It is no secret that you can try all kinds of fun projects with an Arduino. outaspaceman has posted a video an Arduino-controlled knife wielding tentacle. The Arduino controls the servo motor with the blink program. The developer sped up the interval on the blink program to 500ms complete this project:
Must see robots & drones:
The 'knife-wielding tentacle' Build. Full version
Good luck turning it off. More information about this project is available here.
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