AdrianFreed

Member Since: May 4, 2007

Country: United States

Profile

Organizations

CNMAT

Spoken Languages

french and english

Websites

http://www.adrianfreed.com http://cnmat.berkeley.edu

  • News - We Have It In Stock | about 8 months ago

    Thanks Nathan for pointing out some alternative sources to Sparkfun, I have not had faulty parts or designs from many thousands of dollars bought from Adafruit, PJRC, Digikey, Mouser and others. I do however have quite a few boards with design flaws or poor manufacturing from Sparkfun so most of my business now goes elsewhere. In the early days I would tell others that Sparkfun was great because, although they do make mistakes, they will respond well to your feedback. I now feel otherwise. I would rather pay a few dollars more for better , more thoroughly thought through and tested designs. This TLC is an engineer’s way of expressing care and that they value their customer’s time. Recent examples of this every expanding choice of quality engineering with the customer in mind include the Seeedstudio grove ecosystem or this very well integrated wifi sensor/actuator system: http://www.x-io.co.uk/products/x-osc/

  • Product SEN-11859 | about 8 months ago

    for $10 more you get at this sensor + IMU + bluetooth LE wireless, 2 buttons and a battery with the TI SensorTag.

  • Product DEV-11197 | about 9 months ago

    This one has some of the features people are asking for: http://logos-electro.com/zigduino/

  • Product BOB-09170 | about 2 years ago

    Not only do these fit badly with DS touch screens, the one I saw had three of the four pins shorted with a solder bridge. I had success with the AdaFruit board which has additional holes to screw it down.

  • Product DEV-11290 | about 2 years ago

    If you are using a smaller Arduino so you don’t need the shield format you can buy the MIKROE-506 from Mouser for $20 with the same chip WM8731

  • Product BOB-11044 | about 2 years ago

    Thanks Mike. Indeed the proof is in the pudding so it depends where your customers install the board.

    If anyone is interested in this issue for their own board designs compare Sparkfun’s to this one: http://www.ti.com/lit/ug/slou134/slou134.pdf

    Also if you find you want lower distortion than 10% (at 1.4W) you can get lower distortion and higher efficiency with this chip by using a higher impedance speaker: 16-32Ohms. The volume wont be as loud though.

  • Product BOB-11044 | about 2 years ago

    Nice chip. Can you please rev. the layout to avoid this problem mentioned in the datasheet: “Place the input resistors close to the TPA2005D1 to limit noise injection on the high-impedance nodes.”

    You have the high-impedance nodes routed all over the place.

  • Product DEV-11098 | about 2 years ago

    To save money, get more ADCís and all the features of the 32u4 boards you will want to look at the teensy and adafruitís 32u4 board. Adafruit just announced the Flora etextile platform based on the 32u4. There are also now 32u4 boards from Olimex and others…

  • Product DEV-10998 | about 2 years ago

    Yes, to save money, get more ADC’s and all the features of the 32u4 boards you will want to look at the teensy and adafruit’s 32u4 board. Adafruit just announced the Flora etextile platform based on the 32u4.

  • Product SEN-10955 | about 2 years ago

    No, that is the 10bit one. the 14-bit one is the MMA8451Q

    *MMA8450Q:Xtrinsic Low-power, 3-axis Xtrinsic

    *MMA8451Q:Xtrinsic 3-Axis, 14-bit

    *MMA8452Q:Xtrinsic 3-Axis, 12-bit

    *MMA8453Q:Xtrinsic 3-Axis, 10-bit Digital

    The datasheets are remarkably similar and the core ADC is 14-bit so there must be some quality sorting going on?

    Incidentally Matt your board also doesn’t follow the manufacturers guidelines w.r.t. nearby holes and centrality of the package.

No public wish lists :(