Homemade Triple Monitor Mount Looks Professionally Made

Professional Monitor Mount

Reddit user [popson] just finished off this impressive monitor mount build. Designed completely in Sketchup, it’s adjustable and will fit monitors from 20″ to 27″.

While designing it they stuck with standard material sizes, and it makes use of a lot of cold rolled steel — box tube, angle, and tube. Wide aluminum channel provides the adjust-ability for various monitor sizes, and standard VESA monitor mounting brackets guarantee monitors will fit.

sketchup model of monitor mount

There’s a lot of welding involved, but like [popson] says, he’s no pro — it’s not that hard to do. Once everything was done, they painted it glossy black to protect it from rusting.

The adjustment knobs are even home-made, cut from a wooden plank using a hole saw, sanded, and varnished.

 

He’s even added RGB LED light strips onto each of the monitors for a fully immersed gaming experience.

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Rapid Fire Mod For A Wireless Mouse

Rapid Fire Wireless Mouse

Sometimes changing your computer mouse can be uncomfortable for a while until you get used to the replacement. It may also take some time to get used to new features or the lack of features the new mouse has. [Jon] bought an awesome wireless mouse that he really likes but it is missing one critical feature: rapid fire for gaming. He previously modded his old wired mouse to have a rapid fire button using a 555 timer. That worked fine as the mouse ran off the USB’s 5 volts, and that’s the voltage the 555 timer needed. The new wireless mouse has a 1.5 volt battery and can not support the 555 timer. What’s a gamer to do?

[Jon] searched around the ‘net but could not find any wireless rapid fire mods. Eventually, he did find a low-voltage variation called the LMC555 and ordered a few for his project. The new wireless mouse was taken apart in order to find out how the mouse buttons work. In this case, the signal pin is pulled low when the mouse button is pushed. Now that it is known how the mouse button works, just a couple of resistors, a capacitor, an NPN transistor and a push button switch are all that are necessary to finish up this mod. When the push button is pressed, the LMC555 timer activates the transistor in order to ground the mouse button signal pin. This happens to the tune of 1236 times a minute! That is a lot of rapid firing.

The few components were soldered up neatly and packed into the limited spare area inside the mouse. A hole drilled in the side of the mouse’s housing holds the new rapid fire push button in an ergonomically pleasing location.

Earlier, we mentioned [Jon] has done this mod before on a wired mouse. He learned about that project here on Hackaday. Check it out if your wired mouse is craving a rapid fire button.

Video after the break…

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Playing DOOM on an ATM

There aren’t too many details available about this hack, but we still thought it was interesting enough to share. YouTube user [Aussie50] seems to have figured out a way to install DOOM on an automated teller machine (ATM). Not only is the system running the software, it also appears that they are using the ATM’s built-in buttons to control the action in-game.

Many ATM’s today are simply computers that run a version of Windows, so one would assume it shouldn’t be too difficult to get an older game like DOOM running on the hardware. Towards the beginning of the video, you can quickly get a glimpse of what appears to be a default Windows XP background screen. You can see later in the video that [Aussie50] drops to what appears to be an MS-DOS command line. It stands to reason then that this particular model of ATM does run on Windows XP, but that [Aussie50] may have had to install MS-DOS emulation software such as DOSBOX as well.

At one point in the video, the camera man mentions they are using an I-PAC2. Some research will show you that this little PCB is designed to do USB keyboard emulation for arcade games. It looks like you can just hook up some simple momentary switches and the I-PAC2 will translate that into USB keyboard commands. It is therefore likely that [Aussie50] has hooked up the ATM’s buttons directly to this I-PAC2 board and bypassed the original button controller circuit altogether.

It is also mentioned in the video that [Aussie50] was able to get the receipt printer working. It would be interesting to somehow incorporate this into the DOOM game. Imagine receiving a receipt with your high score printed on it. This also gets us thinking about other possibilities of gaming on ATM hardware. Can you configure the game to require a deposit before being able to play? Can you configure it to dispense cash if you beat the high score? What if you modified the multiplayer deathmatch mode so all players must pay an entry fee and the winner takes all? What creative ideas can you come up with for gaming on ATM hardware? Continue reading “Playing DOOM on an ATM”

Bil Herd: Computing with Analog

When I was young the first “computer” I ever owned was an analog computer built from a kit. It had a sloped plastic case which had three knobs with large numerical scales around them and a small center-null meter. To operate it I would dial in two numbers as indicated by the scales and then adjust the “answer” by rotating the third dial until the little meter centered. Underneath there was a small handful of components wired on a terminal strip including two or three transistors.

