desk

40 Articles

Raspberry Pi Powered Standing Desk Rises To New Heights

August 18, 2021 by 15 Comments

Like many office workers, [David Kong] found himself the lucky recipient of a motorized sit-stand desk. Also like most office workers with such a desk, he found himself mostly sitting. Reminders on his phone did little to change habits and [David] resolved to automate his desk to rise on a schedule.

the control board for a poppin sit stand desk

Taking off the front panel of the control box required a few screws and [David] was delighted to find some testing pins right on the PCB.By connecting the right pins together, he could simulate any button being pressed. A Toshiba TLP222A solid-state relay made it simple to connect the pins together, the next step was triggering the relay on some sort of timer.

Speaking of timers, the oft-lauded 555 timer was considered. However, the length of time desired wasn’t as well suited for the 555, and the appeal of just tweaking a file to adjust the interval was tempting. Going to the other end of the spectrum, [David] had a Raspberry Pi zero laying around he had been meaning to play with.

After soldering the relay to pin 17 and writing a quick 10 line python script that is executed on startup, [David] had a working solution that could be taped to the underside of the desk, out of sight. Rather than being on a fixed timer, the desk raises every 45 to 60 minutes. The impact on his life has been wonderful, which was the goal of this particular project. It’s been a few months and he hasn’t had to tweak or fix anything. Is a whole 64-bit multicore processor a bit of an overkill for toggling a pin every hour or so? Yes. But we can’t really fault him for reaching for what was already lying around. The results speak for themselves.

Perhaps this would be something you would incorporate when you’re building your own standing desk?

Charger Caddy Shows What 3D Printers Were Meant For

July 30, 2021 by 9 Comments

As computers became more popular in the late 80s and into the 90s, they vastly changed their environments. Of course the technological changes were obvious, but plenty of other things changed to accommodate this new technology as well. For example, furniture started to include design elements to accommodate the desktop computer, with pass-through ports in the back of the desks to facilitate cable management. While these are less common features now there are plenty of desks still have them, this 3D printed design modernizes them in a simple yet revolutionary way.

While these ports may have originally hosted thick VGA cables, parallel printer cables (if they would fit), and other now-obsolete wiring, modern technology uses simpler, smaller solutions. This doesn’t mean that they aren’t any less in need of management, though. This print was designed to hold these smaller wires such as laptop chargers, phone chargers, and other USB cables inside the port. A cap on the top of the print keeps everything hidden until it is lifted by hand, where a cable can be selected and pulled up to the top of the desk.

While it might seem like a simple project at first, the elegance of this solution demonstrates excellent use of design principles and a knack for integrating slightly older design decisions with modern technology. If you have a 3D printer and a cable management port on your desk, the print is available on Thingiverse. Not every project needs a complicated solution to solve a problem, like this automatic solar tracker we recently saw which uses no complicated electronics or algorithms to reliably point itself at the sun.

A Professional-Level Desk In A Dorm

September 13, 2019 by 9 Comments

Heading off to college comes with its own set of challenges. Harder course material, living away from home for the first time, and dealing with roommates are common hurdles to overcome, but an oft-overlooked issue is the poor quality dorm room desks. For a place that a student is expected to spend a majority of their study time, colleges and universities don’t often provide inspiring areas in the dorm rooms for this task. With a few tools and some time, though, anyone suffering in a dorm can have a much better place to work.

This desk build comes to us from reddit user [lucas_talbert] and is noteworthy for using simple tools and materials to transform the standard, boring desk in a way which won’t upset the facilities manager in charge of the dorm furniture. The backer is a piece of plywood which was covered in bamboo flooring. It was screwed into the back of the desk and secured with L-brackets. A piece of 1×4 was attached around the edges to help hide the LED lights and cables as well.

We like this build for its impressive transformation of an otherwise drab dorm room into a place that most of us wouldn’t mind having as our main workstation, even beyond college. It also uses common materials and is easily removable, both of which are perks when living as a student. The one thing it doesn’t have, though, is the ability to exercise when using it.

Fail Of The Week: How Not To Do IoT Security

May 30, 2019 by 68 Comments

There are a lot of bad days at work. Often it’s the last day, especially when it’s unexpected. For the particularly unlucky, the first day on a new job could be a bad day. But the day you find an unknown wireless device attached to the underside of your desk has to rank up there as a bad day, or at least one that raises a lot of serious questions.

As alarming as finding such a device would be, and for as poor as the chain of decisions leading these devices being attached to the workstations of the employees at a mercifully unnamed company, that’s not the story that [Erich Styger] seeks to tell. Rather, this is a lesson in teardown skills – for few among us would not channel the anger of finding something like this is into a constructively destructive teardown – and an investigation into the complete lack of security consideration most IoT devices seem to be fielded with these days.

Most of us would recognize the device as some kind of connected occupancy sensor; the PIR lens being the dead giveaway there. Its location under a single person’s desk makes it pretty clear who’s being monitored.

