Please click here if you are not redirected within a few seconds. Rickey's World Toggle sidebar Login Toggle sidebar. Login Please Enter Your Information. Remember Me Login. I forgot my password. I want to register. Back to login. Tue Aug 14PM. I see a nice and useful idea well done TPS! So this is something to think on. Wed Aug 15AM. So that they reach the right place in right time. Wed Aug 15PM. No one know when you see a small side road in the main road. Sun Dec 06AM. Following links help you www.
Thu Sep 16PM. Sat Sep 18AM. I think its better to implement basic idea first then go for enhancements. Sat Sep 18PM. Get Social. Powered by e Forum System. Wed Mar 25AM. Fri Mar 13PM. Fri Mar 13AM. Sat Mar 07PM. Wed Feb 26AM. Sat Feb 01AM.This project is designed to guide a visually impaired person to walk and avoid bumping into obstacles. Low cost ultrasonic rangefinders along with a microcontroller is used to measure the distance to obstacles and if they are close enough provide a feedback to the user in form of beeps or vibrations.
The project is made on a small single layer PCB. The sensors are not mounted on the PCB but they are mounted on front of the stick and connected to the main board using wires.
All the parts of project PCB is shown in the image below. Read more …. Facing problem with your embedded, electronics or robotics project?
We are here to help! Post a help request. Avinash Gupta is solely focused on free and high quality tutorial to make learning embedded system fun! More Posts - Website. Follow Me:. Thank you again.
Sir we are doing your project as our science exhibition project so I need your help in making the prototype. My cousins urgently need two sensing walking sticks as they are visually impaired. Can you please inform me where these sticks are available for purchase and what is the cost of each stick. G N Rao. Sorry, but I have NOT manufactured these sticks on commercial scale. I just made prototype circuit and programming. Please help me with this.
I am working on obstacle masurement and i have to connect 4 hc sr04 ultrasonic range finder with Microcontroller At89S Please provide as soon as possible. Please provide a reply as soon as possible.
Ph Dhanlakshmi agencies Bangalore. Please reply on dhanlakshmig9 gmail.
Notify me of followup comments via e-mail. Home Store Links. Delivered by FeedBurner. Avinash Avinash Gupta is solely focused on free and high quality tutorial to make learning embedded system fun!Published by Avinash Gupta on 1 Apr This project is designed to guide a visually impaired person to walk and avoid bumping into obstacles.
Low cost ultrasonic rangefinders along with a microcontroller is used to measure the distance to obstacles and if they are close enough provide a feedback to the user in form of beeps or vibrations. The project is made on a small single layer PCB. The sensors are not mounted on the PCB but they are mounted on front of the stick and connected to the main board using wires.
All the parts of project PCB is shown in the image below. The power indicator LED should glow. The system is now ready. For testing purpose keep all the three sensors on flat surface such as ultrasonic beam emitted by them is horizontal. Make sure their are no obstacles in front of any sensor up-to a distance of 1 meter. Slowly come close to the center sensor until the buzzer starts beeping.
For obstacles found by the center sensor their are two quick beeps. Try to remember this beep patten. Now move slowly towards the right sensor also make sure their is no obstacle in front of the front sensor.
For obstacles sensed by right sensor it will give three quick beeps. Similarly for left sensor it will give single beep. While testing left or right sensor make sure the front sensor is free of obstacle, because front center sensor has highest priority, if it has obstacles in front of it, buzzer will give two quick beeps indicating obstacle in center.
We cordially thanks the following peoples who shared this page on various social networks and insprided us to develop more quality contents! Traditionally visually impaired people used a stick to find out if any obstacles are present in front of them and also their approximate distance and position left, right or in front. But in present time we can help them by developing a better system using a PIC microcontroller.
A PIC microcontroller is small and low cost single chip computer that can do calculations automatically at high speed with great accuracy. When we combine this power with a pair of ultrasonic wave transmitter and receiver, we can use PIC's accurate time measurement features to measure the time it takes for the sound waves to reach an obstacle and bounce back to the receiver.
By quick and fast calculations we can immediately find out the distance in cm. And if the obstacle is too close we can in alert the user with a beep of buzzer and a small vibration of the stick. Remember me Forgot Password?
