This is the Revision A version of the SonarSR module.

SonarSR Module (Revision A)

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1. Introduction
2. Hardware
- 2.1 Circuit Schematic
- 2.2 Printed Circuit Board
5. Issues

1. Introduction

The SonarSR module is the sensor module that is used in conjunction with the Sonar4 driver module. Up to 4 SonarSR modules can be driven by a single Sonar4 module to provide 4 independently triggerable and targeted sonar senors.

The SonarSR is designed to allow the use of relatively inexpensive ultrasound transducers available from places like Electronics Goldmine for $1.50. With the SonarSR moduleit is possible (in theory) to determine distance from 3cm to 1 meter.

There are several similar reference designs that are worth mentioning. The reference designs are listed below:

http://frontrangerobotics.org/UltraSonic/
This is the primary design that specifies the transducer vendor and the trick of using an RS-422/RS-485 chip to drive the ultrasound emitter.
http://www.robot-electronics.co.uk/htm/srf04tech.htm
This is one of Gerald Coe's original sonar designs.
http://www.seattlerobotics.org/encoder/apr97/sonar.html
This is one of the earlier designs that showed up in the Seattle Robotics Society Encoder.