Otto DIY eXplorer car robot

OttoDIY eXplorer robot with 48:1 DC Motors

List of parts:

• I used a 3.7V 1200mAH LIPO and a new DC MOTOR driver NANO SHIELD PCB
• You can use a Arduino NANO with I/O shield and a L9110S H-bridge Dual driver
• Small female to female jumper wires
• Buzzer
• 2 x DAGU 48:1 DC Motors (yellow DC motors with right-angled gearboxes)
• HC-SR04 Ultrasound sensor module
• MAX 7219 LED matrix module
• 2 x Screws - small self tapping screws to secure PCB in place
• 4 x Screws - 3mm x 15mm screws with 3mm nuts (to secure castor and motor clamp in place)
• You can use a 3.7V 1200mAH LIPO and a 5 volt DC to DC booster
   

Wiring:

• The HC-SR04 Ultrasound sensor is connected (TRIG to pin 8 and ECHO to pin 9)
• The MAX 7219 LED matrix is connected (CLK to pin 11, DIN to pin 12, CS to pin 10)
• The BUZZER is connected (pin 13),
• The Left Motor PWM pin is pin 6,
• The Left Motor DIRECTION pin is pin 2,
• The Right Motor PWM pin is pin 5,
• The Right Motor DIRECTION pin is pin 4,

Printed with 3 perimeter shells and 2 top and bottom shells to give it some rigidity.

You will need to print TWO wheels, they should push onto the motor shaft and can be secured with a very small screw.

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