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AndrewMV

Member Since: March 2, 2010

Country: United States

  • News - Friday Celebration of New… | about 3 years ago

    Why is a BJT inappropriate (not challenging you - I’m curious)?

  • Product CAB-10558 | about 3 years ago

    USB A to A? That’s a pretty dangerous thing to give someone - if they connected two PCs together, they could blow up the USB controller on one or both of them.

  • Product BOB-09738 | about 3 years ago

    These LED’s consume more power than any microcontroller could output without some amplification. Per the datasheet, typical power consumption is between 350mA to 700mA per LED - compare that to the 10-20mA of a typical LED.

  • News - Yarn Monster | about 3 years ago

    Easily among the best video-production quality I’ve seen in a build demonstration…and the cabinet built around the device is just perfect :)

  • News - Antimov Competition | about 4 years ago

    I love this idea…it’s like a robotics version of the Rube Goldberg competitions.
    How about a robot who’s purpose is to press its own kill switch, which is suspended 30 feet in the air?

  • Product COM-00683 | about 4 years ago

    I spent some time looking at the TLC594X series LED drivers, and they seem to have a lot of potential…but they all operate as current-sinks instead of current-sources.
    I’m still new to this, but it seems to me that these wouldn’t be usable for a common cathode display like this (you’d need a common-anode display).
    Does this sound right? Is there an easy way to compensate for this that I’m missing?

  • Product COM-00683 | about 4 years ago

    Flip it pins-up. Orient the serial number rightside-up. Pin #1 is on the bottom right. Pin #17 is on the top-left.

  • Product COM-00683 | about 4 years ago

    On mine, the color and intensity are perfectly uniform on all the colors. Are you using current limiting resistors on the cathodes?
    An odd thing I almost missed on the datasheet - the green and blue LEDs are 3.3V, but the red ones are 2.0V (2.2max!). You’ll need to put a voltage divider on the red pins.

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