How to install OS X Mountain Lion from an external drive

OS X Mountain Lion just popped up in the App Store so I could not resist to download it at work where it takes 30 minutes compared to several hours back home. As with Lion the setup is handled through an installer which one get’s (after appropriate payment obviously) through the App Store. The process to backup the installer or create a external hard drive to install Mountain Lion onto several machines is straight forward and saves valuable time and bandwidth for multiple “Apple Thingy” owners :)


How to backup the installer:

1. Download from the App Store. Current price is under £13.99 which I think is more than fair

2. Once the download finishes don’t go through with the update (<- this would run the upgrade routine and then delete the installer) but cancel the update. The installer will stay on your machine and we can now “process it further” ;)

3. Open Finder and go to your Applications folder

4. Right click on Install OS X Mountain Lion and click on Show package contents

5. Navigate through the folders: Contents, SharedSupport, and find InstallESD.dmg :)

6. Just like with Lion InstallESD.dmg is what you are after and with Disk Utility you can use this image to create a bootable external hard drive or simply transfer it to another machine to install Mountain Lion. There are various tools around which do the above in one click for Lion so if you don’t feel confident to do the above yourself just give it a few hours and the ones for Mountain Lion should start to appear.
No need to try and burn a DVD from the image, I can confirm that it is too large…

I shall now get on and upgrade some of my machines :)

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The Arduino Mega Protoshield Kit – Build Instructions

1. Introduction:
For my new Arduino controlled greenhouse project I lately required a new Arduino Mega Protoshield. I’ve had the nice red Sparkfun one for quite some time now but since I’m using an Arduino Mega 2560 for this project I wanted something that brought up the additional new pins and the ICSP header. The latest original Arduino Mega Protoshield (A000039) was an exact match for my requirements and as a kit available from proto-pic for under £14. How was I meant to resist :)


2. Where’s me instructable:
I’m lazy these days so every new kit I get I open google to look for an instructable. Usually I don’t need the instructions but I have on so many occasions found welcome additional tweaks and project ideas mentioned in said instructables and met so many great people from comments and forum posts that I seems time well spent. Oddly enough, I found nothing for this kit. Worse, I found forum posts asking specifically for this instructable but no valid answers/links.
I get it, this kit isn’t complex so I assume nobody could so far be asked to write this guide, especially since the Arduino Mega isn’t exactly geared towards entry level projects. Still, I’ve decided to take a few pictures while I build and write this post. Even if it’s just to get a few friendly comments or helps to reassure sombody that they are building it as intended it’ll be worth a little bit of my time I think.


3. What’s in the box:
This is what I got with my kit:

  • One Arduino Mega Protoshield Kit
  • Two little push buttons
  • One single row strip of 40 long headers
  • One 18×2 header block
  • Three LEDs (one each of Red, Green and Yellow)
  • Three 220 Ohm Resistors
  • Three 1K Ohm Resistors
  • Three 10K Ohm Resistors
Arduino Mega Protoshield Kit


4. Let’s build:
There is no need to solder the parts in this particular order but this worked for me.

4.1 LEDs and resistors:
Have a look for the corner which is meant to get the two LEDs (look at the top of the shield, if you can read the Arduino logo it’s the top left corner). Fit the two 220Ohm resistors (orientation doesn’t matter with those) and get one red and one green LED. If you look at the bottom side of the shield it’s easy to determine which way round to mount the LEDs. The shorter lead gets connected to ground and it’s easy to see which solder run comes from ground. In other words, the holes closest to the little “1″ are the ones connecting to ground aka the ones for the shorter lead. Solder in place and trim off the surplus leads.

Arduino Mega Protoshield Kit - LEDs 1

Arduino Mega Protoshield Kit - LEDs 2

Arduino Mega Protoshield Kit - LEDs 3


4.2 ICSP header and push button:
If you look at the top of the shield and if you can read the Arduino logo the little push botton goes right next to the logo on the right hand side. The ICSP header then again goes to the right hand side of the push button.

Arduino Mega Protoshield Kit - icsp/button


4.3 Headers:
There is the long row of 18×2 pins for the large pin block on the right hand side of the shield. Once you are done with soldering that one into place snap the long single row of headers into smaller parts to provide the segments required for the groups of pins at the top and bottom edge of the shield. In my case the 18×2 pins were quite a bit shorter than the other header pins so I decided to shorten the pins at the top/bottom.

