Simple White Line Follower(2) - Electronic Circuits Projects Diagrams Free

Wingmax · 30th April 2008, 02:21 PM

Bottom view. Only 2 LEDs and 2 LDRs are used. The chassis was from an old PC mouse.

Top view. Motors, gear box and chassis.

Main PCB and electronics components. Major components are P16F684 and L293D. That's why it's called Simple Line Follower. Speed, sensitivity and differential motors drive can be software adjusted.

Programming/ development stage.

Final product.

Please see it in action:

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

Or

http://s271.photobucket.com/albums/j...nt=Testrun.flv

It still needs improvement. I want it to go faster especially going around curves. I also want to run it on a more difficult track.

blueroomelectronics · 30th April 2008, 04:32 PM

Looks great, nice use of an old mouse too. To go faster you could change the gear ratio with the dual gearbox. What sensors did you use for the line followers?

**Nigel Goodwin** · 30th April 2008, 06:27 PM

Yes, looks really good, very impressive.

zanes · 30th April 2008, 06:29 PM

Looks like an LDR/LED combo to me.

Torben · 30th April 2008, 08:18 PM

That's a great-looking little unit! Good job.

Torben

Hank Fletcher · 1st May 2008, 04:50 AM

Awesome! Very well done.

Wingmax · 1st May 2008, 12:31 PM

Thanks for the nice comments.

The sensors are just ordinary LDR. The two transmitter LEDs are high intensity LED. They draw about the same current as the ordinary LED but are a lot brighter. I also use ADC to adjust motor speed. The more light received from the LDR the slower the corresponding motor speed.

The gear ratio I'm using now is 38.2:1, which is the second lowest gear ratio. I did try the lowest ratio but it's actually slower when the wheels touch the floor. I think it's because the wheels are bit too big and thick ( but look nice

), which put on too much load on the small motors. So when the gear was on lowest ratio, the wheels spin faster before they touch the floor. But as soon as they touch the floor, they slow right down.

zanes · 1st May 2008, 01:56 PM

You've got your ratio terminology confused, it's the second highest gear ratio.

30th April 2008, 02:21 PM	(permalink)
Wingmax Experienced Member	Simple White Line Follower(2) Bottom view. Only 2 LEDs and 2 LDRs are used. The chassis was from an old PC mouse. Top view. Motors, gear box and chassis. Main PCB and electronics components. Major components are P16F684 and L293D. That's why it's called Simple Line Follower. Speed, sensitivity and differential motors drive can be software adjusted. Programming/ development stage. Final product. Please see it in action: http://au.youtube.com/watch?v=8Z_MmrdH4oc Or http://s271.photobucket.com/albums/j...nt=Testrun.flv It still needs improvement. I want it to go faster especially going around curves. I also want to run it on a more difficult track. __________________ 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 Last edited by Wingmax; 3rd May 2008 at 11:15 AM.

30th April 2008, 04:32 PM	(permalink)
blueroomelectronics Experienced Member Blog Entries: 4	Looks great, nice use of an old mouse too. To go faster you could change the gear ratio with the dual gearbox. What sensors did you use for the line followers? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

30th April 2008, 06:27 PM	(permalink)
Nigel Goodwin Super Moderator	Yes, looks really good, very impressive. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

1st May 2008, 12:31 PM	(permalink)
Wingmax Experienced Member	Thanks for the nice comments. The sensors are just ordinary LDR. The two transmitter LEDs are high intensity LED. They draw about the same current as the ordinary LED but are a lot brighter. I also use ADC to adjust motor speed. The more light received from the LDR the slower the corresponding motor speed. The gear ratio I'm using now is 38.2:1, which is the second lowest gear ratio. I did try the lowest ratio but it's actually slower when the wheels touch the floor. I think it's because the wheels are bit too big and thick ( but look nice ), which put on too much load on the small motors. So when the gear was on lowest ratio, the wheels spin faster before they touch the floor. But as soon as they touch the floor, they slow right down. __________________ 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

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30th April 2008, 06:29 PM	(permalink)
zanes Experienced Member	Looks like an LDR/LED combo to me.

30th April 2008, 08:18 PM	(permalink)
Torben Experienced Member	That's a great-looking little unit! Good job. Torben

1st May 2008, 04:50 AM	(permalink)
Hank Fletcher Experienced Member	Awesome! Very well done.

1st May 2008, 01:56 PM	(permalink)
zanes Experienced Member	You've got your ratio terminology confused, it's the second highest gear ratio.

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