An Arduino and Ultrasonic PCB Device for Visually Impaired People

Arshmah Shahkar

Do you know how many difficulties blind people have to face while doing their tasks? They always need someone who can help them in walking, eating, bathing, and performing their daily routine actions. Especially when they go out, while crossing the roads and hurdles they need some support or anything which can identify any obstacle in their way.

They usually use some walking sticks or any pet mostly dogs for walking but they are not very useful in identifying any hurdle or uneven surfaces and their chances of falling down, getting injured can be increased.

Obstacle Detection with Ultrasonic Sensor:

I have designed an obstacle or uneven surfaces detection PCB device that is wearable and can identify any hurdle in the way before time. I have used an Ultrasonic sensor which is really efficient in sensing any obstacle. It can measure up to 2cm to 400cm or 1” to 13 feet easily. That’s means now blind people can walk easily they do not need to worry about any accident to has happened with them.


It can be attached to a headband, wristband, or knee band as it is compact and wearable. The circuitry consists of:

Wearing this band a blind person can be secured from different directions and angles because the ultrasonic sensor can sense from different angles. When there will be a hurdle, a sensor with the help of Arduino will detect it, the buzzer will sound alarm, a small DC motor attached to it will start vibrating, and an LED will start blinking to alert the blind person to be careful. A band can be turned off when it is not in use using the switch button.

Design Implementation:

I have designed this compact PCB on Altium Designer. After designing my schematic and PCB, I have uploaded my design online on Inventhub so that I can have the backup of my design and more people will be able to see and implement my design.

For the fabrication, I do not need to visit my manufacturer to fabricate my board I can only send him this file and he can view or download my file to prepare my board.

Release file:

Once I have completed my design, I have uploaded all design files on Inventhub. Users and manufacturers can view or download those files to implement and design my board. While fabrication, It is important to keep in mind that the symbols, footprints, and connections are not missing. So it is a good practice to use the ZIP format files for design in order to avoid errors.

List of Components:

The BOM file on Inventhub consists of each and every detail of my components like library reference, manufacturer, dimensions, and quantity. My component provider can download the file in CSV format and can deliver my components.

For detailed information on design implementation visit the link below:

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