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The servo motor turns back and forth. If something comes within 40cm of the beam, then the servo motor stops, the on-board buzzer starts to beep, and the LCD reads “OBJECT DETECTED”.
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How to make a servo tester using Attiny85 micro chip
Making a servo tester using an Attiny85 micro chip, Attiny45 also works for this project. This diy servo tester is as good as ...
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