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SparkFun Electronics will be closed on July 3rd, 2015 in observance of Independence Day. Any orders placed after 2:00pm MT on July 2nd will be shipped out after the weekend. Thanks!

jweather

Member Since: September 17, 2010

Country: United States

  • Where’s the video?

  • digitalWrite() is not particularly fast – it has several unnecessary lookups, including checking each time to see if it needs to turn off the PWM timer for that pin after a previous analogWrite(). The fastest, but least convenient method, is direct assembly commands. A compromise that worked well with my project (playing music on stepper motors) was a more efficient I/O library: http://www.codeproject.com/Articles/732646/Fast-digital-I-O-for-Arduino

  • Schematic and manual are 404.

  • 20.2mm hole = ¾" paddle bit plus some sanding

  • Everyone will recognize it as the iPhone Voice Memos icon… at least until iOS7 got rid of it!

  • I was somewhat disappointed with the limited scope of the first GoldieBlox toy, but my 5 year old daughter was not. It’s not a good fit for all girls, certainly, but it seems to me like 95% of their target demographic (4-9yo girls) are into princesses and pink everything. And my daughter likes that it’s unarguably her toy and that her older brother has to ask to play with it.

  • Pretty cool… the quad itself looks identical to the Syma X1, which has been a very robust (and cheap at $35) micro quad in my limited experience (survived repeated tree-ings, so that’s something). The X1’s controller is visually similar to the QX130’s, except that the “aux” buttons are fake and do nothing.

  • We have a museum exhibit where iPads are placed in podiums while the user interacts with a video wall. Each iPad (provided by the museum for the exhibit) has an RFID tag inside the back of its case, and the podiums have the Parallax RFID modules built in. The user interacting with the video wall then has the ability to save items to the iPad, and the RFID allows the computer running the video wall to know which iPad is sitting on the podium so it can update the app on that iPad. Very seamless, and fun to prototype too. Adds some useful physical knowledge to the software world.

  • Here’s the original of that chart, minus the JPG artifacts: http://xkcd.com/radiation/

  • For balloon recovery… if your balloon lands on a mountain higher than 22k, I guess you can write it off. :)

No public wish lists :(