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Petoi Bittle | A Palm-sized Robot Dog for STEM and Fun

Bring down the technical and cost barriers of dynamic quadruped robot to an open-source pet

Petoi Bittle is a tiny but powerful robot that can play tricks like real animals. We fine-tuned every bit to fit agile maneuverability into a palm-sized robot pet. You can bring Bittle to life by assembling its puzzle-like frame and downloading our demo codes on GitHub. You can also teach it new skills to win prizes in our community challenges. Bittle makes a perfect tool for learning, teaching, researching, or a surprising gift to impress your family and friends. Bittle is not a toy for small kids. We recommend parental guidance to appreciate its rich content and avoid damage or injury.

Evolving with an open-source gene, Bittle is an open platform to fuse multiple makers’ gadgets into one organic system. With our customized Arduino board coordinating all instinctive and sophisticated movements, you can clip on various sensors to bring in perception. You could also inject artificial intelligence capabilities by mounting a Raspberry Pi or other AI chips through wired/wireless connections.

Bittle is the second product of OpenCat, sibling of Nybble. Backed by a worldwide user group, you can find many tutorials and project ideas on the Internet. We make constant but tiny progresses every day. You can follow our social media (Instagram/Twitter @PetoiCamp) to get more frequent updates than newsletters. By posting on our forum, you can contribute to the community or simply make your wishes heard. We are always drawing the blueprint for futuristic robots! 

Bittle is a compact system of five major components: body frame, actuator, electronics, battery, and the software to coordinate all the hardware to perform varied tasks. 

Body frame

We designed Bittle’s interlocking frame as a 3D puzzle with very few screws involved. Most body parts are symmetric for simplicity and aesthetics.  

It’s a pleasure to assemble and disassemble Bittle for teaching or maintenance. On average, it takes about one hour to put together the body from scratch.

Each piece has gone through tens of iterations with 3D printing. We then use high strength injection-molded plastic to provide the best protection from collision and dust (it’s NOT waterproof!). In the stress tests, the assembled robot can take an adult’s stepping without breaking any components (do NOT try this at home!).  We also designed Bittle to be soft. Besides the elasticity of the material, the spring-loaded upper legs flatten the shock on joint servos to protect their gears. Bittle usually survives regular collisions. In the extreme cases, it will disintegrate at the designated “weak link in the chain”, which is easy and cheap to reinstall or replace.

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