Energy Micro EFM32 dev-boards winners

Posted on Thursday, November 17th, 2011 in contest by DP

Today we announce the winners of the Energy Micro EFM32 dev-boards.  There were lots of great ideas, thanks for your submissions.

Congratulations to David, his idea for a subsurface stream water level monitoring and logging system scored him the EFM32 Gecko development kit:

Subsurface stream water level monitoring and logging system. (Ecologically friendly hydrological data collection) Particularly for studying subsurface stream behaviour in caves here in Kentucky. (Especially caves connected to the Mammoth Cave system. This cave system has >300 miles of passages and 5 different underground rivers and their many feeder streams. ) This type of instrument has to be packed in several miles underground through tight passages and set up for unattended operation lasting many months. There is no sunlight available for solar powering the logger and data must be hand collected on return trips since low power radio does not penetrate rock very well.

Noel won an EFM starter kit for his idea:

This looks like a nice dev board. Since this is a low power device, I think it would nice if I power it with solar modules. I have a few more of solar modules and this could be a great charge controller. I hate storing batteries and then after a few months, it’s voltage becomes so low that it doesn’t work with my charger anymore. This looks perfect as a solar battery charger controller.

If I have one of these, I will first create tutorials on how to use it from the simple blinky let to interfacing with LCD, SPI devices…etc, and then use it to control individual charging of a huge row of AA batteries.

The controller should monitor each AA cell individually and implement a deltaV/ deltaT monitoring loop to precisely control the charging of each cell.

In this way, I can just leave it beside the window and let it continuously trickle charge all my batteries.

Eric also won a starter kit for his idea:

This would be great for my smart car project. I have a 2001 VW Golf modified to run on Bio Diesel. I would love to use this to do everything from monitoring/averaging fuel consumption, tire pressure, break temp, fluid temps, maybe tie it into the odb2 port and get some engine readings, and probably do something cool regarding the starter (maybe a pin entry or rfid verification) or throw a remote starter on it so it can warm up the fuel, so it is thin enough to be injected into the engine, before I leave the house in the morning (Chicago winters are brutally cold). Looks like this will handle everything I can throw at it.

Thank you to Energy Micro for the free swag.

Thank you for participating, there we a bunch of great ideas.

This entry was posted on Thursday, November 17th, 2011 at 10:00 pm and is filed under contest. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

6 Responses to “Energy Micro EFM32 dev-boards winners”

  1. David says:

    Cool. I think this is a first. I actually won something!
    Thanks Dangerous Prototypes!

  2. David says:

    Oh, and thanks also to Viswesr and Energy Micro for providing the EFM32 dev-boards. :-)

  3. Viswesr says:

    Don’t mention it. All credit goes to Energy Micro team (for providing us EFM32 kits). I wish you all the best for your project. Write about it when you complete.

  4. Adam says:

    We were really impressed by the number of great ideas here at Energy Micro! Congratulations to the winners and everyone who participated! We would love to hear from you guys with the winner ideas, is it possible to somehow track the progress of these projects on your blog?

    Thanks to Viswesr and Dangerous Prototypes for the initiative, you guys rock!

    Adam (from EnergyMicro HQ, Oslo)

    • Viswesr says:


      I find that the latest EFM32 peripheral library( emlib ) and header files have a license change. It now uses zlib/libpng Open Source License. Thanks for releasing the software libraries under a Free Open Source license.

      • Adam says:


        You are welcome! And thanks for the Energy Micro Eagle library. We will look into it! Keep up the great work and thanks for spreading the word about our Gecko Technology, even in Sanskrit! :)


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