The teardown revealed that the guts of the sensor included a LoRa module, microcontroller, a humidity/temperature sensor, and oddly for a device apparently designed to stick in one place with magnets, an accelerometer. Gaining access to the inner workings was easy through the UART on the microcontroller, and through the debug connectors and JTAG header on the PCB. Everything was laid out for all to see – no firmware protection, API keys in plain text, and trivially easy to reflash. The potential for low-effort malfeasance by a compromised device designed to live under a desk boggles the mind.

The whole article is worth a read, if only as a lesson in how not to do security on IoT devices. We know that IoT security is hard, but that doesn’t make it optional if you’re deploying out in the big wide world. And there’s probably a lot to learn about properly handling an enterprise rollout too. Spoiler alert: not like this.

Yell At Your Desk To Get Up In The Morning

February 5, 2019 by 4 Comments

Standing desks are great conversation starters in the office – whether you like it or not. How do you know someone’s got a standing desk? Don’t worry, they’ll tell you. Standing desks have their benefits, but for maximum flexibility, many people choose a desk that can raise and lower depending on their needs. [Wassim] had just such a desk, but found pushing the buttons too 20th century for his tastes. Naturally, Google Assistant integration was the key here.

[Wassim] started out intending to capture and then spoof the desk controller’s signals to the motors, before realising it was likely easier to simply spoof button presses instead. This was achieved through a handful of NPN transistors and an Onion Omega2+ microcontroller board. Then it was a simple case of coding the controller to press the various buttons in response to HTTP requests received over WiFi. Google Assistant integration was then handled with IFTTT, though [Wassim] also discusses the possibility of implementing the full Smart Home API.

It’s entertaining to watch [Wassim] issue commands and have the desk slowly rise in response. Of course, there are other approaches, like this sneaky use of PVC to hack the office furniture.

https://medium.com/@wassimchegham/hey-google-set-my-desk-to-standing-mode-b21dcc40d4b5

Motorizing An IKEA SKARSTA Table

January 23, 2019 by 38 Comments

We’ve been told that standing at a desk is good for you, but unless you’re some kind of highly advanced automaton you’re going to have to sit down eventually no matter what all those lifestyle magazines say. That’s where desks like the IKEA SKARSTA come in; they use a crank on the front to raise and lower the desk to whatever height your rapidly aging corporeal form is still capable of maintaining. All the health benefits of a standing desk, without that stinging sense of defeat when you later discover you hate it.

But who wants to turn a crank with their hand in 2019? Certainly not [iLLiac4], who’s spent the last few months working in conjunction with [Martin Mihálek] to add some very impressive features to IKEA’s adjustable table. Replacing the hand crank with a motorized system which can do the raising and lifting was only part of it, the project also includes a slick control panel with a digital display that shows the current table height and even allows the user to set and recall specific positions. The project is still in active development and has a few kinks to work out, but it looks exceptionally promising if you’re looking to get a very capable adjustable desk without breaking the bank.

The heart of the project is a 3D printable device which uses a low-RPM DC gear motor to turn the hex shaft where the crank would normally go. A rotary encoder is linked to the shaft of the motor by way of printed GT2 pulleys and a short length of belt, which gives the system positional information and avoids the complexity of adding limit switches to the table itself.

For controlling the motor the user is given the option between using relays or an H-Bridge PWM driver board, but in either event an Arduino Nano will be running the show. In addition to controlling the motor and reading the output of the rotary encoder, the Arduino also handles the front panel controls. This consists of a TM1637 four digit LED display originally intended for clocks, as well as six momentary contact tactile switches complete with 3D printed caps. The front panel’s simple user interface not only allows for setting and recalling three preset desk heights, but can even be used to perform the calibration routine without having to go in and hack the source code to change minimum and maximum positions.

We’ve seen all manner of hacks and modifications dealing with IKEA products, from a shelving unit converted into a vivarium to a table doing double duty as a cheap plate reverb. Whether you’re looking for meatballs or some hacking inspiration, IKEA seems to be the place to go.

3D Printed Desk Harnesses The Power Of Fusion 360 And McMaster-Carr

January 23, 2018 by 36 Comments

Black pipe furniture is all the rage now, and for good reason — it has a nice industrial aesthetic, it’s sturdy, and the threaded fittings make it a snap to put together. But if you’ve priced out the fittings lately, you know that it’s far from cheap, so being able to 3D-print your own black pipe fittings can make desks and tables a lot more affordable.

Cheapness comes at a price, of course, and [Vladimir Mariano] takes pains to point out that his desk is a light-duty piece that would likely not stand up to heavy use. But since the flange fittings used to connect the plywood top to the legs and as feet would cost about $64 all by themselves from the local home center, printing them made sense. Together with custom pieces to mount stretchers between the legs, the 3D-printed parts made for a decently sturdy base.

But the end product isn’t the main point of the video below. Thanks to the ability to browse the McMaster-Carr catalog from within Fusion 360, [Mariano] was able to seamlessly import the CAD model of a suitable iron flange and quickly modify it to his needs. The power of this feature is hard to overstate; you can literally browse through a catalog of engineered parts and print usable replicas instantly. Sure, it’s not made of metal, but it’s a huge boon to designers to be able to see how the final product would look, especially in the prototyping phase of a project.

Not familiar with McMaster-Carr? It’s an engineer’s online playground, and we covered the ins and outs of doing business with McMaster a while back.

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