Poor man's smart mirror

By covering a computer display with a mirror foil or a two way mirror you can make a smart mirror - a mirror where you can both look at yourself and get an update from the attached computer. This is typically used to give updates on weather, news, calendar and so on. I have wanted to have one for some time, but the obvious location in the main bathroom has a mirror that is glued to the wall.

Since I am not about to remodel the bathroom or move to a new one, I thought I should look into other ways of achieving a similar effect, while leaving the mirror unharmed. My solution was to combine a unused 4:3 Dell display and a Raspberry Pi single-board computer, and place this so that I could see the computer display's mirror image when I stood in front of the regular mirror.


The application I tried was Michael Teeuw's Magic Mirror. It turned out that my myopia meant that I needed big letters to be able to read easily via the mirror, so some playing around with the configuration was needed. And of course I needed to force the computer to render a mirrored image on the display. The Raspberry Pi can do that, although not as easily as one could hope!

The result is shown in the image on the right. Due partly to WAF the installation did not become permanent. But I am intrigued by the prospect of adding some software for facial recognition and make the display switch dynamically between the mirrored and the normal display, depending on which way the viewer is looking. But since the Rapberry Pi needs a reboot to switch display configuration, I will need computer that implements the RandR protocol to do this.

Actually, there are a number of features that can be designed around such a platform, and an important angle is so called welfare technology - technology that is aimed at helping for example elderly stay at home instead of being taken into care. When I get older I expect that such solutions can help me take my medication, monitor my physical fitness, remind me about appointments and so on.   
  

I'm on sugru.com

I while back I made a cable to connect a JTAG test system to a proprietary DSP board. The cable has a Molex type connector in one end and a RJ45 in the other (not Ethernet), but the Molex side looked vulnerable with bare cables soldered to pins.

So I took some Sugru I had lying around and covered it up. I posted the result on their site, and today I discovered that my contribution is featured on the front page. If you look at the picture you can see my design in the lower left hand corner, see Make a 14-pin, 2 row connector.

Sugur is really a fantastic material, and I look forward to finding more uses for it.

Google selects Arduino for Android Open Accessory

Stop press! Google's initiative for using the Android platform for controlling your environment, Android Open Accessory, has selected Arduino as its platform.

Think of the possibilities - the Arduino is so simple to play with that we can expect "everybody" to play with this. I even have one myself.

With this I can play with simple instrumentation projects and easily interface the real world with applications written in Processing. And now I can also start controlling Arduinos and whatever is connected from my Android devices. Hurray!

But will I find the time? Back in the early eighties I did instrumentation projects with Z80 and similar processors. It was such fun! If my employer practiced the Google concept for employees time to own projects, then I definitely know what I would be doing!

Home made cowberry chocolates

Well, Christmas is coming closer and its time I make some gifts. Last year I had some success with home made chocolates with cowberry filling. So I do the same over again this year. The picture shows my mould and a finished product. The mould is a Plastis ice cube tray from Ikea. I line the sides with melted chocolate, mix cowberry with sugar with a immersion blender and put some in the cavity, and cover it over with more chocolate.

I keep making mistakes, because I don't remember last year's mistakes, but hopefully I remember them next year. Anyway, I am happy about the result, and I plan to make a "Ikea style kit" for assembling a bowl with chocolates. Stay tuned!