 8-Track Player Into A Walkman...

Following time backward, for portable music we've had iPods, CDs, and cassette tapes which we played using small Walkmans around the size of a cigarette box. And for a brief time before that, in the......

 2018-04-20 02:00 

Hackaday

Play Chess Against A Ghost...

While chess had long been a domain where humans were superior to computers, the balance has shifted quite substantially in the computers' favor. But the one thing that humans still have control over i......

 2018-04-19 23:00 

Hackaday

Marquee Display Uses Six Dozen Surplus VFD Tubes to Great Effect...

The quest to repurpose surplus parts into new and interesting displays never ends, it seems. And the bigger the display, the better, with extra points for using some really obscure part, like these su......

 2018-04-19 20:00 

Hackaday

Arduino Revives Junkyard Laser Cutter...

Some people have all the luck. [MakerMan] writes in to gloat tell us about a recent trip to the junkyard where he scored a rather serious looking laser cutter. This is no desktop-sized K40 we're talki......

 2018-04-19 18:30 

Hackaday

Bent PETG Fills A Nixie Gap...

Have you ever thought that Nixie tubes are cool but too hard to control with modern electronics? And that they're just too expensive? [david.reid] apparently thought so and decided to create his own v......

 2018-04-19 17:01 

Hackaday

When 4 + 1 Equals 8: An Advanced Take On Pointers In C...

In our first part on pointers, we covered the basics and common pitfalls of pointers in C. If we had to break it down into one sentence, the main principle of pointers is that they are simply data typ......

 2018-04-19 15:30 

Hackaday

Completely Scratch-Built Electronic Speed Controller...

Driving a brushless motor requires a particular sequence. For the best result, you need to close the loop so your circuit can apply the right sequence at the right time. You can figure out the timing ......

 2018-04-19 14:01 

Hackaday

Mechanisms: Velcro...

As a species, we've done a pretty good job at inventing some useful devices. But as clever as we think we are, given sufficient time, natural selection will beat us at our game at almost every turn. S......

 2018-04-19 11:00 

Hackaday

Unlock & Talk: Open Source Bootloader & Modem...

During the early years of cell phones, lifespan was mainly limited by hardware (buttons wearing out, dropping phones, or water damage), software is a primary reason that phones are replaced today. Up......

 2018-04-19 08:00 

Hackaday

Raspberry Pi W Antenna Analysis Reveals Clever Design...

The old maxim is that if you pay peanuts, you get a monkey. That's no longer true, though: devices like the Raspberry Pi W have shown that a $10 device can be remarkably powerful if it is well designe......

 2018-04-19 05:00 

Hackaday

Browsing Modern Day BBS on the Epson PX-8 Laptop...

As you read this, there are still people chatting away on Bulletin Board Systems all over the world. Running on newly written software and without the need to actually use a dial-up modem, these (slig......

 2018-04-19 02:00 

Hackaday

SDR IF Experiments...

The R820T tuner IC is used in the popular Airspy software defined radio (SDR) as well as many of the inexpensive RTL SDR dongles. [TLeconte] did some experiments on intermediate frequency (IF) config......

 2018-04-18 23:00 

Hackaday

Classic American Dial Phone Gets A GSM Makeover...

For sturdy utilitarianism, there were few designs better than the Western Electric Model 500 desk phone. The 500 did one thing and did it well, and remained essentially unchanged from the mid-1940s un......

 2018-04-18 20:00 

Hackaday

The One-Transistor Flip-Flop...

A flip-flop is one of the most basic digital electronic circuits. It can most easily be built from just two transistors, although they can and have been built out of vacuum tubes, NAND and NOR gates,......

 2018-04-18 18:31 

Hackaday

Tesselated Worklights Are Nifty, Modular...

Electric lighting - is there anything it can't do? Coming in all manner of forms and flavours, you can get everything from a compact reading lamp to a blindingly powerful worklight for your garage. Ge......

 2018-04-18 17:01 

Hackaday

When Hackerspace Directors Burn Out...

A friend of mine once suggested that there should be a support group for burned-out former hackerspace directors. We could have our own Village of the Damned at summer camps, where we'd sit moodily in......

 2018-04-18 16:30 

Hackaday

Friday Hack Chat: Circuit Board Art...

We are now in a golden age of printed circuit boards. It wasn't too long ago that making your own circuit boards either involved a lot of money, or slightly less money and using some proprietary gar......

 2018-04-18 15:00 

Hackaday

Fire. Vortex. Cannon. Need We Say More?...

Tornadoes are a rightfully feared natural disaster. Fire tornadoes are an especially odious event to contend with -- on top of whatever else is burning. But, a fire vortex cannon? That's some awesome ......

 2018-04-18 14:01 

Hackaday

Fix Your Insecure Amazon Fire TV Stick...

I recently spent a largely sleepless night at a hotel, and out of equal parts curiosity and boredom, decided to kill some time scanning the guest network to see what my fellow travelers might be up to......

 2018-04-18 11:00 

Hackaday

This Thermal Printer has Serious Game...

[Dhole], like the fox, isn't the first to connect his computer to a Game Boy printer but he has done a remarkable job of documenting the process so well that anyone can follow. The operation is descri......

 2018-04-18 08:00 

Hackaday

Dispensing Solder Paste Automatically...

Through-hole chips are slowly falling by the wayside, and if you want to build something with new parts you will be using surface mount components. This means spreading paste and throwing it in the to......

 2018-04-18 05:00 

Hackaday

Keeping Streets Ice-Free with the Raspberry Pi...

[Revanth Kailashnath] writes in to tell us about an interesting project he and his team have been working on for their...

 2018-04-18 02:00 

Hackaday

DIY Magnetic Actuator, Illustrated And Demonstrated...

Electromagnetic actuators exert small amounts of force, but are simple and definitely have their niche. [SeanHodgins] took a design that's common in flip-dot displays as well as the lightweight RC ai......

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