Arduino Mega Protoshield Kit - headers


5. Conclusion:
It does what I want and I think it does it well. The shield is of very good quality and the design is well thought through, everything seems to be in the right place. The Mega shields tend to be a bit hard to fit onto the actual Arduino Mega literally because of the 1001 pins and especially the giant 18×2 header section. This one isn’t any better or worse than all the other ones I’ve tried. The kit leaves a few spare parts in form of one yellow LED, one push button and a couple of resistors but I’m not entirely sure what they are meant to be good for. I’m open to suggestions :)
The only thing I would critisice, and that’s pure criticism of the kit not the shield itself, it the fact that my kit came with long top/bottom headers but the 18×2 header section consists of pins which are 2/3 of the length at best. Only chance I saw to get all pins inserted was to shorten the top/bottom header pins which works fine but, once mounted onto the Arduino Mega, means there is very little distance between the Arduino Mega and the protoshield which I don’t really like.

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Arduino Project 12.1 – My second Arduino controlled greenhouse


This is the first of a series of posts to describe my second Arduino automated greenhouse. It’s simply too big a project to cover everything in one post so I’ve decided to split it into a few smaller posts. In this first part I’m going to quickly describe my water, power and network setup.


1. Power

I’ve built this greenhouse myself and since I knew I wanted to automate it I fed 240V (armoured 4mm cable) and mains water (blue plastic pipe) in from underneath through the base. The 240V connection feeds two IP54 sockets which I rarely use apart from powering tools during maintenance tasks and a fused spur to supply the IP66 flourescent light fitting and associated IP66 light switch.


2. Water

The blue polypipe connects to a copper adapter which then phases out into two lever taps. One of them is usually connected to a hose reel and the other one is now feeding the automated watering pipeline :) This pipeline runs round the inside bottom of the whole greenhouse with so far five 12V solenoid valves T-ing off of it. I used 13mm irrigation pipe for the water run up to the valves and behind them I’ve gone down to smaller 5mm irrigation pipeline which then feeds several adjustable 30l/h irrigation bubblers. For the bigger plants I use one bubbler per pot while they are still young but once they grow up and develop long enough roots one of them should be enough to water the tray underneath the pots. The trays up on the staging only house smaller pots anyway so they all get flooded by one bubbler each.





3. Network

I’ve pulled over two CAT6 lines from the shed next doors. One currently supplies gigabit ethernet and the other one 9V DC to feed the Arduino and 12V for the solenoid valves. The Arduino is going to upload statistics to my MySQL storage back-end through a network shield and I’m planning to display samples of this data with a LCD in the greenhouse as well as a second LCD in my hallway. While I’m at it I’m also planning to get the same Arduino to collect weather data (outside temperature, humidity, wind speed etc) and upload it into my database for displaying on the hallway LCD. If I ever find the time I’d also like to make this data available through a web service so I can tap into it with a little Android/iOS app.

My latest addition is a chunky IP54 ABS box to house all the circuitry and I’ve already fitted the first three plugs which are going to connect the fan out lines to connect the solenoid valves and soil humidity/temperature combo sensors.


Next Steps:

I’ve got most of the circuitry for the distribution box built up and tested and the two fan cans (soda can with a little fan, humidity, light and temperature sensors)  are ready to go in as well. Biggest task left on my list is probably somewhere between wiring it all up and building all the soil humidity/temperature combo sensors. I shall report back with another post in the near future :)

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The prospective effects of 3D printing on society or “Mummy, when I grow up I want to be a maker!”


3D printers have taken off over the last couple of years and especially the last half year with more and more models pushing onto the market and competing in particular for the lower budget end of the scale.
High quality 3D printing, dual colour printing and sizes beyond 10cm are still reserved for the price range beyond the £1000 price tag. Still, the available models have usually already been through several revisions, are available as pretty enclosed ready-built units as well as build-your-own packages and (after a bit of tinkering/adjusting) stable enough even for small scale industrial production.
Given the pace at which these systems are developing and the serious amount of highly skilled individuals involved I’d expect 3D printers to be commercially available and affordable for the wider public (<£100) within the next 24-36 months. This will come with benefits to the wider public as well as new challenges which I would like to elaborate on.


Where do we go from here:

