rxn

Member Since: January 24, 2009

Country: United States

Profile

Bio

4th year EE student. Loves high powered lasers, making things with microcontrollers, and learning how stuff works.

Organizations

Cal Poly Robotics Club Cal Poly IEEE Student Branch

Spoken Languages

English

Programming Languages

C, Assembly

Universities

California Polytechnic University, San Luis Obispo, California

Websites

rev0proto.com

  • Product CAB-11515 | last year

    I fixed your cable. Took about a half hour, some heatshrink, solder, and hot glue.

    http://i.imgur.com/At5xSvg.jpg

    Stub lengths are ~7cm, just a bit longer than 1/10th of a wavelength at 480 MHz. Android/high speed devices work just fine on it now, though I’m sure the waveforms are still less than ideal.

  • News - Happy Free Day | about 3 years ago

    Thanks Sparkfun!
    I spent from 8am PST till 9:20am PST refreshing the page, watching Twitter and getting nowhere, so I took a nap till 10am, hit reload, and to my amazement, the quiz was back up. As quickly as I could I blazed through the quiz till I got a 6/6 (EE student, woo!) and had to skip the last 4 for time (that bar was FLYING towards the end). Certainly more successful than last year! I’m gonna split the winnings with my roommate, who was also up at the start.
    I hope this serves as a humbling experience regarding what your servers can handle. All that optimization + expansion didn’t seem to help too much eh? I think I’ll take my $20 loyalty money (and an extra hour of sleep) next year though.

  • News - Amazing Quadcopters | about 4 years ago

    These are amazing. It’s only a matter of time before they can make these operate on their own with the kind of power that we’re seeing in the processors of modern smartphones, and getting its position data from better IMU’s + GPS. Don’t forget that landing-on-powerlines charging system.
    Manhacks here we come!

  • Product SEN-09431 | about 4 years ago

    Output impedance for the accelerometer is approx. 32k Ohms (from the datasheet). For the non-amplified channels of the gyros, it’s 33k Ohms (from the schematic). For the amplified channels it’s likely much less and probably insignificant to the input impedance of the Picaxe ADC. If you’re worried about the accelerometer, you can buffer the signal with a unity gain op-amp/voltage follower.

  • Product PRT-09541 | about 4 years ago

    This looks pretty cool, if several of these were storing energy for a while in a capacitor, it might be enough to change an E-ink display.
    By the way, any chance SparkFun will be getting E-ink displays in the future? That would be awesome!

  • Product KIT-09484 | about 4 years ago

    Disclaimer: I own one of these, and it is kind of a piece of crap. Granted, it’s the cheapest oscilloscope you can possibly buy, anywhere, so from that point of view, this thing is awesome.
    I’m not sure if they’ve fixed it in the newer revisions, but the front panel hole for the LCD is too small so you are going to have to route it out with a Dremel or other tool. Also, as soon as you get it, update the firmware to the latest version. The newer ones might be shipping with the latest firmware, but I know it made mine way better, it even upped the sample rate!

  • Product TOL-09263 | about 4 years ago

    No, it’s just one analog channel.
    You can find more details on the manufacturer’s site:
    http://www.linkinstruments.com/mso19.htm

  • Product TOL-09263 | about 5 years ago

    Two questions: Has anyone tried the TDR? Sounds like a really neat feature that sets this apart from other USB oscilloscopes, and how fast does the display refresh on the screen, compared to a dedicated oscilloscope?

No public wish lists :(