Arduino enthusiast Alberto Bietti has created a simple and noisy project based on an Arduino board - his ultrasonic theremin. This is a type of musical instrument that can be played without any physical contact, thus the ultrasonic sensor which measures the distance between itself and an object.
By using an Arduino and an ultrasonic-distance sensor, an organ has been created that detects how far an object is from the sensor and plays a tone relative to the distance.
Many vehicles are fitted with ultrasonic sensors that let you know if you're getting too close to a wall or pedestrian, however the actual distance is not given.
As the train approaches the end of the line, the ultrasonic sensor reports back to the Arduino how far the train has to go before causing an accident. Then the sketch can slow down or stop the train (either via a motor controller for 9V trains or infra-red for PF-series LEGO).
Created by Jin Choi the hardware is very simple - consisiting of an Arduino-compatible circuit, an inexpensive ultrasonic distance sensor and some bright LEDs. The sensor is directed towards the vehicle's approach direction and flashes the LEDs in various ways to indicate how far the bumper is from the wall or other object.
Therefore we can turn to the Arduino world and inexpensive ultrasonic distance sensors to determine the volume of water left in a tank with the help of a project by Instructables member vonPongrac.
The device is quite simple, which consists of an Arduino board, an ultrasonic distance sensor and a small vibration motor. Once all this is fitted in a small enclosure, the device can be used to determine how far an object is located from the user - and could be considered an additional tool along with the white cane to use when on the move.
Motion detection is handled by two ultrasonic distance sensors, and its' head moves via a servo. Here it/he/she is in action: With some imagination and the right sensors all sorts of things could be possible. Put it on wheels and it could possibly follow you around! Either way, to get started click here.
The sculpture detects the presence of people around it using an ultrasonic sensor, and once detected music is played and various effects generated with LED strip lighting.
They created a device based around an Arduino circuit and an ultrasonic distance sensor, which measures the distance between the vehicle and the wall, and sends the data back to a receiver unit via a 433 MHz wireless data link.
