Half Scale Robie Junior

thingiverse

Update: the castor STL file was scaled incorrectly, it was 10 times too large. I reuploaded it on September 12, 2019. Sorry for any inconvenience. This is my design of a half-scale Robie Junior. The Robie Junior was a robot toy sold by Radio Shack in the 80s. The original had remote controlled and autonomous modes, but mine only has remote control mode. This is not an exact copy; I designed it around an 80mm clear Christmas tree ornament available on eBay, which I purchased at Hobby Lobby. I designed it so that I wouldn't have to cut into the clear globe. It doesn't have the front bumper switch or switches in the arms like the original. Also, it doesn't talk like the original Robie Junior. The two N20 gearmotors are controlled by an Arduino Pro Mini driving an L9110S H-bridge module. The gearmotors could be 60 or 100 RPM. It has a TSOP4838 IR receiver in the dome to receive signals from a universal remote sending Sony 12-bit VCR codes. It can also be controlled by the Attiny85-based remote I built for another project. The electronics in this design are similar to my previous design: https://www.thingiverse.com/thing:3102186 An Attiny-based IR remote that works with this robot is available here: https://www.thingiverse.com/thing:3566978 Just like the Silent Running bot, the power comes from a 2600mAh power bank. For this design, you have to desolder the USB connector from the charging board; that's definitely the hardest part of the build. Since there is no fuse in the circuit, be careful with the wiring to avoid shorts. The circuit connections are shown at the end of the video. These parts need to be printed with supports: * btm_upper.stl * main_body.stl * new_dome.stl My video: https://youtu.be/4uI4PRgIKW4 Parts I used: * 10mm LEDs for the eyes * 2600mAh power bank * 3mm screws * 6mm magnets * L9110S dual H-bridge: https://www.banggood.com/2Pcs-L9110S-H-Bridge-Stepper-Motor-Dual-DC-Driver-Controller-Module-p-944585.html * Slide switch: https://www.banggood.com/10Pcs-Black-Mini-Size-SPDT-Slide-Switches-On-Off-100V-2A-DIY-Material-p-1011746.html * Arduino Pro Mini: https://www.banggood.com/3Pcs-ATMEGA328-328p-5V-16MHz-Arduino-Compatible-Nano-Size-Module-Board-p-1006451.html * TSOP4838 IR receiver: https://www.banggood.com/5Pcs-IR-Receiver-Infrared-Radiation-Module-38KHz-TSOP4838-DIP-3-p-945168.html