3D printers are commonly seen as the big competition for current big scale industrial production. At the moment a new product get’s designed, a production process based on the design put in place and the resulting XYZs then get shipped to the requesting end users. Products are changed at such a rapid pace these days that the machines which make certain products are usually turned off or repurposed for the next/redesigned product iteration before the warranty on the last generation runs out. This leads to what we see all around us in form of a “throw away” society fuelled by firstly the fact that spare parts are not available anymore after a very short time due to non existence of prepared stock and non existence of the machines that once made the units and secondly that labour in the first world is expensive to a degree which, even if parts are available, renders repairs economically unviable. The result is that once something comes out of warranty it will not be fixed but rather replaced with a new equivalent product and if it’s still under warranty the manufacturer is very likely going to provide a new product of the same/next generation to fulfil their warranty requirements. The broken item then often get’s shipped to a country which has low enough labor costs to make the refurbishment a viable option or the broken item is sold off for it’s scrap value. Put a 3D printer into every home and this whole system collapses from two side. Firstly a new economy for the fixing of stuff would spring up as parts would be easily available but manufacturers would also loose their current strong position to enforce fast product cycles. The biggest fear for the big manufacturers comes obviously in the form of copyright theft as we all know it from pirate bay and similar platforms for music/video content and software. At the moment their product designs are protect by physical means as they are the only ones in possession of a machine that can make XYZ but this will soon change and I predict it to change in a incredibly rapid fashion. Once a critical mass of consumers are in possession of a 3D printer the first companies will provide content for them in form of design files to print new “stuff” and parts to fix/improve existing “stuff”. Those companies will quickly grow through provision of day to day items (cutlery, screws etc) and spare parts for the most common things around us (mobile phone cases to name just one example). Existing companies will so be forced to provide files to print their existing “stuff” simply because if they don’t said files will be provided by other means (pirate bay+thingyverse=piratethingies). Once we arrive at this point, and I’d expect that we get there within five years after the first thing on thingyverse has been printed 1Mio times aka the first big hit with enough 3D printers in circulation, current manufacturers have lost their position. Parts to fix their current designs are available at little to no cost and everyone can pick the version of XYZ they want to print hence they will not be able to force new product versions anymore. We have seen all this before with other forms of copyright theft. The means, with exclusion of satisfactory distribution of 3D printers, are in place and the legal threats have proven to be a rather toothless tiger. It’s still hard to see which sub-category is going to spring to live first, printing whole products, printing spare parts or printing add-ons and I think in the end it will depend on where somebody has the first ingenious idea. Finally it won’t matter though which snowball starts the avalanche, the result will be the same.


Other supporting factors:

One other critical aspect of how quickly this whole thing is going to happen could also be 3D scanning. This field is making rapid progress as proven through products like Kinect or the upcoming Google Glass so I would not expect it to be the major holdup. There’s also the fact that 3D-CAD design is very much established, free applications are available and use of the technology to manually create digital blueprints of existing things should, although time consuming, be very much feasible given the amount of qualified designers. Add the fact of novelty and potential revenue from a newly emerging market and the first undergrad is going to create files for everything in their room as a coursework… In reality the process of creating 3D printer friendly files of the most essential everyday items, repair parts and interesting “stuff” which was sold within the last 5 years is achievable, after all everything only has to be documented once. Just have a look at the amount of instructables available. Most of them are already “strip and rebuild” projects which are documented with a video camera. Make that a different camera and exploit the additional documentation/drawings and we’ve got quite some collection of data to start printing. I still remember vividly the initial discussions I had when I started to rip my CD collection, nobody believed me that soon everybody would have their music available in digital form and the biggest veto argument was that nobody would spend the same amount of time as me especially since the whole process only really got useful once one also scanned in the covers and typed up the song titles. Reality is that today I can insert a CD into the iMac which will then automatically identify it, suck down the titles and artwork from a couple of online databases and then dump the whole lot onto my drive. And, although nobody believed me back then, all this did not take 30 odd years because although it seems a mamuth task for the first person to digitise their collection further users found that they could build on this work and suddenly found themselves in a position where they could simply download the whole lot without spending any time of their own at all. Making files to copy the things around you will be exactly the same scenario with the same result, most people just can’t look beyond their own door step.

Once the process is in full swing we’ll obviously have individuals printing for their own requirements but also small scale industrial 3D printing simply because the little commercial printers won’t be able to print at the volume some people are going to require (e.g. small local businesses). Where the line needs to be drawn between 3D printing and industrial printing is probably going to be a hard decision and quite blurry, my best guess is that it’s going to be done based on volume. Obviously it’s important to distinguish between residential and commercial/industrial production to avoid illegal mass production, illegal workers and to ensure that employers follow all employment laws.


