Here’s a great round up of the top 10 Arduino projects of 2019.

10. Secret Knock detecting Lock:
https://www.youtube.com/watch?v=zE5PGeh2K9k

9. Self balancing Robot
https://www.youtube.com/watch?v=I6z26LVu5y0&t=1s

8. DIY Vending Machine
https://www.youtube.com/watch?v=BHQBsswUeT0&t=21s

7. Coin Counter
https://www.youtube.com/watch?v=lH4qfGlK2Qk&t=79s

6. Ball and Plate PID Control
https://www.youtube.com/watch?v=Il646OVrq_o

5.Easter Egg Painter
https://www.youtube.com/watch?v=oB-a9g6yQhE&t=24s

4. DIY Time Machine Glove
https://www.youtube.com/watch?v=rj9L1_-AzMc

3. Multimeter Data Glass
https://www.youtube.com/watch?v=lkl6yVauCKg&t=29s

2. 3D Wire Bending Machine
https://www.youtube.com/watch?v=HPQbKTJPsU4

1. Wall-E Arduino
https://www.youtube.com/watch?v=VNRX5Xkz_00&t=1s