Member #394180

Member Since: December 31, 2012

Country: United States

  • So sad! All those LEDs and an LCD board and your demo video didn’t show a single one powered up. Think of the visual impact, the irresistabilty of placing an order if only we could have seen all those spectacular colors.

  • Sure. What’s the best way to do that? E-mail you the sources?

  • I ended up doing something like this with my old Magician Chassis. I also used the Edison and dual H-bridge block, but I soldered male pins onto the board and just slipped jumper wires onto them.

    The other Edison feature I used was the access point mode. I wrote a javascript server that runs on the Edison and interfaces with the H-bridge so I’m able to steer the robot with a web interface GUI (usually on a mobile device). It’s fun to have the robot attempt to “socialize” with our cat herd. The herd, BTW, can easily hear the ultrasonic rangefinder used by the robot. Spooky.

  • RTIMULib should also work with this board connected to a Linux box (Pi, Edison, etc.). Mr. Google will tell you where it is.

  • The other thing about using LEDs for light detection is that they are sensitive to specific portions of the spectrum. That is, they are most sensitive at the colors that they emit when acting as light sources. This allows them to be used as sensors in multi-spectral devices.

    Forrest Mims (a living legend and inspiration to those of us of a certain age) used this property to make sensors to study atmospheric light levels at different wavelengths and studied things like the particulate content of the sky over time.

  • I’m not a student, I just pay for their educations. Not only am I paying directly through tuition payments, but there’s also my property taxes which pay for K-12 for everyone in my county as well as my state and federal taxes which pay for universities throughout this nation.

    I’m not still living off my parents with subsidized health care and since I’m over 18 I’m actually responsible for my debts. So every penny counts for me, too, but Digilent will only sell to me at the same price as Sparkfun. Enjoy it while you can, kid. The Real World’s gonna get you soon!

  • Thank you for the suggestion, but if I don’t normally buy it it’s because I’ve read the data sheets and tutorials and watched the videos and decided that I don’t need/want it. My workshop (makerspace for the newbies) is filled with stuff from the 19th century up to last week (wanna see an Edison used as an iambic Morse code keyer for a 1-tube radio transmitter in a 3D-printed box?) so being stuck in a technological rut is not a major problem for me. Just saying that the current incarnation of Free Day has the potential for major frustrations, disappointment and can be a money waster because it’ll cost a lot more than the putative penny and that it makes more sense to just order what I want instead of living in bogus hope. If you enjoy it, I wish you the best of luck and I’ll be out of your way on Free Day.

    Love the snail/turtle metaphor, BTW.

  • So I line up $75+ worth of purchase to avoid shipping, race the herd through the gate, may not get anything at all, or if I do it may be something I don’t want, for a best possible case of savings of $39.94 (if I limit the calculation to things I actually want, best case is $19.94) before tax. If I don’t get what I want I’m pissed off at Sparkfun for another lame promotion. If I do get what I want, I’ve spent north of $75 to save less than $20. Logic says to just order the thing I want, eat paying full price and use the cheapest possible shipping. I’ll still come out many 10’s of dollars ahead.

    The old silent surprise Free Day was much better. It was a gratuitous treat handed out to customers who were ordering something they wanted anyway, a thank-you. This just adds in the worst and most frustrating aspect of the Dumpster Dive turning it into a cynical attempt to whip up a feeding frenzy and prey on people who’ve slept through math class.

  • +1 for 1.75 mm. Currently, I get mine from Adafruit but it’d be nice to have an alternate supplier when they go out of stock.

    I’d also like to see a filament sample pack, something like 2 meters of filament so that I could try out interesting ones to see if they work in my printer. A pack light enough to ship by USPS First Class would let me get it quickly and without postage overwhelming the economy of a cheap tryout.

  • Ooh! New question for the Mensa test!

    Given a website with a search function, determine its category for 3-D Printing.


    Lathe, screwdriver, 3-D printer, Donald Trump. Which does not belong in the “tool” category?


No public wish lists :(