This is the Revision B verion of the Laser_Sense1 Module.

Laser_Sense1 Module (Revision A)

Table of Contents

• 1. Introduction
• 2. Hardware
  • 2.1 Circuit Schematic
  • 2.2 Printed Circuit Board
• 3. Issues

1. Introduction

The Laser_Sense11 module provides a sensor for detecting a reflected laser beam. This module is meant to be interfaced to the Laser2 Module.

2. Hardware

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

2.1 Circuit Schematic

The schematic for the Laser_Sense1 Module is shown below:

The parts list kept in a separate file -- laser_sense1.ptl.

2.2 Printed Circuit Board

The printed circuit board files are listed below:

laser_sense1_back.png

The solder side layer.

laser_sense1_front.png

The component side layer.

laser_sense1_artwork.png

The artwork layer.

laser_sense1.gbl

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

laser_sense1.gtl

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

laser_sense1.gal

The RS-274X "Gerber" artwork layer.

laser_sense1.drl

The "Excellon" NC drill file.

laser_sense1.tol

The "Excellon" tool rack file.

3 Issues

The following issues came up:

• The artwork lists 2 R1's.
• The + side of the LED is not marked.
• The artwork does not really indicate which orientation to use for the phototransistors.
• The photo transistor next to the connector is too tight.