promethean

Member Since: November 20, 2007

Country: United States

  • News - Free Day Recap | about 4 years ago

    Yes, money from your previous purchases was used to help entice new shoppers. This happens every day with every product you buy. It’s marketing and advertising. When you made your previous purchases, did you expect that SFE wasn’t trying to make a profit? Or that they wouldn’t use that profit towards the overall improvement of their business?
    I was highly frustrated and disappointed on Free Day too, but only because SFE had set the expectation for the day as a First Come First Served type of event, and that’s not what it turned out to be.

  • Product LCD-08629 | about 4 years ago

    Heck, even if it did double the cost to $10, that’s still quite thrifty for a graphing LCD w/ breakout. So, how about it SFE? Anything in the pipeline?

  • Product DEV-09219 | about 4 years ago

    The max temperature rating for the ATmega328 is 85' celcius. Beyond this you risk chip failure or premature data loss. The 85' should be taken as an absolute max though, since some discrete components, even if they don’t fail, will have temperature coefficients that describe potentially significant changes in behavior as low as the 45'-65' range. For this reason, for any highly calibrated or sensitive project, you will want to research the specific temperature ratings and coefficients of the components you are using.
    Now, all of that said, for troubleshooting purposes you may want to provide some details on your project and how you lost your boards, since these are designed for the momentary heat of a soldering iron, and operating temperatures in excess of ~60' would be difficult to achieve with the arduino board alone and correct voltage.

  • Product COM-00594 | about 4 years ago

    Also, I think you need to resister down your voltage if you’re coming 5 volt from an Arduino or you may shorten its life. Hopefully someone else here can give a more specific recommendation.
    The product listing indicates the correct voltage of 3v, and the data sheet indicates a 40mA max current. So, yes, anything higher and you’ll risk damage.

  • Product WIG-07947 | about 4 years ago

    Sure, it’s overkill as far as processing power & features go, but with the ubiquity of the arduino platform and programming tools, it’s a decent choice to allow more people access to hack it, customizing the firmware with tools they’re already familiar with.

  • Product PGM-09231 | about 4 years ago

    Works great with my ATTiny13a and the 8-pin Olimex prototype board also sold by SFE. The only thing is that the command SFE gave needs to be modified. I changed it to the following:
    avrdude -c usbtiny -F -P USB -pt13 -U flash:w:main.hex

  • Product KIT-09565 | about 4 years ago

    @zv470: Many AVR micros (maybe all? I don’t know) have a built-in clock. For example, the ATmega168 defaults internally to 1MHz, but can go up to 8MHz, and only needs an external crystal for MHz > 8MHz <= 20Mhz speeds.

No public wish lists :(