This is the Revision D version of the Sonar8 module. The status of this project is work in progress.

Sonar8 Module (Revision D)

Table of Contents

This document is also available as a PDF document.

• 1. Introduction
• 2. Programming
• 3. Hardware
  • 3.1 Circuit Schematic
  • 3.2 Printed Circuit Board
• 4. Software
• 5. Issues

1. Introduction

The Sonar8 module is used to send and receive ultra sonic sonar pulses using the Robot Electronics SRF04 sonar ranging module. Up to 8 SRF04's can be controlled by this module.

2. Programming

There is no programming specification for the Sonar1 RoboBrick yet.

3. Hardware

The hardware consists of a circuit schematic and a printed circuit board.

3.1 Circuit Schematic

The schematic for the Sonar1 RoboBrick is shown below:

The parts list kept in a separate file -- sonar8.ptl.

3.2 Printed Circuit Board

The printed circuit board files are listed below:

sonar8_back.png

The solder side layer.

sonar8_front.png

The component side layer.

sonar8_artwork.png

The artwork layer.

sonar8.gbl

The RS-274X "Gerber" back (solder side) layer.

sonar8.gtl

The RS-274X "Gerber" top (component side) layer.

sonar8.gal

The RS-274X "Gerber" artwork layer.

sonar8.drl

The "Excellon" NC drill file.

sonar8.tol

The "Excellon" tool rack file.

4. Software

The Sonar8 software is available as one of:

sonar8.ucl

The µCL source file.

sonar8.asm

The resulting human readable PIC assembly file.

sonar8.lst

The resulting human readable PIC listing file.

sonar8.hex

The resulting Intel^® Hex file that can be fed into a PIC12C5xx programmer.

5. Issues

The following issues came up during fabrication:

• Connector N11 does not interfere with the Ping sensor plugged into N12. Thus, N11 can be moved to the right edge of the board.
• The capacitor C3 is a problem in its current location. First, it interferes with the PIC16F688 in socket U1. Second, it interferes with the Ping when it is plugged into N12. Third, there is currently only room for an 8mm round capacitor.
• Seriously consider making R3-R10 vertical, to allow U1 to be placed into a veritical mode. This should clear up space for the power supply and allow a larger C3 capacitor.