DIY Bookshelf is More Than Meets The Eye

It might surprise you, Dear Reader, that not every project featured on Hackaday needs to pulsate with LEDs, or update the world about its goings-on over Twitter. They don’t even, contrary to what you may have heard, need to have an Arduino inside. No, sometimes you can pull off a pretty neat hack with nothing more than some wood, a couple of tools, and a unique idea which repurposes something that would otherwise be in a landfill.

Such is the case with the latest project from [Keith Decent], which uses plywood and the spines of old books to create a secret compartment “bookshelf”. The concept is probably best described as a roll-top desk on its side, and while the action does appear a little stiff, it scores extra points for how easy it looks to replicate.

Using a router, [Keith] cuts a channel into the top and bottom sheets of plywood, which the “books” will eventually ride in. This channel goes around the entire perimeter of the shelf, and it’s important to make it as straight as possible so nothing binds up. To make sure things move through as smoothly as possible, some sandpaper is used to clean-up the inside edges.

The next step is to rip some books apart and salvage their spines. Used books can be purchased for next to nothing at flea markets, so even if you don’t have a home library filled with vintage tomes to eviscerate, it should be easy enough to get your hands on some if you want to build your own version. For sanity’s sake it would seem that books with the same size spines are ideal, so keep an eye out for old sets of encyclopedias and the like.

When the spines are removed from the books, they get glued to individual wooden slats. These slats then have holes drilled in the top and bottom, and standard wood screws driven in to act as “rollers”. Real rollers would undoubtedly make for smoother action, but you can’t beat his method if you’re trying to get it done cheaply and quickly.

The slats are then glued onto a piece of fabric, creating what is referred to as a tambour. The fabric backing links all the slats together and makes it so that pushing and pulling one slat will move them all together as one. The book spine tambour is then inserted in the routed channel, and the back panel of the shelf can be installed to lock it all together.

At this point the project is essentially done, but [Keith] does take it the extra mile by sealing all the book spines and doing some finish work on the shelf to make it look more like a real vintage piece of furniture instead of some scrap plywood screwed together.

If this exercise in woodworking has gotten you interested in the wonderful world of dead trees, you’re in luck. We’ve covered several woodworking projects from the hacker perspective, so you won’t be completely lost.

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Becoming Your Own ISP, Just for Fun

When moving into a new house, it’s important to arrange for the connection of basic utilities. Electricity, water, and gas are simple enough, and then it’s generally fairly easy to set up a connection to an ISP for your internet connection. A router plugs into a phone line, or maybe a fiber connection and lovely packets start flowing out of the wall. But if you’re connected to the internet through an ISP, how is the ISP connected? [Kenneth] answers this in the form of an amusing tale.

It was during the purchase of data centre rack space that [Kenneth]’s challenge was laid down by a friend. Rather then simply rely on the connection provided by the data centre, they would instead rely on forging their own connection to the ‘net, essentially becoming their own Internet Service Provider.

This is known as creating an Autonomous System. To do this involves several challenges, the first of which is understanding just how things work at this level of networking. [Kenneth] explains the vagaries of the Border Gateway Protocol, and why its neccessary to secure your own address space. There’s also an amusing discussion on the routing hardware required for such a feat and why [Kenneth]’s setup may fall over within the next two years or so.

It’s not for the faint hearted, and takes a fair bit of paperwork, but [Kenneth] has provided an excellent guide to the process if you really, really just need to own your own corner of the internet. That said, there are other networking tricks to cut your teeth on if you’d like a simpler challenge, like tunneling IP over ICMP.

 

Milling PCBs With An Off-The-Shelf CNC

There’s a lot of little things that can go wrong before you get great results out of a process. We like to read build logs to learn from the mistakes made. [Marc Liyanage] bought a Nomad CNC machine from Carbide3d, and after a bit of learning has gotten some very nice PCBs out of it.

The first trip up he encountered was not setting the design rules in EagleCAD to check for gaps too small for his router bit. After he sorted that, and worked around an issue with Carbide not supporting R values for curves; instead opting for IJK, he made a nice TQFP to DIP break out board.

The next board was a more complicated double-sided job. He cleverly had the machine drill two holes all the way through the PCB to give him a space for two alignment pins. Unfortunately this didn’t work out exactly as planned and he had a slight misalignment with some of the via holes. It looked alright and he began assembling. To his dismay, the clearances were off again. It was a bit of deja vu for us.

We’ve made lots of boards on a CNC machine, and can attest to the task’s finicky nature. It’s certainly quicker than the photoresist technique for boards with lots of little holes. It will take someone quite a few tries before they start having more successes than failures, but it’s very rewarding.

Next generation Arduino manufacturing problems?

[The Moogle] just got his new Arduino Uno; wow, that was fast. What should have been a happy unboxing turned sour when he took a close look at the board. It seems that it exhibits several examples of sloppy fabrication. The the lower-left image shows unclean board routing, a discolored edge, and a sharp tooth sticking out from the corner. The shield header shown in the upper left is not flush with the board, resulting in a weaker physical union and a crooked connection. There are vias that look like they’re not be centered in the solder mask, and areas where raw copper is exposed.

It saddens us to see this because the original Arduino boards were so well manufactured. Keep in mind that this may be an isolated case, and as of yet the company hasn’t been given the chance to swap out the board for one that has passed a more rigorous quality control inspection. But if you’ve already ordered one of your own, take a close look and make sure you’re satisfied with it upon arrival.

Not sure what we mean by next generation Arduino? Take a look at the new hardware that was recently unveiled.

Update: Here’s a direct response from the Arduino blog.

Update #2: [Massimo Banzi], one of the founders of Arduino, took the time to comment on this post. It details the organization’s willingness to remedy situations like [The Moogle] encountered and also links to the recent Arduino blog post.

Hackaday Links: Sunday, November 29

Sometimes we wonder if we’re making good choices with PCB layout when using EagleCAD. Watch how the pros do it with a video of an hour-long Adafruit PCB layout session compressed into seven minutes.

[Elijah] documented his RepStrap build. This is a chicken-or-egg project in that RepStrap machines are built without the assistance of an already existing RepRap.

Here’s an ASUS concept from CeBIT this year for a laptop that has two touch screens and no physical keyboard. Isn’t this just the DS project we saw this week but in a nice case?

[James] conjured up a physical realization of the Spinning Wheel of Death for an art exhibit. We can’t stop smiling when looking at this artful hack.

I’m sure nobody will raise an eyebrow when you pop out that roll of duct-tape and affix your phone to the airplane window. That’s what [floe] did to make this airline flight time-lapse video with an Android phone. Aren’t you supposed to turn off all electronics for takeoff?