Valen

Member Since: October 12, 2008

Country: Netherlands

  • Product PRT-12693 | about 3 weeks ago

    Seems like a bargain if you need bulk. Only 2 mm shorter than PRT-10158, and you need to manually shift the plastic along the pins. Or is there some other difference that I am missing?

  • News - New Product Friday: Uno M… | about 9 months ago

    Is anybody else looking at that black Metawatch, and thinking:

    “Kitt! Come around the back of the building and pick me up.”

    “Yes Michael, I’ll be right there!”

  • News - According to Pete - The T… | about a year ago

    Figuring out the current path in that resistor cube will make you feel like you are time traveling. But not to the past I’m afraid.

  • News - Your March Caption Contes… | about a year ago

    Sparkfun Product Development Team try to experience how to stacked Arduino shields mate to one another.

  • Product PRT-10967 | about a year ago

    Diode drop to CE pin doesn’t work. The current is in the order of uA, so the voltage drop is much lower than 0,7. Even tried it with a yellow led to make it shut of around 2v. No workie. Neither did a simple voltage divider on Vin (1M+220k). The shutdown threshold was not sharp enough. Going to try to switch it with a true voltage detector.

  • Product DEV-11712 | about a year ago

    pcduino_mechanic_bottom.pdf inside the Mechanical Drawings document is corrupt according to my Foxit Reader v4.3.0.1110

    [edit]Download from the PCduino site doesn’t work either.

  • News - Don't Forget Cyber Monday | about a year ago

    Timezones is not the hard part, imho. Y'all should just switch over to the 24h system, instead of this am/pm nonsense. Or atleast start counting at 0 when the next day starts. Not at 12, going upto 12:59 and then all of a sudden from 1:00. Madness I say. ;)

  • Product PRT-10967 | about a year ago

    I just had an idea. If you cut through the center track on the bottom. And soldering one or more silicon diodes in series between Vin and the via behind the regulator (or the middle pin if you can handle soldering tiny things) should get it to shut off in UVLO situations. It should shut off when CE goes below 0.3 V. So if Vin is a silicon diode drop (estimating 0.6 V) higher, it would shut off when NiMH cells are near-empty around 0.9 V. Similarly 2 NiMH AA would require 2 silicon diodes in series. 0.3 V + 2x0.6 V = 2x0.75 V It’s a bit close to degradation voltage. But maybe you are able to select diodes when buying a big bunch, with higher than average voltage drops.

    Caveat: I don’t have these (yet) so I can’t test. Just a suggestion.

    P.S. If some one can test this for me. As I don’t think I can generate controlable low Vin with the limited equipment that I have.

  • Product PRT-10255 | about a year ago

    Can we get a revision of this board that is a bit easier to mod, like for through-hole resistors for the under-volt lockout. Soldering these, or extention wires onto to those tiny surface mount resistors isn’t exactly mechanically sound engineering.

    I like the small footprint as it is. But I guess expanding it’s size for that wouldn’t take that much.

  • News - New Product Friday: Form … | about 2 years ago

    At 4 minutes: “ … a servo test signal, with millisecond precision…” I guess that should be microsecond. Such a pulse would be between 1 and 2 millisecond in length already.

No public wish lists :(