Prasath:  Continue from previous project, I need to modify and make it move again by replacing the rubber bands with spur gears . .

With the solid connection between driver (i.e. Input gear) and follower (i.e. Output gear), the slippage can be greatly reduced.

Xian Hang:  Already done so many adjustments. Hope it's correct this time. 

Cyrus:  Checking the logical flow of configuring the Day, Month and Year of this digital calendar program.

Yee Hang:  😀 I got a chance to use and fix an electric motor to my sweeper . .

Yee Hang:  My modified version of sweeper.

Sanjiv:  Is it correct ? 🤔

Many can't move it at the first time.

🤭

✔️Just Do it

Sanjiv:  This is not an ordinary 4 wheels-car as I built before. In contrast, it involves in energy conversion while it's moving forward.

Lucas:  😅Can't separate these two building elements. They are tightly attached to each other. 

Harry:  With the help of the transistor (NPN) and programming, this DC motor can be controlled and switched On and Off conveniently at a preferred interval of 🕐.

Zhan Feng:  I've been doing this array programming test since last month and hope🙏🏻 to complete it next week . .

✨✨