Skip to main content

Sudoku on the NXT

By
Not exactly a robot (in that there are no motors), but Leon is showing off some great programming skills by cramming an entire Soduku engine into the NXT.  It displays the grid on the NXT screen and you use the NXT Brick buttons to navigate around and enter in the numbers.

The software has several levels of difficulty, and generates a completely random game every time.

From the article

So here’s how it works:
  1. The user selects a difficulty (the higher the difficulty, the less visible clues) using the left and right arrow keys and then clicks the orange button
  2. A completely random Sudoku is generated and displayed on the screen
  3. The arrow keys are used for navigating the grid: the left key moves the cursor over one spot to the left, and the right arrow key moves the cursor down one spot. If the user reaches a side/ corner, the next arrow click will bring the cursor to the other side of the playing field, as illustrated below:
  1. Clicking the square orange key when an editable cell is selected (“clue” cells aren’t editable) will increment the cell’s value by 1, unless its value is 9, in which case the cell will be reset to 0
  2. Clicking the rectangular gray key will check the user’s version of the sudoku against the answer key (a copy of the generated sudoku without the non-clue cells removed), and tell the user how many errors there are. If there aren’t any, a “You win!” message will appear and the program will be aborted; if there are errors (including un-solved cells), the user will be asked if he/ she wants the wrong cells reset — if yes, the program will clear these cells, if no, they’ll remain wrong and the user will return to the game

Leon describes the whole project in 4 separate posts, and it's a great read to see the process someone goes through when developing such a program.
Start here - http://worldofmindstorms.com/2012/07/19/sudoku-part-1/ and work your way through.
Source code is available on the last page.


Labels:

Popular posts from this blog

Celebrating MINDSTORMS with a Remix - Part 3

By Asha Seshan - ROBOTMAK3R
The ROBOTMAK3RS continued their celebration of the 25th Anniversary of MINDSTORMS through these Fall and Winter remix projects. Each ROBOTMAK3R was tasked with selecting one LEGO set of their choice and combining it with a MINDSTORMS set. Below are the five amazing models they came up with. Braill3 by Jerry Nicholls Braill3 is an EV3-based LEGO Braille bricks reader. This robot uses its fingertip, made from three touch switches, to read messages written using the LEGO Braille bricks and will speak out what it detected. If it sees a simple maths problem it will attempt to solve it and give the answer as well. To learn more about the process of creating this machine, read Jerry's blog . Braill3 can be viewed here . Set Review: The Braille Bricks set is well thought out. The ratios of the letters is suitable for general use and the addition of some punctuation and arithmetic operators is excellent. There is a card showing what bricks there are and their quantities, but no form of sort...
Read more

Celebrating MINDSTORMS with a Remix - Part 2

By Asha Seshan - ROBOTMAK3R
The ROBOTMAK3RS continued their celebration of the 25th Anniversary of MINDSTORMS through these summer and fall remix projects. Each ROBOTMAK3R was tasked with selecting one LEGO set of their choice and combining it with a MINDSTORMS set. Below are the five amazing models they came up with. Remote controlled material handle r by Jozua van Ravenhorst (aka Mr Jo) This remix combines the LEGO Technic Material Handler (42144) with MINDSTORMS EV3 (31313) It uses the power of pneumatic cylinders to move objects around. By using a bluetooth remote control, very precise movements can be made with this model. Touch sensors in the base chassis prevent the turret twisting the cables that go through the turntable to much. The program has several protections to prevent over pressurizing the system for each of the 3 individual pumps and valves that control the 2 booms and claws. The real version of this machine is mostly used in waste material sites to bring the material to machines that sort and...
Read more

Celebrating 25 Years of MINDSTORMS

By Asha Seshan - ROBOTMAK3R
In celebration of the 25th Anniversary of MINDSTORMS, we take a trip through history. Please also visit ROBOTMAK3RS Community every week as we highlight different projects all through 2023 in celebration of the anniversary. Some of the early history is based on the content shared by  Coder Shah  in our  MINDSTORMS EV3 Community Group . Some of the text and links may have been edited from his original posts for consistency and clarity.  1984 - Kjeld Kirk Kristiansen watched a TV program called "Talking Turtle," where MIT professor Seymour Papert demonstrated how children could control robot "turtles" using LOGO, a programming language he developed. 1988 - The collaboration between MIT and LEGO resulted in LEGO TC Logo in 1988, which allowed students to control LEGO models using computer commands. The video shows Papert demonstrating TC Logo. 1990 - LEGO TC Logo was hampered since the robots you built had to be tethered to a personal computer. LEGO and MIT...
Read more