Circuit Cellar Ink 56
March 1995

Table of Contents

2 Ken Davidson	Editor's INK Warm Fuzzies?
6 Harv Weiner	New Product News
14 Bud Moss	Fuzzy Logic: The Next Generation of Control As Bud points out, fuzzy logic balances many factors in measurable and mathematically precise ways. A myriad of graphs help visualize the fuzzy-logic decision-making process. Download: FUZZY.EXE
30 Jim Sibigtroth	Fuzzy Logic for Embedded Microcontrollers Fuzzy logic doesn't necessarily need lots of horsepower. Many embedded applications that use more traditional control schemes can benefit from the use of fuzzy logic. Jim looks at how to keep things simple and speedy. Download: EMBEDFUZ.ZIP
38 Robert Schreiber	Levitating a Beach Ball Using Fuzzy Logic Wanting a hot trade show demo, Microchip takes up Tom Cantrell's PID-pong challenge. Not only do they get a beach ball hovering near the top of a large plastic tube, they do it all with fuzzy logic.
42 David Rees-Thomas	FuzzPong Download: FUZZPONG.ZIP
50 Michael R. Smith Kathy Kim	Being ASSERTive with Your Processor The Advantage of Software Interrupts To interrupt or not to interrupt, that continues to be the question. Past articles have explored the advantages of polling and straight-line code. Now Mike takes a look at the benefits of using software interrupts.
58 Ed Nisley	Firmware Furnace Journey to the Protected Land: Smashed Gates & Conforming Code Enforcing strict levels of access is good for preventing an errant task from trashing sensitive core code, but there are times when such access is necessary. Ed looks at what's involved in granting just that. Download: FF56.ZIP
68 Jeff Bachiochi	From the Bench RF Panic Button Commands Multiple Automotive Functions Concerned about being stalked in dimly lit parking lots? Try Jeff's key-ring transmitter. You'll be able to lock or unlock your vehicle's doors, unlock your trunk, or in case of emergency, sound the horn.
72 Tom Cantrell	Silicon Update Plan '251 from Outer Space: Intel's 8xC251SB Here's a stamp of approval for Intel's 8xC251SB, a new star upstaging its predecessor, the 8051. After checking out its similarities to the 8051, Tom cuts straight to its differences -- alien opcodes, shorter instruction cycles, and register architecture.
78 John Dybowski	Embedded Techniques Embedded Development Program development for small embedded processors can be problematic without the proper tools. John's answer -- he emulates the AT89C2051 with the 8051-compatible AT89C51, saving lots of time and money.
81	Advertiser's Index
85 Ken Davidson	ConnecTime -- Excerpts from the Circuit Cellar BBS
96 Steve Ciarcia	Steve's Own INK Necessity: the Mother of Invention

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