Wildman

Tried to fix it, but no solutions so far. Wildman Edit: Made some adjustments, but now all the light sensors (4) are blinking and he reacts now on the flash light. But he doesn't follow it now, he makes strange movements. See link for the software: https://sourceforge.net/apps/phpbb/mindboards/download/file.php?id=178 I don't think this approach works. Or does anyone knows a solution/see a error?

I have reconnect some / connect some I forgot :O But doesn't work. Same problems. Thanks, Wildman Updated program: https://sourceforge.net/apps/phpbb/mindboards/download/file.php?id=172

I'm trying to improve the driving angle, so I started with some adding values etc. The software program (again to big to put it in attachments): https://sourceforge.net/apps/phpbb/mindboards/download/file.php?id=172 But it doesn't work any more. Only light sensor 1 (south) does react on a flash light (light sensor 1 is blinking, I don't know why). All the other light sensors (2/3/4 > East/North/West) doesn't react on the flash light. The robot is just driving straight on now. Anyone can help me ? I think I made a stupid fault somewhere. Thanks, Wildman

The program what I now use is: https://sourceforge.net/apps/phpbb/mindboards/download/file.php?id=170 A reply with regard to the deviation problem: Is this a good solution, or does I need to continue with searching/making a other solution ? (Loopy used 2 light sensors). Thanks, Wildman His attachments, where to big so I post some links: https://sourceforge.net/apps/phpbb/mindboards/download/file.php?id=167 https://sourceforge.net/apps/phpbb/mindboards/download/file.php?id=166

I will do that I'm testing/editing now some bit. Thanks, Wildman

Thank you !!! I did a test with your program and made some (little) changes. It works quite well. I have tested it with a flash light. The robot follows my flash light almost perfect now. (Tested with 4 sensors). I will make some adjustments later on. I will post a small video, when it's finished / it works. If you have further suggestions / tips / or just want to chat, please mail me (wildman31@gmail.com) or post reply Thank you again!, Wildman

Thank you all, for your replies. I'm watching now some tutorials + programming some bit.

Thank you very much! I have made a list what the robot needs to do: Step 1: Start the program, by pressing a button on the Lego Mindstorms (done) Step 2: The robot needs to measure the light intensity (from the four Lego light sensors, which are in 90 degrees of each other) (trying, but stuck) Step 3: The robot needs to compare the measured values. (trying, but stuck how to compare all the four sensors. I can't find where you can compare four values.) Step 4: The robot needs to find the highest sensor value. (trying, but stuck how to find the highest value) Step 5: Drive toward the light source. Step 6: Keep measuring and compare the measured sensor values. Step 7: If the new sensor values are higher then the old (highest) sensor value adjust the direction. If the new sensor values are lower then the old (highest) sensor value keep driving the same direction. Step 8: Stop the program, by pressing a button on the Lego Mindstorms (done) I'm trying to achieve that. Still in progress. Thanks, Wildman

I have made a screen shot of the program (it's in Dutch). http://img227.imageshack.us/img227/9821/legomindstormsnxtprogra.jpg I don't know which one I need to use. Do I need to compare them separately and how can I compare more then 2 sensors at the same time? Or do I need a circuit? Or... ? Some suggestions/tips? ;) Thanks, Wildman @Legolijntje I will contact them. Thanks !

Thanks for your comment. Some bits of the article will help. unfortunately that Lego robot, is a old version. So programming is different now (same basics I think, but other specifications). I´m using Lego Mindstorms NXT ( http://en.wikipedia.org/wiki/Lego_Mindstorms ) with the programming language provided: Lego Mindstorms NXT. Thanks, Wildman

Thanks, that will help a bit. It's unfortunately a other robot which he used. I'm using Lego Mindstorms NXT with the software it provided. I'm trying to make the robot measure and compare the results. But I'm stuck at the moment :P Thanks, Wildman

I did consider that. But with 4 sensors you will have a much better (continual) measure. If you let the robot rotate, it costs time. I want a continual measure / adjustment to the direction with the highest light intensity. Anyone can help me with that please ? Thanks.

Hello, I'm a student from The Netherlands. I'm in Gymnasium 6 (VWO 6) and have a assignment. I'm making a Lego Mindstorms NXT which is working on solar energy. The robot needs to detect the highest light source and drive to it so the robot can "recharge" himself. We have equipped 3 solar panels on the robot and are using 4 Lego Mindstorms Light sensors. But I have a problem. I don't know exactly how to program this. How can the robot detect the highest light source and drive to it? I think the program needs to compare the 4 Lego light sensors and go to the direction where the robot measures the highest light intensity. But how? I hope somebody can help me. Thanks, Wildman (wildman31@gmail.com)