LJBot 0.5 Raspberry Pi Robot

thingiverse

Human Version 0.5 of LJBot is designed to house the Raspberry Pi Model A+ or Zero. It also accommodates two 28BYJ-48 Stepper Motors with ULN2003 Drivers and a hr-sc04 or hy-srf05 ultrasonic distance sensor, specifically the srf05 being highly recommended. The steppers and drivers can be optionally replaced by a micro gear motor and dual h-bridge driver. Powering it is a cheap USB power bank that sits on top of the system. To assemble LJBot, four m3 bolts/nuts are required to secure the steppers in place, along with ten dupoint cables to hook everything together seamlessly. Since the Pi has only two 5V pins available, connect these directly to the motor drivers and either build a custom splitter or attach a male duopoint cable into the back of one of the female stepper motor ones. This configuration allows for efficient energy distribution within the system. You'll also want to add some tape, such as kapton or duct, between the drivers for added support. Additionally, connect a 1k resistor between the 5v echo pin of the ultrasonic module and the 3v3 GPIO on the Pi using another dupoint cable. To attach the rear wheel, consider using some 3mm fillament or a 3mm metal pin like mine; heat from a heat gun may help secure it if necessary. For python code, visit https://github.com/topshed/ZeroBot for helpful reference. On top of LJBot sits a removable ring that can accommodate a neopixel ring for customizable visual appeal.