We hadn't succeeded to complete the circuitry throughout the day so we had been researching and trying again and again.

We asked for help everywhere.

We discussed quite a lot of things and went over many principles.                                            And finally, we made a plan !

Going through the decided plan was much easier and then we had a working circuit !                 Here is a video explaining it.

https://youtu.be/OadWHdW6TIo