Member Since: April 28, 2009

Country: Canada

  • So it is! Love the geography out there, and love the culture. Lots of people doing what they love to do.

  • I'd be curious to know whether others' experience has been the same as mine, but it seems to me that InvenSense parts are much harder to source than the ST components. Also, while it's perhaps not directly related to this, I have yet to get a response from InvenSense to multiple emails asking about their IME3000 accelerometer (which includes an interface to their gyros). I eventually went to ST, partly out of frustration over that.

  • For the benefit of others who might have the same confusion I had in understanding the part numbering for ST's gyros, I thought I'd point out that the 300 degrees per second range is on the 4x amplified output (and corresponds to the more sensitive of the two numbers above). The unamplified output in fact has a range up to 1200 degrees per second, and is less sensitive.

  • Though you'd still need a programmer if you wanted to reprogram the Mega, I don't generally solder headers onto my projects anyway. Instead, I keep the header plugged into my programmer. Slide the other end of the pins into the holes on the board where you wouldhave* soldered the header, torque it a little to one side, and you're good to program.
    ... Hopefully somebody will correct me if that doesn't carry over to this board, which seems to be a little more whitewashed than I'm used to.

  • Thanks for sharing this! I was thinking the other day about repurposing a stethoscope head for geekier ends (if you can imagine) -- this'll definitely help.

  • Ditto on that. The SparkFun crew were a really great bunch of people -- both the folks at the shoot and those we met at the office. Jumping is a pretty personal thing for me, but you guys were a blast to share it with.

  • Just ran a quick fit using Excel (because I'm too lazy to code something else up tonight, and because even "quick" meant that I was up till 2am), and your data does, in fact, fit a simple model. Modifying a predator-prey model (the Lotka-Voltera equation) to account for the fact that sugar doesn't usually reproduce, I get the following:
    d[sugar]/dt = A[sugar][yeast]
    d[yeast]/dt = B
    which fits your data quite well for A=-3.16E-4, B=8.05E-3, and C=-1.55E-4, with [sugar] and [yeast] both 1 initially. Oh, and one has to scale to go from [yeast] to the rate of gas production. :)

No public wish lists :(