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Monthly Mindstorms: September 2012

30 09 2012

This is the second installment of “Monthly Mindstorms,” a new series of posts that will summarize the most important news in Mindstorms NXT of the month. News will be organized into the following categories: general news, new sensors, MOCs, and maybe some more that I will add later. Enjoy!

General News

Sept 7th: The Mindstorms NXT Annual Online Competition

Maersk Fan is hosting the first ever Mindstorms NXT Annual Online Competition, judged by himself, nxtstep101, and idkwhoyouare. Head over to Xander’s article at the via link below to find out everything you need to know on a single page, and hit up the source link to submit!

Via: Bot Bench Source: TMAOC

Sept 8th: EUREKA! Problem Solving with LEGO Robotics

Daniele Benedettelli over at The NXT Step reported that Claude Baumann has just released a new Mindstorms NXT book called “EUREKA! Problem Solving with LEGO Robotics.” See the source link for more information and sample content.

Via: The NXT Step Source: ntspress

Sept 8th: RobotC v3.50 released (and 3.51 the 22nd)

From the RobotC blog:

The ROBOTC Development team is proud to announce that ROBOTC 3.50 for the LEGO Mindstorms, VEX Cortex and PIC, Arduino, and Robot Virtual World platforms is now available! The new ROBOTC 3.50 update is free-of-charge for ALL existing ROBOTC 3.0 license holders.Download today and try out all of the new features and enhancements available in ROBOTC 3.50!

Check out the source link for the changelog.

Source: RobotC Blog

Sept 24th: Control a NXT Robot with Android and HTML5

The NXT Step published an article about Wolfgang Beer’s Android + HTML Mindstorms NXT controller.

Source: The NXT Step

New Sensors

Sept 11th: HiTechnic Force Sensor

HiTechnic will soon (“early October” to quote the source link) release an awesome new sensor: the HiTechic Force Sensor. Xander reports that it’s super easy to program, gets very precise readings, and will give you some very useful data. Hit up the source link fo moa.

Source: Bot Bench, image

MOCs

Sept 1st: LEGO Mindstorms NXT 5-axis Robot S750

This assembly robot by akiyuky is awesome! In the demo video, it stacks four colored blocks together to put together a chair. The machine features five axes of movement, and builds the chair with surprising accuracy and speed. Check it out below.

Source: akiyuky (YouTube)

Sept 4th: Segway with Robot Driver

Laurens Valk, creator of the NXT Discovery Book and Inventor’s Guide, has done it again! This time, he released an awesome segway, with the Alpha Rex as its driver!

Source: Robot Square, Laurens200 (YouTube)

Sept 17th: Great Ball Contraption

Even though this isn’t all Mindstorms (it does have an NXT partion), it’s oh so awesome:

The video actually went viral, and now has over five million views.

Source: akiyuki (YouTube)

Sept 20th: The People Behind Cubestormer

The NXT Step reports that the people behind Cubstormer (that awesomely fast LEGO Mindstorms NXT rubik’s cube solver) have published a writeup on their project. See the source link below.

Via: The NXT Step  Source:  Arm Blog

If you’d like your stuff featured here next month, or if you think there’s anything missing from this month’s post, please contact me on my Google+ or my Twitter (sending me a story does not guarantee that it will be in the post).

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Monthly Mindstorms: August 2012

30 08 2012

This is the first installment of “Monthly Mindstorms,” a new series of posts that will summarize the most important news in Mindstorms NXT of the month. News will be organized into the following categories: general news, new sensors, MOCs, and maybe some more that I will add later. Enjoy!

General News

Aug 24th: RobotC 3.5 Beta Released

The new RobotC v3.5 Beta has been released to the world, so go check it out! Some of the new stuff:

  • Full ANSI-C support to support pointers, recursion, and stacks with an updated compiler and updated robot firmware.
  • New and Updated Debugger Windows
  • Updated documentation
  • More! See the source link below

Source: RobotC

Aug 26th: RobotC: Driver Suite v2.8 Released

Xander Soldaat, the man behind the awesome RobotC third party sensor driver suite, has released a new version of the code, adding support for two new sensors and lots more. See the source link for the complete change log and a download link.

