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MADISON, Wis. — Like it or not, smartphones and cars are becoming inseparable — with Bluetooth Low Energy as the communication technology that ties them together.

ML03V11R0BAT2A\3K_Datasheet PDF

MADISON, Wis. — Like it or not, smartphones and cars are becoming inseparable — with Bluetooth Low Energy as the communication technology that ties them together.

CloudFlare pulled the certificate itself, according to a follow-up blog from Sullivan naming the winners. He explained that CloudFlare pulled the certificate as part of its own remediation effort, which was extended to include revoking and reissuing the certificates for its own sites and those of its customers. CloudFlare executives had hoped to avoid the effort and cost of replacing the certificates, as well as inevitable errors from the inconsistent, often convoluted process of not only replacing old certificates with new, but actively revoking the old certificates and making the revocation stick.

As I’ve previously noted, I had a jolly happy time at the EE Live! 2014 conference and exhibition last week. One thing I noticed as I meandered my way around the exhibition floor was the fact that there were flashing LED displays all over the place. In particular, EETimes Community Editor Caleb Craft had created a very tasty Applause-O-Meter” display for us to judge the winner in our Gadget Smackdown sessions.

ML03V11R0BAT2A\3K_Datasheet PDF

Also, speaking of the Gadget Smackdown, one of the presenters was Jason Kridner from Texas Instruments, who dazzled the audience with his mine is bigger than yours” audio analyzer with associated LED display.

And then, as I mentioned in my previous blog on this topic, on my way back from the conference, I ran across a mega-cool audio spectrum analyzer and display at San Jose airport. My defenses had already been weakened by the show (although not weakened enough to cause me to pay the $199.95 asking price). Am I to be the only man (see Creating Gender-Neutral Engineering Prose) outrageously handsome good-looking engineer on the planet without a flashy audio spectrum analyzer LED display?” I asked myself (with only a little quaver in my mental voice).

Thus it was that I decided to create my Bodacious Acoustic Diagnostic Astoundingly Superior Spectromatic (BADASS) display. The more I look around, the more I realize that there is an amazing variety of ways in which one can display the results from a spectrum analysis. Consider the following video, for example:

ML03V11R0BAT2A\3K_Datasheet PDF

Here we see yet another technique for presenting the output data. In my previous blog, I showed one display that had the lower frequencies on the left and the higher frequencies on the right, and that spilt the amplitude (volume) in the vertical direction into series of colored bands (rows) — blue at the bottom, green in the middle, and red at the top.

ML03V11R0BAT2A\3K_Datasheet PDF

Also in my previous blog, we saw another display in which the different frequencies were associated with different colors in the horizontal direction. By comparison, in the case of the video shown above, the creator of this display causes all the pixels each column to change color depending on the amplitude of that particular frequency. I’m not explaining this very well — look at the videos in my previous blog and then look at the above video and you’ll see what I mean.

Now, there are several different aspects to consider when it comes to a project like this. Off the top of my head, in no particular order, we have the following questions to ponder:

He knew he could find a relatively cheap multimeter with serial output. His idea was to read the serial output with an Arduino, then spit out the corresponding audio. Ideally, this would all be packaged in a nice little container for portability.

Mastro was in luck. He found a small MP3 player that could charge over USB, had a built-in speaker, auxiliary input, and extra space in the case. He ripped open the MP3 player, crammed in his Arduino Pro Mini and SD card reader, and reassembled it. By using the Super Simple SDaudio Library, he was able to get the audio output he needed for the MP3 player.

As you can see in the video, the entire setup seems to work quite well. I don’t speak Italian, so I can’t vouch for the enunciation of the spoken words, but it sounds loud enough, and the package isn’t too cumbersome.

Of course, after he was finished, he noticed that there are, in fact, several cheap speaking multimeters on the market. At this point, that has become somewhat irrelevant!

— Caleb Kraft, Chief Community Editor, EE Times


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