Introduction: Dark Light
Everybody talks about futuristic things is must be. But one you can't for see the future, how would you react. If your eye's, suddenly go blind. What will you do? But blind people never react because they are blind from the beginning. they struggle every day will this problem. The most important problem is migration. but don't worry about that guy's dark light will help you, some object will be in front of you that you will know even through Dark Light
Step 1: Required Materials
# Arduino nano
amazon link: https://amzn.to/2FZMVCN
# SD card module
amazon link: https://amzn.to/2XwQawi
# Ultrasonic sensor
amazon link: https://amzn.to/2JkTW3c
# lithium iron battery
amazon link: https://amzn.to/2FXqgH4
# lithium-ion battery charging module
amazon link: https://amzn.to/2G1dZBt
# headphone holder
amazon link: https://amzn.to/2FYHaFt
amazon link: https://amzn.to/2FZm9dE
Step 2: How to Achieve This
At first, take the Arduino nano and Ultrasonic sensor. then combine these two and check it properly by testing it.it will work properly,
The second step in to attach the Arduino nano with the sd card module and insert the sd card. to check it's working, play some audio files. It will play if your circuit is completely alright.
ok let's combine these two projects in one
Step 3: Preparing the Audio
normal audio file can't play so, we make some configuration move to ONLINE-CONVTER
Change bit resolution: 8bit
Change sampling rate: 16000
Change audio channels: mono
Step 4: Cheak SDcard Module
SD Card is used for transfering data to and from a standard sd card. The pin out is directly compatible with Arduino and also can be used with other microcontrollers
This module uses the standard SPI interface for communication, which involve SPI buses, MISO, MOSI, SCK, and a CS signal pin.
#CS (chip select)
#SCK (serial clock)
#MOSI (master out slave in)
#VCC (3.3V or 5V)
Connect VCC with 5V in the Arduino.
Connect the GND of SD card to the ground of Arduino.
CS to pin 14
SCK to pin 13
MOSI connect to the pin 11
MISO to pin 12
Step 5: Cheak the Ultrasonic Sensor
ultrasonic sensor uses sonar to determine distance to an object like bats do. It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package. It comes complete with ultrasonic transmitter and receiver
#Power Supply :+5V DCQuiescent Current :
#<15°Ranging Distance :
#2cm – 400 cm/1″ – 13ftResolution :
#0.3 cmMeasuring Angle:
#30 degreeTrigger Input Pulse width:
#10uSDimension: 45mm x 20mm x 15mm
How Does it Work?
The ultrasonic sensor uses sonar to determine the distance to an object. Here’s what happens: The transmitter (trig pin) sends a signal: a high-frequency sound.When the signal finds an object, it is reflected and,the transmitter (echo pin) receives it.
Step 6: How It Works
Now ultrasonic sensor can sense up to 105 meters,almost 5 feet distance. measure the length of the blind people's step in centimeter create or set the coding based on the calculation, Now fix the headset and handle it properly.if an object is in front of the people, it will play audio. it says"one foot" or "four feet" etc...if nothing in the way its play "root clear".
Step 7: Support My Work
youtube channel: INFO TABLE
Participated in the