POWER SUPPLY CIRCUIT
PRECAUTION!
MAKE SURE THE RIGHT POLARITY (POSITIVE AND
NEGATIVE) FOR THE POWER SUPPLY AND THE COMPONENTS.
OTHERWISE, RISK BURNING THE COMPONENTS AND VOID THE
WARRANTY.
Steps:
1. Connect the battery (12V) to the breadboard.
2. Put a switch at the +12V of the battery. Turn the switch off.
3. Connect the +12V from the switch to the Arduino Microcontroller pin Vin. The Arduino
has its own voltage regulator to accommodate 12V supply.
4. Connect the 12V supply to the DC/DC Step Down (be aware of the IN+ and IN-).
5. **IMPORTANT** Adjust the voltage out of the DC/DC step down voltage by varying
its potentiometer (using screw driver). Check the voltage by using the Digital Multi Meter
(DMM). Set it to be around 8V.
6. Connect the OUT+ (8V) to the motor driver (pin 8) and OUT- to the GND to supply power
to the motors.
7. Connect the 5V and GND from the arduino to the breadboard and supply 5V to the motor
driver chip.
1
2
3 4
5
6
DC/DC Voltage
Step Down
Motor Driver
Switch
Battery
(Power Supply)
Arduino
Microcontroller
MODULE 1: MOTOR & L293D
HOW DIFFERENTIAL WHEELED ROBOT MOVE?
DIFFERENTIAL WHEELED ROBOT TURNS
MOTOR DRIVER
a) L293D
b) L298N
SOURCE CODE (MOVING THE ROBOT):
MODULE 2: AUTO-CALIBRATING LINE SENSOR
AUTO-CALIBRATING LINE SENSOR
SOURCE CODE (DATA READING):
MODULE 3: LCD
LCD I2C
SOURCE CODE:
MODULE 4: SERVO
MICRO SERVO
SOURCE CODE:
MODULE 5: BLUETOOTH MODULE (HC-06)
BLUETOOTH MODULE HC-06
a) SOURCE CODE (AT Command HC-06)
b) SOURCE CODE (Bluetooth controlled LED by Android or PC)
MODULE 6: ULTRASONIC
HC-SR04 with LED and RESISTOR (470)
SOURCE CODE (READING):
SOURCE CODE (HC-SR04 WITH LED):