QR Code Adventure

Here's a fun game that my kids enjoy.  It's a cool techie activity for holiday and vacation time that adds a little excitement and gets kids up and moving about.  I call it the QR Code Riddle Hunt.

Raspberry Pi Camera with Pan Tilt

I was inspired by +John Ellis's posting about his super cool garage security project to add more video and automation to my Pi projects.  He used a webcam in his project like I did in the Frankenfeeder project.  But I wanted to play with something new and hearing all the excitement around the camera module for the Raspberry Pi I thought I would take a look at it.
UPDATE: Step by Step tutorial version is online

Learning Moment and Science

We had a great family learning moment and experiment I thought I would share.  It was so simple to setup that if you have the parts, it only takes a moment.

Over dinner, my son (3rd grade) talked about a video they watched at school about a young girl who invented a flashlight that worked by the heat of your hand.  I later found the video here: http://www.youtube.com/watch?v=9CCGUMkcbjg.  Big congrats to her, way to go!

Frankenstein Update I

Just a quick update on the Frankenstein project.  It's been slow getting started, but this will be worth it. We wanted to do some proof of concept testing.  So we needed to get a peltier plate in to start working with it.  Well Digikey obliged and we now have this little guy to play with.

Peltier Plate for solid state cooling

Wind Chimes (Arduino, Raspi, and Magnets!!)

Arduino Uno Talking to Raspi via Serial

I'm going to do a quick post on another project I'm working on.  This is not complete yet, but I'll share my progress to date.

Here's the concept:
I'm building a wind chime that does not actually chime, well, acoustically that is.  Instead, it will allow me to play any sound for a chime instead of a metal or wood clunking sound.  I will capture the "striking" of a "chime" (yes lots of quotes) using analog sensors on the Arduino, and then communicate a command to the Pi via a serial line. I am using the Arduino for it's analog pins and its ability to sample incredibly fast.  I'm using the Pi to play sounds simultaneously (Nope, there is no simultaneous audio shield for the Arduino).  Pi audio is a longer subject worth of its own post. But the audio you hear in the video below will not be the finished product.

Frankenstein

Next Project!

We brainstormed a lot about what to do next.  There was even a brief deep dive into possibly building a self contained tomato growing cabinet for my basement, but alas the investments in this project just outweighed a hobby budget.  After a long hot weekend over the 4th of July, we finally landed on a beer cozy that keeps your beer cold.  A Franken-Stein!

These posts will be a little different than the post project Frankenfeeder as I will try to keep up with this as we go.  So far our concept is this:

• Use a peltier plate (a solid state component that moves heat from one side to the other when passing current) to cool the beer can in a beer cozy.
• Use a heavy duty 12/18V battery from an old drill set to provide the heavier amperage and voltages needed to run a peltier plate
• Drink very cold beer on hot days

Frankenfeeder Part III

Pi stuff and Reassembly

This is Part III, Part II is here.

The Pi and what you can do with it is a deeeeep subject.  I'll just stick to the highlights.  Turning on/off GPIO pins, high level Wifi and sundry, and the script.

GPIO Control

Wiring Pi by Gordon @drogon, is an excellent project for low level Pi IO control.  Actually his whole site is just pure awesomeness if you have the time to read.  Anyway, I followed the instructions on downloading and installing Wiring Pi on my Pi.  I've heard rumors this is included in the base distro now, but you might want to check your version of the distro to be sure.
With the wiring pi package there is a binary, the gpio util, that allows you to issue command line commands to see the state of the pins and turn them high/low.