Please share.Hello everyone, I hope you all are doing great. I have designed its complete Simulation which I am gonna share today. We have placed a small amount on it and you can buy it from our shop via PayPal. If you have any problem in understanding this project, then you can ask in comments and I will try my best to resolve your issues.
Smart Blind Stick project is designed quite a lot in engineering universities. Although its a Proteus Simulation but if you wanna design it on hardware then this code will work perfectly fine as I have tested it on hardware.
If you got into any trouble in running this simulation then you can also send me message via Contact Form and I will surely help you out. If you want to buy this project then, you must first watch this video, so that you got the idea of what you are buying.
I hope you have enjoyed this Smart Blind Stick. Till next tutorial, take care and have fun!!! I am a programmer since before that I just search things, make small projects and now I am sharing my knowledge through this platform.Ultrasonic Sensor Based Range Finder using 8051
I also work as a freelancer and did many projects related to programming and electrical circuitry. Project idea is good.Ever heard of Hugh Herr? He is a famous American rock climber who has shattered the limitations of his disabilities; he is a strong believer that technology could help disabled persons to live a normal life. A person can never be broken. Our built environment, our technologies, is broken and disabled.
These were not just words but he lived his life to them, today he uses Prosthetic legs and claims to live to normal life. This Smart stick will have an Ultrasonic sensor to sense distance from any obstacle, LDR to sense lighting conditions and a RF remote using which the blind man could remotely locate his stick.
All the feedbacks will be given to the blind man through a Buzzer.
8051 Microcontroller Mini Projects
Of course you can use a vibrator motor in place of Buzzer and advance a lot more using your creativity. The other is a small remote RF transmitter circuit which will be used to locate the main circuit. As we can see an Arduino Nano is used to control all the sensors. The Ultrasonic sensor is powered by 5V and the trigger and Echo pin is connected to Arduino nano pin 3 and 2 as shown above. The output of the board is given by the Buzzer which is connected to pin The RF remote circuit is shown below.
Its working is also further explained. I have used a small hack to make this RF remote control circuit to work. But, in our application we just need the receiver to detect if the transmitter is sending some signals.
smart stick for blind persons
So the Data pin of the transmitter is connected to Ground or Vcc of the supply. The data pin of the receiver is passed through an RC filter and then given to the Arduino as shown below. Now, whenever the button is pressed the Receiver output some constant ADC value repeatedly. This repetition cannot be observed when the button is not pressed.
So we write the Arduino program to check for repeated values to detect if the button is pressed. So that is how a Blind person can track his stick. You can check here: how RF transmitter and receiver work.
I have used a perf board to solder all the connections so that it gets intact with the stick. But, you can also make them on a breadboard. The boards that I made are below. Once we are ready with our hardware, we can connect the Arduino to our Computer and start programming. The complete code used for this page can be found at the bottom of this page, you can upload it directly to your Arduino board.
However, if you are curious to know how the code works read further. Like all programs we start with void setup to initialise Input Output pins. We also initialise the serial monitor for debugging. Inside the main loop we are reading all the sensors data.
smart stick for blind persons
We begin with reading the sensor data of Ultrasonic sensor for distance, LDR for light intensity and RF signal to check if the button is pressed. All these data is saved in a variable as shown below for future use. We start with checking for the Remote signal. This repetition will occur only when the button is pressed. So we trigger the Remote pressed alarm if the count exceeds a value of Next we check for the intensity of light around the blind man. If the LDR gives a value of less than it is assumed to be very dark and we give him the warning through buzzer with a specific tone of delay with ms.Blindness is a state of lacking the visual perception due to physiological or neurological factors.
The partial blindness represents the lack of integration in the growth of the optic nerve or visual centre of the eye, and total blindness is the full absence of the visual light perception. In this work, a simple, cheap, friendly user, smart blind guidance system is designed and implemented to improve the mobility of both blind and visually impaired people in a specific area.
The proposed work includes a wearable equipment consists of head hat and mini hand stick to help the blind person to navigate alone safely and to avoid any obstacles that may be encountered, whether fixed or mobile, to prevent any possible accident. The main component of this system is the infrared sensor which is used to scan a predetermined area around blind by emitting-reflecting waves.
