This is revision A of the DualMotor2Amp module. The status of this project is work in progress.

DualMotor2Amp Module (Revision A)

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

1. Introduction

The DualMotor2Amp module allows for control of up to two small DC motors via pulse width modulation and up to 2 amps per motor. Power is provided via an external terminal block.

2. Programming

{To be written}.

The DualMotor2Amp commands are summarized in the table below:

Command Send/
Receive Byte Value Discussion
7 6 5 4 3 2 1 0
More commands here.
Shared Commands Send 1 1 1 1 1 c c c Execute shared command ccc.

Command	Send/ Receive	Byte Value	Discussion
7	6	5	4	3	2	1	0
More commands here.
Shared Commands	Send	1	1	1	1	1	c	c	c	Execute shared command ccc.

On power up, the DualMotor2amp module sets all variables to zero. The motor modes default to pulsed forward.

3. Hardware

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

3.1 Circuit Schematic

The schematic for the DualMotor2amp module is shown below:

The parts list kept in a separate file -- dualmotor2amp.ptl.

3.2 Printed Circuit Board

The printed circuit files are listed below:

dualmotor2amp_back.png: The solder side layer.
dualmotor2amp_front.png: The component side layer.
dualmotor2amp_artwork.png: The artwork layer.
dualmotor2amp.gbl: The RS-274X "Gerber" back (solder side) layer.
dualmotor2amp.gtl: The RS-274X "Gerber" top (component side) layer.
dualmotor2amp.gal: The RS-274X "Gerber" artwork layer.
dualmotor2amp.drl: The "Excellon" NC drill file.
dualmotor2amp.tol: The "Excellon" NC drill rack file.

4. Software

The DualMotor2amp software is available as one of:

dualmotor2amp.ucl: The µCL source file.
dualmotor2amp.asm: The resulting human readable PIC assembly file.
dualmotor2amp.lst: The resulting human readable PIC listing file.
dualmotor2amp.hex: The resulting Intel^® Hex file that can be fed into a PIC12C5xx programmer.

The DualMotor2amp test suite is available as one of:

dualmotor2amp_test.ucl: The µCL source file.
dualmotor2amp_test.asm: The resulting human readable PIC assembly file.
dualmotor2amp_test.lst: The resulting human readable PIC listing file.
dualmotor2amp_test.hex: The resulting Intel^® Hex file that can be fed into a PIC16F84 programmer.

5. Issues

The following issues need to be considered:

Consider using the TI 754410 instead of the LM293.