Source: Bot Bench

New Sensors

Aug 20th: Dexter Industries: NXTBee USB Adapter

This awesome new toy will let you connect your NXTBee to your computer, for highspeed NXT to PC communication. From the blog post:

The NXTBee USB is a radio for communicating with your NXTBee devices, allowing you to send and receive information to the NXTBee from your computer. Send data to your NXT, receive data from [your] NXT.

Source: Dexter Industries Blog

Aug 27th: HiTechnic: MiniScope

HiTechnic has some new goodies for us: the MiniScope. From their website:

An oscilloscope is one of the most commonly used measurement instruments used in the electronics industry. At the most fundamental level, an oscilloscope enables the variation of an electronic signal with time to be viewed as a graph. This means that waveforms can be readily displayed and analyzed.

The HiTechnic MiniScope is specially designed to work with the SuperPro board. It fits into a standard breadboard making it easy to use with testing new circuits.

Via: Twitter, Source: HiTechnic, image

Aug 30th: Mindsensors: Light Sensor Array (Coming Soon)

Xander also got us some juicy news about Mindsensor’s new Light Sensor array, which features 8 individual sensors to help you follow lines like you never have before. Read all about it at the Bot Bench source link below.

Via: Bot Bench Source: Mindsensors

MOCs

Aug 3rd: Lightplot

A very nice, very creative project here: it’s called lightplot, and it does exactly that. The robot shines a laser pointer onto a flat white wall, and a long exposure camera captures what it “draws”. See the source links for more information; especially check out the Vimeo one for the project’s awesome video.

Via: The NXT Step Source: rethinkfx, Ben Cowell Thomas (Vimeo), image

Aug 5th: Controlling your robot with a TV remote

Xander over at Bot Bench published a great story about how you can use your TV remote with a Sony PS2 Controller Interface from Mindsensors, and also included RobotC code so it’s easy to get started right away. See his video below for a demo:

SourceBot BenchXander Soldaat (YouTube)Mindsensors

Aug 6th: LEGO Mindstorms NXT Curiosity

After NASA’s Curiosity Rover successfully landed on Mars earlier this month, The NXT Step ran a story about Will Gorman and Doug Moran’s LEGO Mindstorms NXT Curiosity Rover. It is a very impressive thing to see, and it’s packed with some very cool functions. Check out the video below for a demo, and see the source links below for a lot more on the rover.

Via: The NXT Step Source: willgorman (YouTube)

Aug 6th: NXTified Rescue Helicopter

Yet another very nice NXTification from Anika Vuurzoon: the 9396 Rescue Helicopter. From the video description:

It can turn, tilt forward and backward, do all the original function and much more.

To learn more about the helicopter, see the video below and, as always, the source links.

ViaThe NXT Step SourceVuurzoon (YouTube)

Aug 8th: Mindstorms NXT Laser Cannon

R J McNamara brings us this very cool NXT Laser guided cannon. From his blog:

I was asked by my son to build a LEGO® Mindstorms NXT Sentinel Cannon for him to play with and take to school to show his friends. My initial thoughts was to build a LEGO Zamor equipped Cannon for the job. Upon reflection, I could see the Robot, and a couple of dozen Zamor Spheres leaving home for school, with only the Robot returning. I thought why not up-scale the Zamor Firing Mechanism and use Pin-Pong Balls as projectiles instead.

Source: R J McNamara

Aug 15th: New NXT X-Y Plotter

Another one from R J McNamara: a very nice X-Y plotter. It is a very impressive-looking device, and the write up on his blog is very detailed as well. Go check it out at the source link.

Source: R J McNamara, image

Aug 20th: Coltar, Lego Mindstorms NXT Guitar

A very creative project that “mixes art and science.” From the RobotC blog:

By mixing imagination with ingenuity, PhilippLens created the hybrid guitar using a LEGO Mindstorms NXT brick with a color sensor and two touch sensors (one on the Coltar itself, the other on the ‘pick’). Using the touch sensors to control chords and the color sensor to control which notes are being ‘strummed’ allows the Coltar to emit a surprisingly large range of notes.