The reflected signals received from the barrier objects are used as inputs to PIC microcontroller. The microcontroller is then used to determine the direction and distance of the objects around the blind.
It also controls the peripheral components that alert the user about obstacle's shape, material, and direction. The implemented system is cheap, fast, and easy to use and an innovative affordable solution to blind and visually impaired people in third world countries. Many people suffer from serious visual impairments preventing them from travelling independently.
Accordingly, they need to use a wide range of tools and techniques to help them in their mobility. One of these techniques is orientation and mobility specialist who helps the visually impaired and blind people and trains them to move on their own independently and safely depending on their other remaining senses.
However, this method has some limitations such as difficulty to understand the complex direction by these dogs, and they are only suitable for about five years. The cost of these trained dogs is very expensive, also it is difficult for many of blind and visually impaired persons to provide the necessary care for another living being. There is an international symbol tool of blind and visually impaired people just like the white cane with a red tip which is used to enhance the blind movement.
Nowadays, different types of these canes have been used such as the white cane [ 1 ], the smart cane [ 2 ], and the laser cane [ 3 ]. However, this tool has several constraints: long length of the cane, limitations in recognizing obstacles, and also difficulty to keep it in public places.
Recently, many techniques have been developed to enhance the mobility of blind people that rely on signal processing and sensor technology. These called electronic travel aid ETA devices help the blind to move freely in an environment regardless of its dynamic changes. According to the literature, ETAs are mainly classified into two major aspects: sonar input laser signal, infrared signals, or ultrasonic signals [ 4 — 8 ] and camera input systems consists mainly of a mini CCD camera [ 9 — 13 ].
Their details are shown in Table 1. The way these devices operate just like the radar system that uses ultrasonic fascicle or laser to identify height, the direction, and speed of fixed and moving objects.
The distance between the person and the obstacles is measured by the time of the wave travel. However, all existing systems inform the blind of the presence of an object at a specific distance in front of or near to him. These details permit the user to change his or her way. Information about the object characteristics can create additional knowledge to enhance space manifestation and memory of the blind.
To overcome the above-mentioned limitations, this work offers a simple, efficient, configurable electronic guidance system for the blind and visually impaired persons to help them in their mobility regardless of where they are, outdoor or indoor. The originality of the proposed system is that it utilizes an embedded vision system of three simple IR sensors and brings together all reflective signals in order to codify an obstacle through PIC microcontroller.
Hence, in addition to distance the proposed guidance system enables the determination of two main characteristics of the obstacle which are material and shape. Furthermore, the user of the system does not need to carry a cane or other marked tool. It has high immunity to ambient light and colour of object. Proteus is software for microprocessor simulation, schematic capture, and printed circuit board PCB design.
Proteus-VSM Virtual System Modelling permits the cosimulation of the embedded software for popular microcontrollers alongside with the hardware design [ 14 ]. The software Proteus was used to design and analyze both preliminary and final results for each part of the system [ 14 ].
Proteus enabled the system to be tested and modified until accurate and expected results were obtained prior to the circuit installation in practice.Mini projects play significant role in developing skills of Engineering students from third year of their academic course.
The basics of microcontroller are cover in the syllabus, so the students are equip with the idea of embedded systems. Even the students can build project by learning which has a wide resource over internet.
This is being use on many real world applications like automobiles, consumer electronics and more. Microcontroller uses CMOS technology and hence it is efficient in operating at lesser amount of power.
It is enable to program using either low—level or high—level languages. The major advantage of using microcontroller is that, it extremely reduces cost since all the smaller elements are integrate over a chip. This merit reflects on projects by reduce the complexity in system design and minimizes wiring burden.
Therefore using a microcontroller produces multiple advantages that are list in the following. Students pursuing their Engineering degree in different branches are suppose to learn specific subjects in detail from the beginning of basics.
Both the experts are available here on Mini-Projects to serve students with unique projects. Microcontroller is also a wide field which is capable to bring new inventions that can be used in real applications.
Having Your Own Idea in Microcontroller? However to learn the recent developments in your interest area, you need experts advice and implementing an emerging concept requires experts guidance.