Smart walking stick for the blind using Ultrasonic sensor:
Smart walking stick for the blind is the device used to help the blind people to walk. This done by using an Ultrasonic sensor, RF remote and LDR. The data about the surroundings indicated through the buzzer. Even, an advanced level implemented in this project, like using a vibration motor in place of a buzzer, etc.
Smart blind stick requires two circuits. One is the main circuit to check the surroundings and the other is an RF Transmitter circuit used to locate the main circuit. Arduino used for controlling all the sensors. Arduino has given with a power of 5 V so, we require a 7805 voltage regulator. The Ultrasonic sensor works with 5 V. All other sensors also works with 5 V. Ultrasonic sensor has Trig and Echo pin. These connected to a digital pin of Arduino whereas LDR along with resistor output connected with an analog pin of Arduino.RF receiver pin linked with an analog pin.
The buzzer is the output device which connected to a digital pin. Usually, RF Transmitter requires Encoder and Decoder circuit, but in this project, receiver circuit used to detect whether the transmitter is sending the signal. Receiver data passed through an RC filter and given to Arduino. Whenever the button has pressed, some voltage sent repeatedly. This helps the blind person to track his stick.
In this project, sensor data read by the Arduino. If the LDR reads value less than the normal light value, an alert given through a buzzer. Similarly, if the value greater than the normal light value, an alert with different sound generated. The distance measured by the Ultrasonic sensor. If any obstacle found, an alarm given to the blind person.
We also Make your home, SMART Home. For More details, click the below link.