Ed Hartnett

Member Since: December 4, 2010

Country: United States

  • Product KIT-11591 | about 8 months ago

    OK, got it, built it, now how to I use it to reprogram a LilyTiny?

  • News - Enginursday - Three Child… | about 8 months ago

    Because you are stirring up the contents, which speeds up the chemical reaction. You can also warm them for the same effect.

  • News - Free Day, Lotteries, and … | about a year ago

    Anyone who is buying from SparkFun already has enough knowledge to make as much money as he or she wants. So use the money to educate kids up to the point that they can order stuff from SparkFun and know what to do with it. At that point, they don’t need any more help.

  • Product TOL-11298 | about a year ago

    No, it doesn’t, but I wish it did, or at least there was a link to the matching female part, I can’t find it…

  • Product COM-10259 | about 2 years ago

    This contributed to the BEST HALLOWEEN COSTUME EVER!
    I was a LASP satellite, and these LEDs lined my satellite, pulsing with random colors in response to sound. (Great for dance music!)
    I used 2m of these LEDs, 6 MOSFETs, and 2 photoresistors to create a replica of the Total Irradiance Monitor instrument, built by LASP in Boulder, flown by NASA into space. My costume not only had dance lights (which even the real TIM doesn’t have!), it also has a radiometry mode, in which the lights indicate the light detected with the separately gimbaled TIM instrument (also made of cardboard).
    (I am about to start work at LASP as an engineer on the next version of this instrument!)
    The whole thing was powered by 8 C-cells, which provided 12V to both the LED strands and the Arduino plug-in external power supply, which was very handy.
    The LED strands (which I LOVE) did not stick super-well, and, after spending the night in the car, one of the strands snapped when I tried to bend it back into place. Whoops! Should have let it warm up.
    But it was a great costume that garnered lots of attention on the mall last night. ;-)

  • Product PRT-00116 | about 3 years ago

    Great! Thanks!

  • News - Email Counting T-Shirt | about 3 years ago

    Can you find a smaller battery (like a watch battery) that could do this?
    I think it would also look good if you sewed a pocket over the electronics parts.

  • Product PRT-00116 | about 3 years ago

    Once I have, say, 4 pins sticking out of my board, where do I get the parts to make a connector that I can plug into my board?

  • Product PRT-00116 | about 3 years ago

    I must disagree with complaints that these are overpriced. SparkFun is a hobbyist’s dream company, developing boards, prototyping stuff, and giving great advice. It’s fair that the should charge more, because they do add value.
    If I needed 10,000 units, I doubt I would think of sparkfun. But if I need < 10 units to finish a board or project, I’m just as happy getting them from SparkFun as going around shopping for the best deals. When shipping costs are taken into account, it’s easy to get these parts thrown into the same box with my SpeakJet shield, and still come out ahead.
    So carry on, SparkFun!

  • Product BOB-09964 | about 3 years ago

    This is similar to what the code does. It takes a max difference, compares new values to it, and also decreases it (to make the thing more sensitive with time, unless another loud sound comes along to reset the max).
    It works well with loud dance music! Fortunately (since this is the application I have in mind), such music is a very easy target. The loud bass beat of a dance song really hits this mic, and my light strip pulses nicely.
    I found that it’s best to randomly vary the color over time, changing about once a second. Any faster, and the eye’s POV just causes the colors to blend too much, and it just seems white.

Name Pieces Total
stuff
37 178.5