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Arduino ultrasonic radar

Posted on September 27, 2016 by R-B Leave a comment

Dejan Nedelkovski from How To Mechatronics has a very nice tutorial about making an ultrasonic radar using Arduino and Processing platforms. The project requires an HC-SR04 ranging sensor module mounted on a servo motor to scan the surrounding. The Arduino board control the scan position, as well as receives the ranging sensor output. The received echo data is post-processed on a computer using a Processing-based application and the radar signature is displayed on the computer screen.

Arduino ultrasonic radar

See this radar in action in the following video.

Displaying temperature and humidity on servo-driven analog panels

Posted on April 1, 2014 by R-B Leave a comment

This thermometer and hygrometer project from Kerry Wong’s website illustrates a technique of constructing analog display panels where the display needles are controlled through servo motors. The project uses the SHT21 digital sensor and the ATMega328p microcontroller.

Thermometer and Hygrometer with analog display panels

Lab 21: Servo motor control

Posted on April 7, 2012 by R-B 18 comments

A servo motor is a special geared DC motor equipped with an electronic circuit for controlling the direction of rotation, as well as the position, of the motor shaft. Because servo motors allows precise angular positioning of their output shaft, they are used extensively in robotics and radio-controlled cars, airplanes, and boats to control the motion of their various parts. In this lab session, we will first explore what a servo motor consists of and how it works and then illustrate how to interface it with a PIC microcontroller.

Servo motor control using PIC microcontroller

Arduino-Python based multiple servo control

Posted on January 12, 2011 by R-B Leave a comment

This tutorial describes how to control multiple servos with an Arduino module interfaced to a PC through serial port. The application program on the PC is written in Python script that gives control commands to the Arduino module. The Arduino module receives the commands through its serial input and then moves each servo to its commanded position.

The hardware part consists of an Arduino module, four JR Sport ST47 standard servos, and a breadboard to prototype the circuit.