Hi recently I made the project which I wanted to make since childhood

Yes! A humanoid robot

I made it using lego

Building humanoid

Thankfully for this I got instructions. When you buy Lego Mindstorms NXT 2.0 you got development kit powered by LabView, with 3-4 robot models with building instructions. One of them is humanoid. I sad thankfully, because when you are building a vehicle, basicly you know how to build it, what are main parts, and how most of parts to assemble. When building humanoid there are some problems like static. You definetlly don’t want your robot to fall when he walks. Legs are actually main part. It is quite complex to satisfy statics requirements. Every leg contains one servo motor and a touch sensor. Also legs needs to have moving parts, so robot can walk. Third servo motor is used for torso movement and palm opening. It has quite complex logic how with one motor to move whole torso and open palm. If torso moves right, left palm is opened. If torso moves left, right palm is opened. Over one hand robot has color sensor, that is used for things that robot has in hand. Head is made using ultrasonic sensor. Main part of Torso is NXT brick.

Programming humanoid

When it is time for programming most of problems comes out. First problem is to make your robot walk. In most cases your robot won’t walk at all, but it will move it’s legs, dance or do some wierd steps, but in place. To make robot walk you need to put motors on 0,5 rotation difference in way that one motor is poped in front, and the other one is back. Then if you sent both motors to move on same speed, you will have movement. Second problem is turn. This problem I don’t have completly solved, but I have some turning. I just use one motor and one leg movement. It turns very slowly and unnaturally, but it turns. That is at the end most important. What my robot is programmed at it’s very first simple version is to check ball color at hand. If it is green it will start moving, and throw green ball away. If it sees some obstivle it will turn and continue moving, until it got red object in hand with sensor. Then it aligns motors on start position and stops. Here is short video how it performs.