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My Goal was to come up with a design where all the speciality parts could be ordered for under $20US. The bill of matirels (BOM) looks like this: 2 ea 9g CR Servos 2 ea Wheels for the Servos 1 ea 4xAAA battery box with switch 1 ea SR-04 ultrasonic range sensor 1 ea Arduino IDE compatable ATTINY85 based controller board. Such as a Digispark, Iteaduino or any one of the similar devices. All the speciality parts come to just over $21 from Robotshop. depending on how much effort ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/g-e-a-r-2