Science Fair Analog Computer
Science Fair Analog Computer

In thinking back about that relic from the early 1970’s there was a moment when I assumed they may have been using the transistors as logarithmic amplifiers meaning that it was able to multiply electronically. After a few minutes of thought I came to the conclusion that it was probably much simpler and was most likely a Wheatstone Bridge. That doesn’t mean it couldn’t multiply, it was probably the printed scales that were logarithmic, much like a slide rule.

Analog slide rule on digital calculator
Old meets new: Analog and digital computation

Did someone just ask what a slide rule was? Let me explain further for anyone under 50. If you watch the video footage or movies about the Apollo Space Program you won’t see any anyone carrying a hand calculator, they didn’t exist yet. Yet the navigation guys in the first row of Mission Control known aptly as “the trench”, could quickly calculate a position or vector to within a couple of decimal places, and they did it using sliding piece of bamboo or aluminum with numbers printed on them.

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MARCH attends HOPE X in July

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The Mid-Atlantic Retro Computing Hobbyist (MARCH) group is at HOPE X displaying a chronology of Apple computers, everything from an accurate Apple 1 reproduction all the way way up to an Apple Macintosh, and of course including all the II’s in between. Although they are only displaying Apples at this event, don’t confuse them for an Apple group. They love all types of vintage computers from the 1940’s to the 80’s.

[Evan], president of the group, elegantly explained why they are here; “to let people know that vintage computing is a thing and there are people in the area that do that thing”. He would like to encourage everyone who is mildly interested in retro computing to contact their local retro computer group and get involved in the community.

The group also puts on a yearly Vintage Computer Festival in New Jersey. This year’s event has already passed but you can still see what happened as Hackaday was there documenting all the cool stuff.

Mid Atlantic Retro Computing Group

HOPE X: Commodore 64’s Are Back, Baby

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Maybe they weren’t really ever gone but even so Commodore enthusiast [ALWYZ] is here at HOPE X spreading re-awareness of the Commodore 64 and that there is still a community of Commodore fans out there who have been up to some pretty cool projects.

One of those projects is a Quantum Link-esque service called Q-Link Reloaded. Quantum Link was an online service available for Commodore 64 and 128 users that offered electronic mail, online chat, file sharing, online news, and instant messaging. It lasted from the mid-80s to the mid-90’s and later evolved into America Online. In 2005, a group of folks reversed-engineered the original server code and the resultant Q-Link Reloaded lets the Commodore folks once again communicate with each other.

Also on display is a Raspberry Pi running a C64 emulator complete with a controller to GPIO adapter. Hackaday has covered this emulator just a few months ago and it is great to see it working in person.

C64 emulator on raspberry pi

 

Embedding Wireless Charging into Your Laptop

Wireless charger in chromebook

Looking for a project to do [Jason Clark] thought it might be fun to integrate a spare wireless Qi charger into his HP Chromebook 14.

He started by cracking open the Qi charger — it’s held together by adhesive and four phillips screws hiding under the feet pads — all in all, not that difficult to do. Once the plastic is off, the circuit and coil are actually quite small making it an ideal choice for hacking into various things. We’ve seen them stuffed into Nook’s, a heart, salvaged for a phone hack…

Anyway, the next step was opening up the Chromebook. The Qi charger requires 5V at 2A to work, which luckily, is the USB 3.0 spec — of which he has two ports in the Chromebook. He identified the 5V supply on the board and soldered in the wires directly —  Let there be power!

While the coil and board are fairly small, there’s not that much space underneath the Chromebook’s skin, so [Jason] lengthened the coil wires and located it separately, just below the keyboard. He closed everything up, crossed his fingers and turned the power on. Success!

It’d be cool to do something similar with an RFID reader — then you could have your laptop locked unless you have your RFID ring with you!