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This Arduino-controlled robot leaves messages in the sand

Arduino TeamJune 22nd, 2020

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Ivan Miranda has come up with a novel method for drawing messages in the sand, using a tread assembly that prints as it travels along the beach.

The robot uses a length of square tubing to connect a pair of half tanks, with 50 SG90 micro servos spaced out on the bottom. As it pulls itself, the motors are controlled with a total of three Arduino Mega boards, intermittently extending into the sand. This creates lines that combine to form individual letters.

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You can see the build process in the video below, including his initial trial at around the 11:00 mark. This is actually Miranda’s second attempt at a “beach drawer,” and his first version, which uses a much different technique is seen here.

Source: Arduino Blog