This is revision A of the Encoder1 Module.

Encoder1 Module (Revision A)

Table of Contents

This document is also available in PDF format.

1. Introduction

The Encoder1 module is a low cost quadrature encoder that works with a paper disk of black and white stripes.

2. Hardware

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

2.1 Circuit Schematic

The schematic for the Encoder1 Module is shown below:

Encoder1 Schematic
This schematic shows 5 sensors, but at most 3 should be installed. A pair of sensor should be installed at U1 and U4 or U2 and U3. If you need an index pulse, install a sensor at U5.

The parts list kept in a separate file -- encoder1.ptl.

2.2 Printed Circuit Board

The printed circuit board files are listed below:

encoder1_back.png
The solder side layer.
encoder1_front.png
The component side layer.
encoder1_artwork.png
The artwork layer.
encoder1.gbl
The RS-274X "Gerber" back (solder side) layer.
encoder1.gtl
The RS-274X "Gerber" top (component side) layer.
encoder1.gal
The RS-274X "Gerber" artwork layer.
encoder1.drl
The "Excellon" NC drill file.
encoder1.tol
The tool rack file.

3. Issues

The following fabrication issues came up:


Copyright © 2009 by Wayne C. Gramlich. All rights reserved.