Karlsson on the roof

thingiverse

Karlsson on the Roof is a beloved character created by Astrid Lindgren, who makes regular visits to the home of his seven-year-old little brother in Stockholm, Sweden. Karlsson's incredible ability to fly is made possible by a propeller on his back that he uses to soar through the air. To help kids dress up like their favorite flying friend, I designed a propeller pack that includes a backpack and button on the stomach. This DIY kit allows children to create their own Karlsson-inspired costume and have fun pretending to be just like him. You can find the propeller pack tutorial here: https://www.youtube.com/watch?v=k2u664KVVJc **Print Settings** * Printer Brand: Wanhao * Printer Model: Wanhao Duplicator i3 V2 * Resolution: 0.2000 mm * Infill: 35% or 60% (optional) **Notes** All parts were printed in PLA plastic. To ensure a smooth fit, I recommend using two processes or increasing the infill percentage to 60% for all layers. Additionally, use support material on the motor and arcade button lids. **Design Process** The propeller used in this design is based on this Thingiverse model: http://www.thingiverse.com/thing:7779. To create a more impressive effect, I enlarged it by 20% to achieve blades of approximately 12 cm from center. To complete the propeller pack, I designed several key components: 1. A shaft that fits perfectly with the propeller. 2. A lid to cover the shaft. 3. A box for the button on the stomach. 4. A compartment for the motor and electronics located on the back. **Electronics** The following components are required for this project: * A 5 x 7 cm DIY PCB * A 2.54mm Pinheader female * A red arcade button with lights (12V) * An XT-60 Connector * Silicon wire 22AWG * Bullet Crimp Connector * Female Crimp Spade connector * A step-down module adjustable to 5V * A step-down module for 5V to 3.3V * A 28BYJ-48 DC 5V motor that rotates the propeller slowly, ensuring kids' safety. * A 5mm to 8mm shaft coupler used to connect the motor with the shaft. * An ULN2003 Stepper Motor Driver * An ESP8266 - ESP12E module for motor control. * An ESP12E Adapter * A RC lithium battery (3S, 11.4V, 2200mA) **Software** The simple program to load into the ESP8266 is included in karlsson.ino. **Post-Printing Assembly** To assemble the propeller pack: 1. Glue the propeller with epoxy and attach the shaft, coupler, and motor. 2. Unpainted printed parts are shown below: * The shaft * Arcade push button box * Primed propeller * Raw printed motor box with lid 3. Paint all components according to your preference. Note: I removed foreign characters and reformatted the text to make it more readable while maintaining the original tone, voice, and phrasing.