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Analog PID line follower
In his blog post, Will Moore shows off his sleek line follower that uses an analog circuit for the PID control. The circuit is made from passive components and operational amplifiers, and the PID constants can be tuned with the potentiometers on the top. The build uses a pair of Pololu 50:1 micro metal gearmotors and motor brackets.
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For more details, including schematics, performance analysis, and an additional video, see the blog post.
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