He draws spirographs
thingiverse
Spirographics are typically crafted manually or through intricate designs. This small creation will captivate kids. One upper arm is connected to the shoulder via an M3 bolt and nut, preventing rotation. The pattern changes by inserting the M3 bolt of the connecting rod into one of four holes. It's essential that motors operate at different speeds. A 500 Ohms potentiometer should be added in series with each motor to enable speed adjustment. Two openings in the housing accommodate potentiometers and an on/off switch. To create the spinning design, use a CD/DVD as a template to cut paper and secure it to a round table using double-sided adhesive tape.
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