Mobile Controlled robot

I’m seeing my blog after days of work. I’m just over with a very busy schedule with my works and projects. This week was very eventfull participating in Kurukshetra “The Anna University techfest”.

There were three contests : Sumo Wrestling , Micromouse ,Triathlon
I came across few bots that i’l talk about here for the sumo wrestling

Sumo Wrestling

This is as simple as fighting with the other robot. maximum torque with the maximum wieght wins the game.Its all pretty simple if you have some high tech mechanism to tackle oponent hits or his push. But finally it boils down to how much force your bot has.The sheer power matters.
But not going into the details of mechanical design and the power and the rating and motors , I was more interested in few robots i came accross on the areana which had cool control techniques. Two more specific ones were a mobile controlled robot and another self designed priority encoder based remote control.

Mobile Controlled Robot

This is the sumo robot that was controlled by mobile phone. Now this is a pretty good way to utilize the available resources to control your robot. All you have to do is call the mobile phone from some number to the one located on the robot.Then keep pressing the keys from the mobile you called and make therobot move. By: 1)Ragavendra Prasad 2)Rahul 3)Ravitej 4)Vanmsi krishna From VIT college of engineering How Does It Work ?

They used a 100 RPM motor and a metal chassis as seen in the picture. Now how to control a robot using mobile phone is what we are worried about . Now have you noticed that when someone calls you and he clicks on his keypad you’l recieve a tone.If you were more concious of that , did u note that each key pressed has a different tone.

Lo you’ve got a transmitter and a receiver. Now all you’ve got to do is decode the carious tones to detect the different switched pressed.These guys used a DTMF tone decoder.
HT9170 is the IC used to peroform tone decoding . This Ic gives out 4 bits based on the tones received. once we obtain the digitl data the following process is just a cakewalk. Use a Microcontroller and decode based on those bit combinations received give appropriate signals to the motors. Now that’s sounds really cool and simple.

Now how do you run the motor?? what! you still don get it? just make a call to the robot and make it move 🙂

That was good work right .