OTTO robot with WHEELS
List of parts:
Arduino NANO with I/O shield
Small female to female jumper wires
Futaba servo 9G continuous rotation x2
HC-SR04 Ultrasound sensor
MAX 7219 LED matrix
Nuts M3 x4
Screws M3x12mm x4
Powerbank (optional) or just use the USB for power the Arduino board.
I used a 3.7V 1200mAH LIPO and DC to DC booster
Check the OTTO Plus for connections as this is based on this, using D2 and D3 for the left and right wheel servo's.
The HC-SR04 Ultrasound sensor is not connected in the schematic; trig for pin 8 and echo for pin 9)
Code and libraries are :
For the programming:
Download & Install Arduino IDE:
This is still work in progress, I will continue to convert the bluetooth code for use with the Zowi app,
Choose which wheels are best suited for the servo horns you have.
You may need to clean up the servo holes in the side of the body.
Two large O-Rings are required for the wheel tyres, the diameter of the wheels are approx 56mm.
Otto with Wheels