The Kondo Kagaku KHR-3 (also known as KHR-3HV) is a popular remote-control humanoid robot kit released in 2009, designed primarily for hobbyists and advanced educational purposes. It features a compact and lightweight design with dimensions of approximately 401×194×129 mm (15.8×7.65×5.07 inches) and weighs about 1.5 kg with battery. The robot is built with durable materials such as aluminum, polycarbonate, ABS plastic, and glass fiber, providing a sturdy frame that can withstand shocks and recover smoothly from falls. The KHR-3HV is equipped with 17 servos initially, plus 5 dummy servos that can be replaced to reach a total of 22 degrees of freedom (DOF), allowing for human-like movements including walking, dancing, somersaults, and backflips. It uses the RCB-4HV microcontroller board capable of controlling up to 35 serial servos with ICS 3.0 communication protocol, which enables fast and reliable servo control. The robot is powered by a 10.8V 800mAh nickel-metal hydride battery that charges within an hour. Its versatility and modularity make it suitable for robot sumo competitions, synchronized dance, gymnastics, and robotics education.
