Circuit Cellar Ink 59
June 1995

Table of Contents

2 Ken Davidson	Editor's INK Breaking Down the Barriers
6 Harv Weiner	New Product News
12 Seibert L. Murphy Samir I. Sayegh	Artificial Neural Network Recognizes Sounds It's one thing to hear sound. It's quite another to intelligently identify the sound. Here, neural nets do just that -- they recognize a tone whether it's generated by a signal generator or a loudspeaker.
20 Gregg Norris Eric Wilson	The Eye Mouse An Ocular Prosthesis The Eye Mouse offers people with extreme disabilities the opportunity to control a computer. An electrode interface enables a person to manipulate a common mouse pointer using his or her eyes. Download: EYEMOUSE.ZIP
28 Don Lancaster	The Quest for Magic Sine Waves Upping Power Electronics Efficiency A little magic goes a long way in replacing PWM. Don creates his magic through canceling harmonics. As he points out, the tricky part is not coding the binary sequences, but searching for the right 420-bit words. Download: MAGICSIN.ZIP
36 Brad Hunting	The Solution's in the CAN -- Part 2 Putting CAN Online with a Multinode, Multiplatform Implementation Determined to see if CAN really can, Brad puts CAN through all the paces -- a multinode, multiplatform network, a PC, an 8031, and an 80C592. It seems there ain't much this CAN cannot do. Download: CANAPPS.ZIP
46 Ed Nisley	Firmware Furnace How the PC Keyboard Got its Bits Ed takes a brief aside from protected-mode programming to look at the keyboard. After reviewing the history of keyboard development, Ed gets into the nitty-gritty issues of keyboard microprocessors and scan codes. Download: FF59.ZIP
56 Jeff Bachiochi	From the Bench Emulating a Motorola IR Chip Using a PIC When chip s and support products disappear, what do you do? According to Jeff, you engineer your way around the problem. Here, Jeff uses a PIC to emulate the original Motorola infrared transmission codes to get back in business. Download: FTB59.ZIP
64 Tom Cantrell	Silicon Update Chip on Patrol You want an 8-bit controller that's not an 8051, but is still cost-effective and can provide a solid midrange solution? Well, have you tried National's COP family? According to Tom, COP's the way to go.
72 John Dybowski	Embedded Techniques How Small Can a Thermometer Get? John uses an AT89C2051 microcontroller to network a DS1620 digital thermometer. A small LCD displays the temperature while RS-485 provides a network interface. Download: ET59.ZIP
81	Advertiser's Index
82 Ken Davidson	ConnecTime -- Excerpts from the Circuit Cellar BBS
96 Steve Ciarcia	Steve's Own INK Pyramid Schemes

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