This is the Revision B version of the LED10 RoboBrick. The status of this project is that it has been replaced by the Revision C revision.

Led10 Robobrick (Revision B)

Table of Contents

This document is also available in PDF format.

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

1. Introduction

The LED10 RoboBrick provides the ability to output 10 bits of data to 10 LED's on board.

2. Programming

The Led4 RoboBrick supports the standard shared commands in addition to the following commands:

Command	Send/Receive	Byte Value								Discussion
		7	6	5	4	3	2	1	0
Write Lower	Send	0	0	0	f	g	h	i	j	Write fghij out to the lower 5 LED's.
Write Upper	Send	0	0	1	a	b	c	d	e	Write abcde out to the upper 5 LED's.
Bit Clear	Send	0	1	0	0	b	b	b	b	Turn LED bbbb off. MSB (bbbb=1001) LSB (bbbb=0000)
Bit Set	Send	0	1	0	1	b	b	b	b	Turn LED bbbb on.
Bit Toggle	Send	0	1	1	0	b	b	b	b	Toggle LED bbbb.
Bit Read	Send	0	1	1	1	b	b	b	b	Read status of LED bb.
	Receive	r	r	r	0	0	0	0	b	LED state is b. Blink rate is rrr
Read All	Send	1	0	0	0	0	0	0	0	Read all ten LED's.
	Receive	0	0	0	a	b	c	d	e	Upper five LED state is abcde
	Receive	0	0	0	f	g	h	i	j	Lower five LED state is fghij
Read Lower	Send	1	0	0	0	0	0	0	1	Read lower five LED's.
	Receive	0	0	0	f	g	h	i	j	Lower five LED state is fghij
Read Upper	Send	1	0	0	0	0	0	1	0	Read upper five LED's.
	Receive	0	0	0	a	b	c	d	e	Upper five LED state is abcde
Blink Rate Set	Send	1	0	0	0	0	0	1	1	Set Blink Rate
	Send	r	r	r	0	b	b	b	b	Set LED bbbb blink rate to rrr. On (rrr=000) Slow (rrr=001) Medium(rrr=100) Fast (rrr=111)
Increment LED's	Send	1	0	0	1	b	b	b	b	Increment LED's starting at bit bbbb
Decrement LED's	Send	1	0	1	0	b	b	b	b	Decrement LED's starting at bit bbbb
Power Level Mode	Send	1	0	1	1	l	l	l	l	Set LED's to power level llll; All off (llll=000), All on (llll>=1010)
Shared Commands	Send	1	1	1	1	1	a	b	c	Send shared command abc to RoboBrick.

3. Hardware

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

3.1 Circuit Schematic

The schematic for the Led10 RoboBrick is shown below:

The parts list kept in a separate file -- led10.ptl.

3.2 Printed Circuit Board

The printed circuit board files are listed below:

led10_back.png

The solder side layer.

led10_front.png

The component side layer.

led10_artwork.png

The artwork layer.

led10.gbl

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

led10.gtl

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

led10.gal

The RS-274X "Gerber" artwork layer.

led10.drl

The "Excellon" NC drill file.

led10.tol

The "Excellon" tool rack file.

4. Software

The Led10 software is available as one of:

led10.ucl

The µCL source file.

led10.asm

The resulting human readable PIC assembly file.

led10.lst

The resulting human readable PIC listing file.

led10.hex

The resulting Intel^® Hex file.

5. Issues

The following fabrication issues came up:

• The holes for N1 are too large (size 3) and need to be made smaller (size 2.)
• R1 should be set up so that it can take individual resistors as well.
• The diodes in U2 actually point the other way. Thus, the wires between pin 1 and 20, 2 and 19, ... , 10 and 11 need to be swapped.