Via: RobotC Blog Source: PhilippLens (YouTube)

Aug 25th: full Size LEGO Cart

:O was my initial reaction. This beast of a machine is capable of transporting a 40-kilo child! Hit the source links for more.

Via: The NXT Step Source

If you’d like your stuff featured here next month, or if you think there’s anything missing from this month’s post, please contact me on my Google+ or my Twitter (sending me a story does not guarantee that it will be in the post).





New from HiTechnic: a Barometric Sensor (via I’d Rather Be Building Robots)

17 07 2011

About to board, so I don’t have time to write up a post, so here’s a reblog of Xander’s post at I’d Rather Be Building Robots:

New from HiTechnic: a Barometric Sensor HiTechnic have released a new sensor: a barometric sensor that can also measure temperature! If you ever wanted to make your own weather station, then this is perfect for the job! It measures the pressure in 1/1000th of an inch of Mercury, which can easily be converted other units like Pascal and PSI. The temperature is measured in 1/10th degrees Celcius. I already have a driver and test program for it and I’ll be sure to release it very shortly … Read More

via I’d Rather Be Building Robots





HiTechnic Experimenter’s kit I2C output addresses

2 05 2011

I couldn’t find all of these addresses anywhere, so I tested them to see what pins (B0 – B5) they’d turn on. A white box means that that address is turned on, and a black box means it’s off. Thanks to Xander and bullestock for helping me complete this list:

The following image cannot be displayed: I2C output addresses on HiTechnic Experimenters Kit





Putting the HiTechnic Magnetic Field Sensor to the Test

20 01 2011

Since I received my HiTechnic magnetic field sensor, I’ve always wanted to put it to the test. In this post, I’ll discuss the sensor’s response time and it’s precision, to see if it can be used as angle sensor. These tests were inspired by a comment on mightor’s blog by Sparra Mc.

First, let’s look at the time it takes for the sensor to update its reading. The main part of the testing program is a 10-seconds loop with about four commands and no waiting, so the program runs through it thousands of times. The magnetic field sensor value is taken at the beginning of the loop, and then compared to the previous value. If the values are the same, nothing happens and the loop restarts. If they’re different, though, a variable holding the total amount of readings is increased by one. After the loop ends, this variable is divided by ten to get the readings per second. The experiment was repeated 25 times. These are the results:

HiTechnic Magnetic Sensor Readings per Second bar graphThese values average to about 325 readings per second, which is even more than HiTechnic specify of their website! So, the HiTechnic magnetic field sensor updates about every 3 mSecs.

Even though a low update time is important, precision matters, too. My second and last experiment focused on that. The program it runs on makes the motor (with magnet attached to it – the magnet was positioned to give the maximum possible value at the experiment’s start) run slowly, while taking a magnetic field reading every ten encoder ticks. That resulted in a total of 36 readings. The below graph shows those readings vs. the position (in degrees) the motor was in.

Motor Encoder vs Magnetic Field Sensor Value line graphThese values look precise enough, and, if the magnet was horizontal in the beginning (to give a 0 value), one could use it as a rotation sensor. The only problem being that the value gets negative, which might be confusing to program.

Overall, I think the HiTechnic magnetic field sensor is great and performs awesomely. With its precision it could be used for almost anything, including for (some suggestions from around the web):

  • distance measurement
  • communication
  • angle measurement
  • in-floor beacons for decision making
  • much more!

So, to anyone reading this, I would STRONGLY recommend buying the HiTechnic magnetic field sensor! More info:





Magnetic Field Sensor Grapher

16 01 2011

This program graphs magnetic field sensor values, keeping track of the maximum read value. The graph remembers 100 past values, which move to the left whenever there’s a new value (each 20 milliseconds), after which they’re forgotten. So, the graph shows values of up to two seconds ago. Furthermore, the scale of the graph is adjustable (by turning motor A), so it can adapt to different kinds of magnets. Here’s some screenshots (taken in RobotC  NXT remote screen):

Starting ScreenRegular graphingLess precise, bigger range graphingMore precise, smaller range graphing

The graphing program can easily be adjusted to work with different sensors including light, sound, touch and ultrasound.

More info:








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