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How to use multiple hc-sr04 with Arduino?
A much cheaper way is by using multiple ultrasonic sensors like the HC-SR04. This tutorial explains how you can use multiple HC-SR04, reading and sending data all at once with an Arduino microcontroller. A tutorial about the HC-SR04, and how it can be used in an Arduino, can be found in a previous article here.
What can you do with three hc-sr04 modules?
In this note we are going to illustrate how three (or more) HC-SR04 modules can be used to add further “intelligent” vision to your bots. Basic usage of HC-SR04 and the principles on which it is based have already be given in this note. The idea is to position the three sensors at fixed angles one another. Each module will give its own measure.
What can a hc-sr04 distance sensor be used for?
The HC-SR04 is an inexpensive, easy to use distance sensor, with a range of 2 to 400cm. It is commonly used in obstacle avoiding robots and automation projects.
How to dispose of ultrasonic modules in hc-sr04?
Figure 1. The general situation. It is important to dispose the two additional ultrasonic modules (HC-SR04 #1 and #3 in Figure 1) at fixed angles on an ideal circle of radius R centered in the origin. To be able to do that in practice, just place your sensor #2 and decide how much R should be.
Which is the best angle for hc-sr04?
Concerning θ, recall that in our previous post (see it here) we said that HC-SR04 starts giving erratic results when the obstacle is at angles greater than 30°. Therefore, a good choice could be 30°. Indeed, it is a good choice also because sin and cos functions take well known values at this angle and this will ease and speed up our calculations.
How big is the path of the hc-sr04?
The HC-SR04 barely works to 10 feet giving a total path length of 20 feet and a path time of about 20ms so set the timeout to something above that, say 25 or 30ms. If you put a resistor, say 2k2 between E and T then only connect to T you can use the HC-SR04 from just one Arduino pin.
What can you do with hc-sr04 ultrasonic sensor?
Written by Benne de Bakker 23 Comments. The HC-SR04 is an inexpensive, easy to use ultrasonic distance sensor, with a range of 2 to 400 cm. It is commonly used in obstacle avoiding robots and automation projects. In this tutorial, you will learn how the sensor works and how to use it with Arduino.