Training the Dragon!!!!!!!!!!!!!!!

Good morning,
Yes it is very true that now our quadrotor is able to understand us and follow our instructions.But still its very tough for that Quadrotor to stabilise in the mid-air.

So we are now checking the Gyroscope signals and output angles to make it a stabilized one...

This quadrotor is really very fast and it lifts up with very high thrust.Testing and stabilizing this Quadrotor is like training the dragon......

Our Quadrotor Hovering

Assembling the blades of Quadrotor helicopter






Our quadrotor hovering on the platform of Technido.In the above video we have used only near about 30% of the total speed of our quadrotor ,so it is only hovering.The another reason for not increasing the speed of the quadrotor at once is that our quadrotor is not balanced right now.So if we had increased the speed ,the machine could have turned upside down and fell on the ground.Now Balancing this quadrotor is our next big and challenging task.

We are very happy because today we not only was able to hover this quad ,but also we were able to rotate it clockwise and counterclockwise.

Again we would like to thanks Mr. Siddharth dev sir for ,the time they given to us and the project.

Thanks a lot God for all the ideas!!!!!!!!!!!!!

Our quadrotor rotating clockwise and Counter Clockwise

Our quadrotor helicopter trying to hover and rotating clockwise and counter-clockwise according to our instructions....

Controling all four motors of the quadrotor with the wireless remote

Gaurav(sky blue tshirt) ,Mayank(centre),Lokesh(chequed shirt) making the connections of wires of our quadrotor helicopter for the testing of the Quadrotor @ the Technido Indore.


Our dude the Gaurav Gupta "Joy Lobo" showing the quadrotor helicopter....

Lokesh "The programmer" is here with lovely attitude showing the quadrotor helicopter...

Lokendra checking the signals @ CRO,the most important equipment for the testing of the signals that we transmitt and receive.

Gaurav ,Mayank(me) and Lokesh showing our quadrotor helicopter




Lokendra looking @ our quadrotor helicopter and seems very happy as this new Quadrotor the latest model started working very well.....


Thanks a lot God and all the friends for the good wishes because of which the project started working.
We are very Thankful to all people who have guided us directly or indirectly for this Quadrotor helicopter.

Hoping very best for the next steps

Mayank Gupta

pin mapping diagram of atmega 8

pin mapping diagram of atmega 168

Analysis of PWM signals on CRO coming out of the receiver of Quadrotor Helicopter

The receiver module of our quadrotor helicopter containing six channels ,i.e. we can transmit and receive six signals simultaneously.The Pwm signals comes out of these receiver module which changes according to the movement of the joystick(analog stick) available in the transmitter.If we move the stick of channel 1 in the transmitter then we get change in the signals of the first channel of the receiver,same is the case with other channels of the receiver.......

Tramsmitter-receiver module.This trasmitter trasmits signals @2.4 Ghz.The range of this trasmitter is more than 100 metres ,cant say more than that because we have checked only upto 100 meters.The range could be much more than that.It is a four channel trasmitter.This transmitter works on GFSK technique with FM modulation.

In the above picture Lokendra Tomar giving power to the receiver module by connecting that to ESC .Receiver is not directly connected to battery because the power requirement of receiver is very less and it is given by inbuilt BEC of the ESC (Electronic speed controller),so ESC is connected to the battery and then receiver is connected to the ESC (for circuit/connection diagram :look @ the previous post typical connection diagram of receiver and ESC).After the conection one of the channel output of the receiver is given to the input of the CRO.

Lokesh parmar then calibrated the CRO according to the signal we were receiving on the CRO.CRO was self tested by Joshi sir(Lab technician),before we started working.After Changing the time divisions and the amplitude and shifting the wave on CRO,we got the waveform that we were trying to look for.Its an On-off pulse with an maximum voltage of about 3.5 volts and the On(High) timing of the pulse is 20 ms and Off(low) time 4 ms.So the frequency of pulse is approximately 40 Hz..
Look @ the anove pulseon CRO, how smooth and clear it is.Off(low) time in the above pulse is very low but even then you can easily observe that.

On moving the Analog Stick(joystick ) of channel 1 ,the pulses of channel 1 changes.When we move the analog stick upward ,the width of the ON time increase in accordance to the movement of stick,when we move analog stick downward the OFF width of the pulse increases.But the overall width of the pulse remained the same.


we looking @ the varying pulse on moving the analog stick and analysing the signals and calculating the results.

After the whole testing was done we had tea as always ,beacause
"Yaar ab itti testing ke baad ek chai to banti hai.................. "

This whole testing was done in the lab of our college IES-IPS Academy.Sorry but i forgot what was the name of the lab,the only thing we need was a CRO.

Mayank Gupta