×

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!

bsmithyman

Member Since: June 30, 2009

Country: United States

  • Now, when you’re soldering a chip with multiple leads, sometimes it works better to use a larger iron and lots of flux.

  • We didn’t have the heart to tell them that Cirque du Soleil’s Arduino-themed show was cancelled.

  • I think the LynxMotion stuff is made out of laser-cut polycarbonate/Lexan. I don’t think it’s so much a matter of it being impossible as it is a matter of it creating highly toxic fumes (feel free to correct me if I’m wrong).

  • In hindsight, he should have waited for the epoxy to dry before he tested for leaks.

  • Our most advanced technology in a magical & revolutionary device at an unbelievable price.

  • Actually, if you wanted to attach an older USB hub to a Nokia N800, this would work okay. A lot of them have full-sized B jacks on them. Same goes for some “docking stations” and the like, or older USB hard-disk enclosures.

  • Any plans to update the Koala with the TPS61200 boost converter being used on some of the newer boards?

  • I might be missing something, but is there a way to turn this thing off short of disconnecting the battery? I.e. if I was creating a battery-powered device, would the power regulator continue to operate and drain the battery even if nothing was drawing power through the output terminals?
    Thanks!

  • Yep, in fact if you went with a fair bit more DSP processing power, you could do cross-correlation of the signals and filter based on azimuth, for example. An example with data from New Zealand: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.70.6544&rep=rep1&type=pdf<br />
    Or another using the USArray deployment in the western US:<br />
    http://ciei.colorado.edu/ambient_noise/

  • The issue is partly one of sensitivity – like Eric-Montreal says above – and partly one of bandwidth. Accelerometers are nowhere near as sensitive to low-frequency signals as even a mid-band geophone, so you’re only going to get the spiky high-frequency portion of the signal.<br />
    <br />
    I’d suggest taking a look on places like used equipment suppliers; try to find a seismograph or geophone with a 1 Hz low-pass (or lower). The output will be a signal you can amplify and measure with an ADC, and the size and weight will be sufficient to keep it a bit more stable. If you want to get really serious, you could talk to GNS science and see if they have anything used that they’re looking to get rid of (http://www.gns.cri.nz/). They’ve got offices in Wellington and Dunedin among others.

No public wish lists :(