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How to power several devices from an emergency battery pack.

Recently (actually almost one month ago :), I had to power several devices (three different units) using one of those battery packs with an USB output ( The easiest way to do that is to power a USB hub with your battery pack and then use the hub to provide power to all other devices. That will work OK as far as the current needed by your devices fits the output of the USB hub (around 100 mA).

picoFlamingo 0.4.2RC2 (minor release)

This is a picoFlamingo minor intermediate release (the second release candidate). Source code is available from the project website:

This release includes some clean up but the main addition is preliminary support for Raspberry Pi, and preliminary means some imitations.

A couple of HDMI to VGA adapters (BeagleBoard, Pandaboard and Raspberry Pi)

Recently I acquired a couple of HDMI 2 VGA converters. I'm interested on interfacing my small boards to VGA devices and, as many of us already know, finding a working one is a trial and error process. So here are my results and I hope may be useful for somebody else.

I've got two different models (powered and unpowered) and tested them with my HDMI enabled boards (BeagleBoard, PandaBoard and Raspberry Pi). These are the links to the devices in case you are interested.

Raspberry Pi finally arrived. Some pictures

It took more than 5 month to get our Raspberry pi. It finally arrived this morning. Most of the enthusiasm was gone weeks ago, but anyhow we had to check the board. The initial plan is to port picoFlamingo ( to work on the Rpi, but I do not think that anything will happen before Xmas break. Some stuff for PandaBoard needs to be finished first.

Anyhow, a couple of mandatory pictures for new devices.

Raspberry PI. Three more months to go...

Some time ago (actually around three weeks more or less) I expressed my interest on the Raspberry Pi and a couple of days ago I'd got an invitation to order, so the small board will arrive, hopefully, within the next 12 weeks... That's really a lot.

No special interest on the Raspberry beyond the low price profile for a modest/small GNU/Linux computer. I mean, there is nothing I cannot do with my BeagleBoard or PandaBoard that I could do with this raspberry but deploying them as Arduinos.

Adding analog inputs to BeagleBoard

Now that we can power our BeagleBoard through the expansion header (, it is time to go a step forward and power picoFlamingo on batteries. Using the expansion header we can easily include the batteries inside the case to power the system and keep it pretty small. But, what is still missing, is a way to make the system aware of the battery charge.

Powering the BeagleBoard through the Expansion Header

Anyone that had tried to produce a kindof closed thingy based on a Beagle has finished up with a bigger-than-expected box or with quite some connectors sticking out the box. The power jack is a difficult one because you always need power.

It is not that much of a problem as you need to connect your board to some kind of power source anyhow, however, for a "better finished" product you will expect things like a power switch and some LED indicator in your project's box (the POWER_ON led on the BeagleBoard is not very useful when you put the whole thing inside a box). Even worst, if your system will run on batteries it is not very aesthetic to see a big barrel connector going out your box into the Beagle power plug.

BeagleBoard to ID-12 Revisited. 1 Euro Interface

Our previous interface to ID-12 was pretty cheap. Around 2 Euros for a Logical level converter and some wires, but as the ID-12 RFID reader does not need any programming or command in order to work, we end up just using the RX line from one of the available channels in our converter. That looks like a waste :).

BeagleBoard UART2. Interfacing to RFID reader ID-12

Recently we've been exploring the Beagleboard Expansion Header on our old BeagleBoard C3 board running Ubuntu 11.10. We installed Ubuntu following the instructions on Then we explored the GPIO pins in the header ( finding out how to use them as inputs and outputs and later we tried the I2C bus ( using just a couple of components for those of us that do not want to invest a lot of money on simple tests.

BeagleBoard I2C. Interfacing to the WiiChuck

After playing with the GPIO ( for a while, let's move on through the BeagleBoard Expansion Header. Now it is time for the I2C bus. I2C bus is available through pins 23 (Data) and 24 (Clock).


BeagleBoard. LEDs and Buttons

Finally I've been brave enough to solder a connector into my BeagleBoard expansion header to further explore how to attach different stuff to this little one. After verifying that the board still boots (i.e. it survived my poor soldering skills :) I went for the "Hello World" for this kind of hardware... a blinking LED.

Trying picoFlamingo on BeagleBoard C3 with Ubuntu

Actually, the idea was to reinstall Angstrom and set up a working development system on my old BeagleBoard C3. However after several hours fighting the installation and the documentation I just gave up and I tried Ubuntu. Not sure what was the problem, probably I did something wrong, but as a matter of fact I waste several hours with no result.

Promoting your Business with picoFlamingo

One of the easiest ways to promote your business is to add a screen showing some relevant information on your windows or even inside your premises. For instance, showing some offer or the latest products in the shop, making customer easily aware of the news.

VelcroBox. One Case to Hold Them All


We had already tried to build some simple casing for our Beagles but it looks like we are not the most skilled guys out there so we come out with the idea to build something really easy to assemble and robust against "inaccurate cutting". The result is the VelcroBox.

It looks like this :

VelcroBox Finished with PandaBoard side panel configurationVelcroBox Finished with PandaBoard side panel configuration

picoFlamingo Source Code for Download


picoFlamingo "The Cracking Egg" source code is available for download!. A new version of the user manual is also available as well as our current Android Remote Control work in progress. Now you can try it on your preferred device. For the time being we have seen it running OK on Beagle, OMAP ZoomII and OMAP4 Blaze!

Press HERE to download them, or visit:

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