I have an Arduino driving 6 separate MAX7219 displays. My data will display very quickly for a split second, but then disappear. Each one can be driven fine when only one is running. What is happening? More info can be provided if needed.
I've posted a new video on the http://ralphsrobots.com site.
This one is about using fixed point math in computer programs in general.
Fixed point runs faster and takes less program memory space. This is because when you use floating point math, sophisticated procudures are automatically linked into your program.
How was your week? We got to spend a couple of days trekking around the Carnegie Mellon campus in Pittsburgh, PA to check out some of the latest projects from the school's world renowned Robotics Institute -- a trip that culminated with the bi-annual induction ceremony from the CMU-sponsored Robot Hall of Fame. Given all the craziness of the past seven days, you might have missed some of the awesomeness, but fear not, we've got it all for you here in one handy place -- plus a couple of videos from the trip that we haven't shown you yet. Join us after the break to catch up.
Butlers, lunar rovers, snakes and airboats: the best of Carnegie Mellon's Robotics Institute originally appeared on Engadget on Sat, 27 Oct 2012 12:45:00 EST. Please see our terms for use of feeds.
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This classic project from MAKE alum Mark de Vinck is a great last minute project that will scare the candy out of any unsuspecting trick-or-treater. It's a relatively simple build that can probably be pieced together with items you have laying in your junk pile or picked with a quick trip to RadioShack and the auto parts store.
The 12 DOF hexapod kit from DAGU is one of the simplest hexapod kits ever!
Quick and easy to assemble, the body only consist of 12 leg segments, 12 foam rubber feet, 12 servos and a base plate with a hole pattern that allows controllers and sensors to be easily mounted.
Are you interested in learning more about Arduino but don't know where to begin? Check out the Getting Started with Arduino Kit available in the Maker Shed!
The DAGU Red back Spider controller is an Arduino Mega (1280) compatible controller that is especially designed for driving a large number of servos. All 70 I/O pins are terminated in servo compatible 3pin male headers as well as the standard female header and the power supply is a switchmode power supply delivering 5V @ 3A from an input voltage of 7V - 32V.
We've all had that moment where we sit in front of the keyboard and have trouble just getting started. It can be an especially dire problem when the 30-day deadline of National Novel Writing Month (NaNoWriMo) looms overhead, and that was enough for inventor Steve Hoefer to craft his own USB progress meter. The Arduino-based contraption advances a real-world dial or gauge as the word count reaches the NaNoWriMo servers, giving that extra incentive to meet a daily goal or hit the ultimate 50,000-word mark on time. Hoefer characterizes it as a simple project for those who know their way around an Arduino controller; the toughest part for them may just be constructing the box that keeps the meter presentable. Full instructions are available after the break, although we'd hurry to build the meter before November starts. It could all too easily be the source of the very procrastination we're trying to avoid.
Filed under: Peripherals, Alt
NaNoWriMo progress meter uses Arduino to fight writer's block, may be its own distraction (video) originally appeared on Engadget on Thu, 25 Oct 2012 14:34:00 EST. Please see our terms for use of feeds.
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Steve Hoefer of Grathop Labs built this Arduino-controlled novel-writing progress meter.