Welcome to the first lesson of OSOYOO 2WD Robot Car Starter Kit!
In this “Hello World” version lesson, we will install the most important framework of the robot car and program the car to do some simple movements. If you have passed the test movement of this lesson, it means Arduino, motor control module, motors, batteries, chassis and wire connections between these parts are all functioning well.
As your experiments in future lessons are all based on frame work of Lesson 1, it is very important to
test the installation and sample code in this Lesson properly.
Parts and Devices
Device
Picture
Qty.
Accessories
OSOYOO UNO R3(fully compatible with Arduino UNO R3)
1
M3*6 Plastic Screw x 3M3 Plastic Nut x 4
M3*5+6 Plastic Pillar x 4
OSOYOO Model-X Motor Driver Module
1
M3*6 Plastic Screw x 4M3 Plastic Nut x 4
M3*5+6 Plastic Pillar x 4
Sensor Shield V5.0 for Arduino UNO
1
Car Chassis
1
Motors with wires
2
Wheels
2
Universal Wheel
1
M3*10 Double Pass Copper Pillar x 4M3*5 Screw x 8
18650 Battery Box (Battery is not include,
Battery Height ≤ 67 mm)
1
M3*10 Screw x 4M3*10 Nut x 4
Metal Motor Holders
2
DC Power Connector
1
Phillips Screwdriver
1
Slot Type Screwdriver
1
40pin 10cm Female to Female Cable
1
Cable Tie
20
Hardware Installation
Remove the protective film from the chassis.
Please pay attention:
The chassis has front side and back side, please pay attention to the front side as the picture shows:
1 Motors
Accessories:
Motor Holder Set x2
Install 2 motors on the chassis with the motor holders
2 Universal Wheel and Wheels
Accessories:
M3*10 Double Pass Copper Pillar x 4
M3*5 Screw x 8
Install the wheel on the chassis with M3*10 Double Pass Copper Pillars and M3*5 Screws(please install the Copper Pillar on the chassis first), then install the two wheels onto the motors.
3 Battery Box
Accessories:
M3*10 Screw x 4
M3*10 Nut x 4
Fixed the battery box on the surface of the chassis with the M3 screws and nuts , please note that battery is not include,
battery height should ≤ 67 mm.
4 OSOYOO Model-X Motor Driver Module
Accessories:
M3*6 Plastic Screw x 4
M3 Plastic Nut x 4
M3*5+6 Plastic Pillar x 4
Fixed the OSOYOO Model-X motor driver module on the surface of the chassis with the M3 screws and nuts
5 OSOYOO UNO
Accessories:
M3*6 Plastic Screw x 3
M3 Plastic Nut x 4
M3*5+6 Plastic Pillar x 4
Fixed the OSOYOO UNO board on the surface of the chassis with the M3 screws and nuts
6 Sensor Shield V5.0 for Arduino UNO
Plug the Sensor Shield V5.0 for Arduino UNO into OSOYOO UNO R3
7 Wire Connection
1）Connect the UNO board, battery box and OSOYOO Model-X according to the following connection diagram:
The wire should in the up side of the DC power connector as picture show：
More detail about OSOYOO Model-X please refer to this link:
Download lesson-1.zip , unzip it, you will see a folder called lesson-1
Step 3:
Connect UNO R3 board to PC with USB cable, open Arduino IDE, choose corresponding board/port for your project
Step 4:
Click file -> click Open -> choose code “lesson-1.ino”, load the code into Arduino, and then upload the sketch to the board.
Code Explanation
Below is the interface definition between OSOYOO Model-X and arduino
Notice: ENA and ENB should connect to PWM port, D3, D5, D6, D9, D10, D11 of Arduino have the PWM output function.
#define IN1 7 //K1、K2 motor direction
#define IN2 8 //K1、K2 motor direction
#define IN3 9 //K3、K4 motor direction
#define IN4 10 //K3、K4 motor direction
#define ENA 5 // Needs to be a PWM pin to be able to control motor speed ENA
#define ENB 6 // Needs to be a PWM pin to be able to control motor speed ENA
The below functions can control the car forward, backward, stop, turn right and turn left:
void go_ahead() //motor rotate clockwise -->robot go ahead
{
digitalWrite(IN1, LOW);
digitalWrite(IN2, HIGH);
digitalWrite(IN3, LOW);
digitalWrite(IN4,HIGH);
}
void go_back() //motor rotate counterclockwise -->robot go back
{
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
digitalWrite(IN3, HIGH);
digitalWrite(IN4,LOW);
}
void go_stop() //motor brake -->robot stop
{
digitalWrite(IN1, LOW);
digitalWrite(IN2, LOW);
digitalWrite(IN3, LOW);
digitalWrite(IN4,LOW);
}
void turn_right(int t) //left motor rotate clockwise and right motor rotate counterclockwise -->robot turn right
{
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
digitalWrite(IN3, LOW);
digitalWrite(IN4, HIGH);
delay(t);
}
void turn_left(int t) //left motor rotate counterclockwise and right motor rotate clockwise -->robot turn left
{
digitalWrite(IN1, LOW);
digitalWrite(IN2, HIGH);
digitalWrite(IN3, HIGH);
digitalWrite(IN4, LOW);
delay(t);
}
The below functions can change motor speed, viriable lspeed can change the left motor speed, variable rspeed can control the right motor speed.
The valid range for this function parameter is 0-255
Disconnect Arduino from PC, put 2 fully-charged 18650 battery into battery pox(check the box instruction and make sure polar direction is correct, otherwise it can destroy your device and cause fire hazard). Please install your battery as per following instruction:
Put the car on the ground, open the power switch in the battery box, the car should go forward 2 seconds, then go backward 2 seconds, then left turn for 2 seconds, then right turn for 2 seconds, then stop.
If the car does not move as per above mentioned result, you should check your wire connection, battery voltage(must over 7.2v).
