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melstav

Member Since: August 5, 2007

Country: United States

  • Description states that it uses the same control IC as the WS2812. That means that the useful information ( beyond packaging and pin-ordering ) is going to be in that datasheet. Here’s the link: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Components/LED/WS2812.pdf ( copied from https://www.sparkfun.com/products/11821 )

  • I have a couple 5V 2A supplies. Here are a whole slew of them: http://www.ebay.com/sch/5v+2a

    Header P4 exists to supply power to an attached 2.5" HDD. (ref: http://learn.linksprite.com/pcduino/quick-start/explaination-of-pcduino3-headers/ ) It’s typical for startup on a laptop drive to draw 500mA - 600mA from the power supply.

    You’ve got two USB ports (one of which is OTG, but can be driven in host mode) that are required to be able to supply a minimum of 100 mA ea, but that SHOULD be able to source up to 500 mA on request.

    There’s 1 - 1.5A of supply current right there, just in pass-through power supplies. Add WiFi transmit power, power to any Arduino shields you tack onto the board, power to anything connected to any of the various non-Arduino expansion ports…. And that’s not counting the power consumption of any chips on the actual board.

    So yeah. You MIGHT be able to power just the board off a 500mA USB port. Start driving HDMI, LCD, Ethernet, you’ll probably quickly get to the point where even 1A isn’t enough current anymore.

  • Please…. This is SparkFun.

    A bird in the hand is worth two bridging the busbars.

  • That being said, they’re already leaving the 2x3 ICSP header unpopulated. They could have done the same with the two 1x4s. Maybe toss them in the package to be populated by the user if they want them. Or hell, leave them out and make them separately orderable.

    That said, the DIP-8 socket is already through-hole. they could easily make the 1x4s through-hole, insert all four headers in the board, flip it over, and solder them all real quick, all at once. And that’s assuming they’re doing the through-hole soldering by hand instead of using a wave-soldering machine. (which is really cool to watch in-use, btw)

  • Already asked and answered on the Teensy forum

    In short, there are breakouts available now, but a Teensy ++ 3.1 is in the works.

  • The AllWinner A10 SoC actually has a SATA controller built into the chip, but very few board designers make use of it. ( http://en.wikipedia.org/wiki/Allwinner_A1X )

    The Mele A1000 / A2000 is one such device that actually does break it out to a port. http://rhombus-tech.net/allwinner_a10/hacking_the_mele_a1000/

    On page 6 of the schematic, you can see that they just didn’t bother connecting anything to those pins on the SoC.

  • What’s the max current this plug (and/or the included fuse) is rated for?

  • I gotta say, I concur with Jeff.
    If all I want to do over the bluetooth link is serial data, (via SPP) I’ll use an RN-41.
    If I just want to build a bluetooth HID device, this’ll probably be the module I look at.
    But after reading about the WT12, I’ve just added another handful of projects to my todo list which would have been impossible without support for the other profiles.

  • Can this be used (with a pinout adapter cable) with non-ARM JTAG ports such as those on AVRs, MSP430s, etc?

  • Is there a chance that you’ll carry just the bare ATmega preprogrammed with the OpenLog firmware?

No public wish lists :(