Schematic Search:Light Seeking Robot(without microcontroller) - Electronic Circuits Projects Diagrams Free

15th May 2007, 01:48 AM

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 · 15th May 2007, 02:04 AM

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

Gayan Soyza · 15th May 2007, 03:03 AM

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.

15th May 2007, 07:02 PM

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 · 15th May 2007, 09:38 PM

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

15th May 2007, 10:08 PM

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 · 16th May 2007, 08:40 AM

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 · 16th May 2007, 08:47 AM

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

You can see he is a Green Beret

16th May 2007, 07:17 PM

Quote:

Originally Posted by 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

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

15th May 2007, 01:48 AM	(permalink)
Souper man	Schematic Search:Light Seeking Robot(without microcontroller) 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!

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15th May 2007, 02:04 AM	(permalink)
bananasiong	Isn't LM386 an audio amplifier? I think LDR can do this well. __________________ Superman returns..

15th May 2007, 03:03 AM	(permalink)
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. __________________ Gayan My Website http://gsmicro.blogspot.com/ Last edited by Gayan Soyza; 15th May 2007 at 03:05 AM.

15th May 2007, 07:02 PM	(permalink)
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.

15th May 2007, 09:38 PM	(permalink)
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

15th May 2007, 10:08 PM	(permalink)
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.

16th May 2007, 08:40 AM	(permalink)
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 __________________ The 3 laws of science.... 1. If it smells bad, It's chemistry. 2. If it's mushy, It's biology. 3. If it doesn't work, It's physics. www.laserpointerforums.com A forum for disscusion of lasers and laser shows! www.laserchat.org IRC chat for laser and electronic related stuff.

16th May 2007, 08:47 AM	(permalink)
Gayan Soyza	He is not a 2 years old child to build ultra easy circuits. You can see he is a Green Beret __________________ Gayan My Website http://gsmicro.blogspot.com/