Schematic Search:Light Seeking Robot(without microcontroller)

[Souper man]

I have been searching the site (google too), but i have been unable to find a simple light seeking robot. It can be any robot that is run without a lm386 and a microcontroller. Please help!

 

[bananasiong]

Isn't LM386 an audio amplifier? I think LDR can do this well.

 

[Gayan Soyza]

Light seeking!

If you using LDR it is good only to go forward and reverse. No turning possibilities. Even though you make left & right with 4 LDR's it’s very inaccurate.

If you using IR can think a bit more to turn the robot in any direction.

 

[Souper man]

well they use the LM386 in herbie circuits, which i awlays fry them, so i dont like using them.

I was thinking about using photodiodes instead of LDR. LDR are also called photoresistors. thats the term im more used to.

 

[JohnH]

Try searching for "Walter's Turtle". It is a light seeking robot built in the late 40's by William Grey Walter. I have a book (Pic Robotics by John Iovine) with a Pic based version. It has three wheels and two LDR's with a barrier strip between them so it can tell if the light source is on the right or left. The LDR's are mounted on the front turning wheel so the servo can turn the wheel and find the light source.

Just some thoughts, I hope it helps.

--John

 

[Souper man]

I was thinking, and i am willing to try somting new. I will be willing to use any robot that uses infrared for sensors.

 

[things]

you could just use 2 led's and wire them up to two transistors connected to the motors, but this is a bad way to do it if you want it to be precise

 

[Gayan Soyza]

He is not a 2 years old child to build ultra easy circuits.

You can see he is a Green Beret

 

[Souper man]

Try searching for "Walter's Turtle". It is a light seeking robot built in the late 40's by William Grey Walter. I have a book (Pic Robotics by John Iovine) with a Pic based version. It has three wheels and two LDR's with a barrier strip between them so it can tell if the light source is on the right or left. The LDR's are mounted on the front turning wheel so the servo can turn the wheel and find the light source.

Just some thoughts, I hope it helps.

--John

I still cant find a simple schemmy for a light seeking robot! and i searched for the turtle, and couldnt find it.

 

[dipeshkumar619]

light seeking robot

iwil be grateful to you if you provide me circuit daigram of light seeking robot .

 

[cr0sh]

I still cant find a simple schemmy for a light seeking robot! and i searched for the turtle, and couldnt find it.

If you can't find that using google, you really aren't trying hard enough. Walter's "turtles" are to robotics (and cybernetics) what the ENIAC is to computers; the prototypical piece of history that most people involved can point back to and say "THAT was the beginning!" (though for historical honesty, in the case of ENIAC at least, it wasn't).

William Grey Walter - Wikipedia, the free encyclopedia
**broken link removed**)
Michael Gasperi's Grey Walter Machina Speculatrix Page
Moravec Robot book figure
**broken link removed**

 

[3v0]

It has been 3 years since Souper man last posted to this thread. dipeshkumar619 is looking for similar.

EDIT:
Souper man is either in his last year of high school or will start collage this fall. He has been very active in First Robotics. Not quite the noob he was when he started this thread.

 

[Dr_Doggy]

how bout this??

**broken link removed**


or this!


**broken link removed**

 

[cr0sh]

It has been 3 years since Souper man last posted to this thread. dipeshkumar619 is looking for similar.

EDIT:
Souper man is either in his last year of high school or will start collage this fall. He has been very active in First Robotics. Not quite the noob he was when he started this thread.

Ooops - my apologies then; didn't see that - and it might explain why he couldn't find anything on the turtles...