Let's Make Robots!


Picks up objects(bottles) that comes in its way

UPDATE : video uploaded . In the video the robot picks up bottle as well as avoids an object which cannot be picked.

It uses 3 sensors i.e. 1 SRF05 and 2 GP2D12 to detect objects and decide whether the object should be picked up or it should be avoided.

GP2D12 were not stable enough so i soldered 50uF capacitors between the ground and Vcc

I used a 10 RPM Dc gear motor for the arm. It gives around 8-9 Kg of torque at 9V

For using this motor i used a  L293D motor driver other than the one in main board and made connections on the breadboard. Since i didn't had any of the digital outputs left i used the digital inputs and converted them to digital outputs for controlling the arm motor

The gripper is homemade 

The three sensors

All the wire mess on its back

Top view

Thanks for your Support !

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I like it. Can't wait to see a video of it in action!

wow! great job

thanks phoz

Where did you get ahold of those plastic gears and how did you fasten them to the servo?

i used a small pinion gear and glued it at the servo output and that pinion gear is geared with one of the large gears

so when i program the servo the pinion gear rotates thus rotating the large gears.

and i bought those plastic gears from a store website in my country..

Hey, nice robot! 

And very good grip. It seems simple but very effective.



Thanks :)

"The only problem i have to deal with is that the robot is not turning properly maybe. I think its because of its weight. Anyway i'll figure it out someday."

Hello, I've built a number of bots with these Tamiya duel motor/track setups. They have 3 ratio's you can set. On my drum robot I had to use the lowest set and replace the motors with these: http://www.pololu.com/catalog/product/604

Just trying to help ;-)

The manual(page) i got with tamiya twin gearbox shows that only two gear ratios can be used with it.

its like 58:1 and 203:1.I used 203:1 but still no success..

I'm just trying to help :-)

there's 2 versions of these gear boxes, one has 3 ratio's, the other 2.

Either way you can upgrade the motors for more power, the link I sent before are the ones I use.

Solarbotics and Pololu have another version (if your motorcontroller can handle it) thats A LOT more powerful, see the chart http://solarbotics.com/assets/datasheets/592.gif

here's a link to buy them at http://solarbotics.com/products/rm2/resources/