RobotRebels.org

Robot Projects => Rolling => Topic started by: Impala on March 06, 2017, 11:12:42 PM

Title: Ebot SL
Post by: Impala on March 06, 2017, 11:12:42 PM
Ebot SL - a decent cheap line follower kit robot. They make good gifts and prizes if you are in the need for them.



(http://i64.photobucket.com/albums/h164/_NEVER-AGAIN/Robot%20N%20Games/IMG_20170306_214017_zpsuyf3ll1d.jpg)

(http://i64.photobucket.com/albums/h164/_NEVER-AGAIN/Robot%20N%20Games/IMG_20170306_214258_zpsr5qukgo4.jpg)
Title: Re: Ebot SL
Post by: kingart3 on March 07, 2017, 10:52:30 PM
It's extremely clean looking. 

I am guessing no MCU, maybe just some kind of comparator circuit to guide it on its merry way? 

I could definitely see appropriately geeky kids getting a BLAST out of these.

              -Hal
Title: Re: Ebot SL
Post by: Impala on March 07, 2017, 11:03:43 PM
It's extremely clean looking. 

I am guessing no MCU, maybe just some kind of comparator circuit to guide it on its merry way? 

I could definitely see appropriately geeky kids getting a BLAST out of these.

              -Hal

Yeah they are cheap toys, but they are good quality for the price. Here's the circuit that controls them:

http://www.robotrebels.org/index.php?topic=694.0 (http://www.robotrebels.org/index.php?topic=694.0)
Title: Re: Ebot SL
Post by: kingart3 on March 08, 2017, 06:47:55 PM
Great thanks pointing out the schematic.  I have learned just about enough to follow it.  Very slick.  -Hal
Title: Re: Ebot SL
Post by: Impala on March 28, 2017, 05:11:25 AM
The kids did a Full Contact Line Following Comp with these robots. It was a fun time, though the action gets a bit slow when you get down to the last 2.

Title: Re: Ebot SL
Post by: erco on April 18, 2017, 04:51:59 PM
These kits are under $5 on Ebay: http://www.ebay.com/itm/252786280689

Stock units are slow and oscillate, I hacked 'em to speed things up.

Before & after: https://www.youtube.com/watch?v=3CVrul3pyJg

Thumbnail shows hack: https://www.youtube.com/watch?v=uJckB9PDNl0
Title: Re: Ebot SL
Post by: erco on April 20, 2017, 01:04:49 PM
Just built this similar-sized Bluetooth-controlled D2-6 robot. Line following is not as good as the $5 D2-1 after modding. It has two IR obstacle sensors. Bluetooth works from smartphone using tilt or pushbuttons. Just $12 from Banggood and easily hacked to change to your favorite processor. I'm adding a Picaxe 20M2.

d2-6.png
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Title: Re: Ebot SL
Post by: jinx on April 20, 2017, 02:35:54 PM
 what a battery brand "ultra fire".
Title: Re: Ebot SL
Post by: erco on April 20, 2017, 05:25:17 PM
Look closer. It's NOT Ultrafire, which is already a halfass brand. It's UitraFlrc, a bad knockoff of a halfass brand!
Title: Re: Ebot SL
Post by: jinx on April 21, 2017, 06:02:32 AM
lol the trick the mind plays when tired,,, sure it said ultrafire! at the time :P
Title: Re: Ebot SL
Post by: Impala on April 23, 2017, 01:06:27 PM
@erco

You should make a write up for your rewiring and share it online. I'm sure a lot of people would like to copy it.
Title: Re: Ebot SL
Post by: erco on April 23, 2017, 04:20:33 PM
@Impala: Good call, it will be written up in an upcoming SERVO magazine, see also my thread at http://forums.parallax.com/discussion/comment/1407107/#Comment_1407107


Title: Re: Ebot SL
Post by: Impala on April 23, 2017, 10:59:17 PM
In reply to the guy having problems on the Parallax forum link you shared. Of the dozen that I bought for the kids, I had to replace 3 of the comparator chips after I made the original post on this forum. I could not get them to adjust out and follow the line properly. But ebay sells 5 packs for a couple dollars, so its a quick fix. They seemed to half work, but not be failed in a traditional sense. Its a weird problem that I attributed to typical "made in China" quality control.
Title: Re: Ebot SL
Post by: erco on April 23, 2017, 11:53:12 PM
Thanks, I'll pass that info on.
Title: Re: Ebot SL
Post by: erco on April 25, 2017, 08:13:05 PM
Just started my D2-6 hack today and noticed the  kit is on sale for $11.19 at http://www.icstation.com/bluetooth-remote-control-smart-suite-tracking-kits-p-10171.html    for 6 more days if anyone "needs" a deal on one. Or two.
P1.jpg
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P2.jpg
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P3.jpg
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Title: Re: Ebot SL
Post by: erco on May 02, 2017, 01:01:46 PM
Easy peezy mod, this really is a very hackable bot. Traditional first maneuver is always a figure 8. We have a long-running Figure 8 challenge thread at  http://forums.parallax.com/discussion/138125/erco-s-figure-eight-challenge  Feel free to join in there, no rules just right.

Title: Re: Ebot SL
Post by: erco on July 26, 2017, 01:52:12 PM
Impala: Here's another mod your students may like for the $5 robot, using a 555 timer for everything. Very smooth driving (analog vs digital) but the turning radius isn't small yet.

Title: Re: Ebot SL
Post by: Impala on July 27, 2017, 01:25:29 AM
Cool
Title: Re: Ebot SL
Post by: erco on January 30, 2018, 07:51:34 PM
These kits are under $4 now. No excuses not to have several assembled to demo and a few kits to give to budding young roboteers.

https://www.ebay.com/itm/2WD-Smart-Car-Tracking-Robot-Car-Chassis-DIY-Kit-Reduction-Motor-Set-For-Arduino/172854089141

https://www.ebay.com/itm/D2-5-Intelligent-Tracking-Line-Car-DIY-Kit-Suite-TT-Motor-Electronic-Component-/192289152912
Title: Re: Ebot SL
Post by: erco on October 31, 2019, 04:27:36 PM
Price is $3.29 for 4+ units, free ship: https://www.ebay.com/itm/362780819611 Oh, and now Ebay has started charging sales tax, even on Chinese goods. THANKS TRUMP.