Smartphone Macro Lens from broken DVD

This is not my original idea, but one I stumbled upon on the internet.  Someone posted a hack (this one) so I thought I'd have a go myself.

I don't have any pictures of the DVD teardown, but it was a Dell laptop unit.  I just used a small screwdriver to remove all the screws.  When you get to the lens unit there were 2 lenses - the one you see with the drawer open, plus another buried amongst a series of prisms.  I'd imagine they're all broadly similar, but your results may vary.  Anyway it was the second hidden lens I used (although more on the other one later).

I found a plastic cup thingy (no idea what it was, you could try a strip of plastic or a screw cover), and drilled a hole to mount the lens.  It's not glued in, just an interference fit.  Might add a dot of superglue just to secure it.  Once I'd tested it by taping it in place, I needed a better solution for mounting to the phone.  Experiments with paperclips were fiddly and scratched the phone's case, so I went simple with elastic bands.  You can see the results in the pictures below.  The lens needs to be about 2-3mm from the object being photographed, and you'll need a steady hand to minutely adjust the height.

The other lens I taped to the front camera of my Surface, and initially thought it wasn't working, but the magnification is huge and the object needs to be really close.  Takes a steady hand and the focus is tricky to get right.  Possibly a bit fiddly for casual use!

Cardboard tablet or smartphone stand

Now available in hand made carbon fibre from Jolly's Carbon click here

The latest in a series of home-made things to do with a tablet, I wanted to make a simple stand so my wife could use hers to show recipes/crochet patterns/whatever.  It started out as an inverted v-shaped bit of card slotted into 2 runners, it worked but was a bit clunky.

My work colleague, a technician by trade but an artist at heart, decided that it could be a lot more elegant with her triangle-based design.  So with Adobe Illustrator we knocked up the template you see here.  It was cut out of artists' mount board and as you can see is pretty sturdy - to the point where it will (just about) hold a heavy Microsoft Surface.  The tablet shown is a quite lightweight 7" Chinese job, so you'd need to scale it up for a full-size iPad.  If you want to have a go you can download the pdf here.

UPDATE - my work has a CNC machine which can cut plastics, so I sent them my design.  It's 3mm hard plastic, so the fold needed to be made with a hotwire.  This limits portability, so stay tuned for a new version in 2 parts with an interlocking system!

Also in this series:
Tablet case made of a book
In-Car headrest mount made of a DVD case 

Simple tripod mount for smartphone

I found I wanted to mount my smartphone to a tripod base to try some time-lapse photography (as you do).  There are some nice ones out there to buy, but I needed it there & then.  So I found an old plastic thing - I don't even know where it came from, but I could have used anything similar, like a bottle cap for example.  Obviously it needs to be deep enough to give some support.  I cut 2 slots in the sides.

I had previously taken apart an old broken camera and kept the tripod mount doohickey, so I cut a square hole and glued it in.  I guess you could use a nut of the correct thread size & pitch (sorry, don't know what that is).

So now my phone sits nicely in either aspect on top of its tripod.  If I need more security I just add an elastic band!

Android "Avoided Poor Internet Connection" Error

Here's another 'I Googled this problem and found another solution' post.  

My wife's phone (HTC Desire X, running ICS) refused to connect to the home WiFi, and in the settings the "Avoided Poor Internet Connection" message repeatedly appeared.  Changing to a static IP address fixed it for a short time, but it came back.

A bit of research seemed to indicate this is quite common on Android devices, but the solution involves having root access.  I'm quite happy to attempt rooting my own devices, but don't really like mucking about with others', so I found myself reasoning thus:  the accepted solution is deleting files in a system folder, which must store information about the wireless connection, like its SSID.  So if the SSID is changed, the error might go away.  And it did.

So the short solution (for me) was to change the router's SSID (WiFi name) and we're all working again.  Obviously it's a pain to reconnect every wireless device in the house, but worth the effort.  I've also fixed the IP address which with a bit of luck will help stop it happening again.  The problem I think stemmed from my router starting to fail, and a new router is connecting efficiently now.

How to get 6 plectrums on one card - Pickmaster

I recently bought a Pickmaster plectrum punch which is a great way of making your own free plectrums from unused plastic cards, and if (like me) you have access to a card printer, it can be used to make promotional plectrums for your band!

I experimented with the number of cards which can be punched from a single card, and got to a maximum of about 4 or 5 without too much trouble.  However, if you're prepared to do a bit of extra cutting it's possible to make 6.  Here's how.

Using this template on a standard sized card, cut it up into 6 pieces with sharp scissors:

Putting the pointy end of each piece into the Pickmaster, carefully line up the edges through the aperture,  to avoid flat bits, and punch it out:

I've made a couple of very minor mods to my Pickmaster - a velcro tie to keep it shut, and a handy file (I think it was a knife-sharpener from the pound shop) to neaten up any slight rough edges.  I notice the new Pickmasters have a bit of sandpaper glued to them in the same place, so I'd like to think I inspired that!

If you're into guitars (and you must be to be reading this), then have a look at my band's website -
Hot Cold Ground Blues Band.

Tablet Car Headrest Case

Regular viewers may remember my tablet case made out of a book, and you'll know I like to make stuff out of things I already have laying around.

I wanted a holder for my cheapy 7" tablet so that my daughter could watch her cartoons in the back of the car on long journeys.  Yeah I know you can buy a portable DVD player for not much, but we don't do long trips that often, and why spend when you can bodge?

So what we have here is a standard DVD case, I cut away a screen-sized aperture in the back (where the DVD would normally sit), and generally cleaned it up and made it fit.  I added velcro closures on the sides, a small bit of foam inside one edge for a snug fit, and a fabric mat (the stuff you get in between keyboard & screen in the packaging of a new laptop) to prevent the back from getting scratched.  I used velcro ties from an old server, threaded through grooves melted into the case with a soldering iron.

Also added are a couple of cutouts for charger and headphones, and (not shown) a small finger hole so the power button can be pressed in the case.

It's not perfect, but still very much functional and cost nothing.

Update - made a few changes:  gaffer tape to neaten up the top & bottom and cover up gaps, a small hole to access the power button (circled), and more sturdy fixings for the velcro closures (also circled).  As the hot-glue doesn't stick to smooth plastic very well it started to come away, I basically made plastic rivets.  I melted a hole through velcro and case, then found a straw from an air duster (you could also use a WD40 straw.  Using the soldering iron, I melted the straw into a mushroom-shaped end, passed it through the hole, trimmed it off and melted the other end flat inside.  

Shure SM58 microphone repair

Book-based tablet case MK2

OK, so I've upgraded my tablet from the crappest tablet in the world (see here), to a slightly less crap one.  It's still the cheapest of the cheap (a NATPC M009S off eBay - it's got dual-core processor, 16GB NAND, 1GB RAM and a 1024*600 screen, running Jelly Bean, all for £65), but it's smaller than the old one, and so needs a new case.  

I really couldn't face all that palaver with cutting out pages again, so found this book - of 1962 vintage - which was the perfect size, and used the foam packaging which came in the new tablet's box, glued around the edges.  Extra little cube at the lower right enables me to press the power button and use it without taking it out of the book.

Plus it's just about perfectly pretentious enough to be reading Brecht (in the original German, naturally), when I'm sitting having my lunch.  "You reading Leben des Galilei there, Daniel?"  "Yeah, that's right."  I don't even speak German, tee hee.