This is the revision A version of the IRProximity1 board.

IRProximity1 Board (Revision A)

Table of Contents

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

1. Introduction

The IRProximity1 board input/output pins. The pins can be digital input, digial output, or analog input. The analog input pins can measure up to 10 bits resolution between 0 and 5 volts. This board is based on the Sharp IS471F (.pdf) infrared sensor.

2. Hardware

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

The parts list kept in a separate file -- irproximity1.ptl.

2.1 Circuit Schematic

The schematic for the IRProximity1 board is shown below:

2.2 Printed Circuit Board

The printed circuit board files are listed below:

irproximity1_back.png

The solder side layer.

irproximity1_front.png

The component side layer.

irproximity1_artwork.png

The artwork layer.

irproximity1.gbl

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

irproximity1.gtl

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

irproximity1.gal

The RS-274X "Gerber" artwork layer.

irproximity1.gml

The RS-274X "Gerber" mask layer.

irproximity1.drl

The "Excellon" NC drill file.

irproximity1.tol

The "Excellon" tool rack file.

3. Issues

The following issues have come up:

• The pin-outs on this chip are not obvious. Use the bottom view of the chip to figure everything out.
• I think the large flat area is the sensor area.
• I need to prototype this sensor onto a protoboard before trying again.
• Design the board so that the sensor and IR LED go on the bottom.
• The negative side of D1 should be attached to pin-4. The possitive side should be attached to Vcc. A current limiting resistor may be needed.