Dangers or new possibilities?
Initially there will be the unavoidable uproar of “we’re all going to loose our jobs” but actually this is only partially true if at all. It will more likely result in a shift in type of roles or even an increase of local lower pay roles.
These days the main earners from industrial production are very few individuals. Due to process automation fewer and fewer actual people are needed and the ones needed beyond a management pay grade are very highly payed and trained individuals to keep the automated systems alive and the designers of the “new stuff”. We’re still going to need some of those for larger scale objects (it’s unlikely that you can print a car anywhere soon unless you have another house to store the required printer).
Delivery drivers won’t see much of a decrease either. The huge chunk of deliveries I expect to be pushed out to people’s doors in 2-3 years will be food and, thanks to 3D printing, raw materials for people to print their own “stuff”. The bigger threat I see for delivery drivers are drones but that’s a post for another day.
In addition to this there is a whole array of new local job profiles which I expect to emerge including training for them and surrounding industry to produce tools etc. The most obvious one I think is the maker. He/she’s the one which people contact to solve problems. A bit like a new type of advanced techy handy man this person will have knowledge in electronics as well as engineering and know where to get the necessary raw materials and further specialists if required. This person will be able to handle smaller repairs/improvements with locally printed parts as well as automation/improvement to local processes/infrastructure with established rapid-prototyping platforms and their successors (Arduino/RasPi) but also have a good eye for design and colours as the results will be in direct contact with the end customer. Further specialists will be drawn in on demand for more labor intensive tasks (dig the 20m pond for the new automated pump) or special trade skills governed by additional laws (gas/electricity etc). This will put said new trade of a maker into a extremely powerful position. Other trades will depend on this one and a huge amount of knowledge, materials and services will flow past/through this profile. I can envisage local maker shops just as well as out-of-the transit makers. Many people will be able to operate their new 3D printers but they will require assistance for projects beyond a certain scope which means they are likely to require the maker’s help for this. Where home automation today boils down to buying another generic product which can only ever fit partially people will get exposed to the ecosystem around their 3D printers which was born in the rapid development and maker world hence soon start to request the presence of their local maker on a regular basis. In fact these new maker roles already exist, admittedly on a very small scale, and are currently present as the people behind the web shops which supply the maker ecosystem and to some degree also members of local hackerspaces which already influence teaching of the next generation.
On a bigger scale larger companies or even towns could start to see it necessary or at least as advantageous to have their own permanently employed maker/makers. This could also be fuelled by new legislate to decrease the amount of “old stuff” we throw away. It might simply be cheaper to employ someone to fix if the penalties are high enough and I expect those to raise sharply in the future given the size of rubbish mountains and pollutants around us. Also natural resources are not going to last forever so there will be a point in time where it will simply not be possible to constantly recreate everything rather than fix which will again be reflected in rising prices for said materials which is going to justify even first world salaries for repair work.
Another thing I foresee very much from the start when residential 3D printing takes off which makes me happy is the fact that designs are going to improve. The big brands will simply not be able to push for new product iterations anymore so their only hope for competition against “the maker round the corner” is provision of high quality designs and associated spare parts but also the fact that their designs need to be highly functional, easy to maintain and also reasonably pretty. We have the pretty bit now but I think we’ve lost the first two aspects over the last 10-15 years. As another positive result I would expect a lively link between local makers and manufacturers which will allow for feedback to flow back to manufacturers on a scale which we currently don’t have which will again improve the products and make them more suitable for the end users.

There are unfortunately clear dangers attached to 3D printing as well which can not be ignored and they will need dealing with. First example I’d like to mention are low quality/illegal materials. 3D printers will be operated at home so the raw materials need to meet certain health standards. Todays filaments get heated to melt them down and build up the new “stuff” and it’s just a matter of time until the first illegal filaments hit the market which might fill the room with “god knows what” when melting. Unhealthy filaments/materials will also be problematic as some of the newly printed “stuff” will get in direct contact with the customer and their food (new knife, new blade for food processor) which raises the bar for healthy materials even higher. In the long run I’d expect lawful punishments for circumvention of new laws which govern those new 3D printing materials just like we’ve got them in other areas these days. To avoid other issues there could easily be different “grades” of material. There is no need for all material to be expensive to a degree where is can be allowed to get in contact with food. This will probably be a cost vs safety exercise and depend on designs/security on the printer facilities as well as the future social situation (<- I’ll never give up on hoping society improves and monkey starts to “think” before monkey “does” ;) .
Second example, and that’s the one I personally dislike, is weapons. It will unfortunately be possible to abuse this technology like any other technology. Printing of weapons like plastic knifes will be hard to prevent as many people will have legitimate reasons to print them so a cap on quantities for certain “new things” is probably needed but might be hard to implement and enforce in reality.


Final thoughts:

I’m all for 3D printing but as outlined above there are some dangers which will need addressing. This woud obviously be easier if they were to be taken into account now rather than retrospectively once the first million printers have sold but, looking back in time, it is likely that nothing will get done until it’s an ever so slightly tiny bit too late or in other words until we can really no longer delay spending some of the scarce resources of government funded time and money. The thing I’m most excited about looking at the whole subject is the fact that I expect the advent of “3D printing for the masses” to have a very positive impact on society and not only improve local communities but also have beneficial long term effects on the quality and maintainability of the “stuff” we own as well as the long term ecological sustainability of our society on planet earth.

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