hi there i want to make a line follower with 4 wheels but only front two wheels will be controlled by the motors the back two wheels will be free can you help me with the circuit of this robot ..i need schema for it

 

you have to start and people on the forum including me will help you,

first you have to realize that you will need a micro controller. then you will need a way to sense the line.. maybe a photo transistor,, or an LDR... then you will need to control the 2 motors with a suitable driver..

so, to sumerize, you need

a sensor >> A micro controller >> A motor driver.

good luck, try to start some schematics, post them here and you will get a lot of help.

welcome to the forum

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Ibrahim Kamal
check my electronics and robotics page: http://www.ikalogic.com/

 

try this site http://mobots.solarbotics.net/dizzy.html, but its a dc motor. The sensor's circuit should be pretty much the same anyway

 

Please see link below you should be idea or making like with its
http://www.embedded-hardware.com/mak...robot-project/

 

thanx for all the helps i did it but changed the main idea; i used two wheels and i guess it is better this way

 

You dont need a microcontroller! Why make things too complicated? You could use a comparator (hint).

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Yeah, just You compare between each reciever sensor.

 

2 wheels and a free wheel would probably be enough

 

I agree. Microcontroller make things easier. Sure, you can always design things without it. But microcontroller is very versatile. These day most of them have build in comparitor, A-D convertor, timers, eeprom etc. You can do lots of things with just the microcontroller. In fact it's not making things complicated, it's easier and reduce hardware. Also, you may want to add features to your design later on. You can modify through software instead of redesigning most of the existing hardware.

 

*ALL WHO MUST KNOW, VOLTBOY IS NOT ME!!!*

I got a pm from 3v0 saying not to use another profile, which I have NOT!!!

I dont know who VOLTBOY is!!!

So dont ask me!

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IF YOU WANT TO HELP FINE IF NOT PLEASE DON"T PEE IN MY CHEERO'S

 

It's hard to keep track who you are and recognize you since you keep changing your avator. I mean at one time you were the mad scientise in "Return to the future", then you became the blood thirsty Bush, now a little robot bug, what's next?

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May the force be with you.


My project: Simple White Line Follower

http://au.youtube.com/watch?v=8Z_MmrdH4oc

http://i271.photobucket.com/albums/j...nefollower.jpg

 

What I did wrong??

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Use the Microcontroller Luke. Many PICs even have a pair of comparators...

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Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com/

 

you could use this simple schematics (without micro)

Attached Files

x-easysniffer.pdf (380.2 KB, 493 views)

 

There isn't a point responding to a thread when the OP has only 2 posts, each of which were a long time ago.

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IF YOU WANT TO HELP FINE IF NOT PLEASE DON"T PEE IN MY CHEERO'S