This 3D printed robot is controlled by arduino, programmed to avoid obstacle using an ultrasonic sensor #Arduino #Robot #ultrasonicsensor https://youtu.be/eR283xyLk98 List of parts: Servo MG90S - http://s.click.aliexpress.com/e/_dSTUmGQ L298 mini Driver - http://s.click.aliexpress.com/e/_dUH6YTj Arduino Nano - http://s.click.aliexpress.com/e/_d7EFcFd Ultrasonic sensor - http://s.click.aliexpress.com/e/_dYUXR5d Battery – NiCd 4.8V Wheels – http://s.click.aliexpress.com/e/_dVuzQCn Motor – 100 RPM @ 6 Volts - http://s.click.aliexpress.com/e/_dVS6Jil LEDs - 5 mm -Red, Green & Yellow 3x resistor 1K You can try different bolt sizes For Arduino codes, MP3 files and much more, please support me on Patreon: http://www.patreon.com/HendrikxWorkshop Thanks, Enjoy it!