ARTICLES
FET PRINCIPLES AND CIRCUITS — (Part 3) - Ray Marston
Take a look at practical MOSFET and CMOS circuits.
HAM OPERATORS ENJOYING THE NEW LICENSE STRUCTURE - Gordon West
Even though the new rules may have caught old-time hams off-guard, the 5 wpm code is inspiring many would-be amateur radio operators to “go for it.” And, as the hobby continues to grow, “ham ambassadors” can help bridge the gap between old and new.
A SIMPLE TUNABLE LOW PASS ACTIVE FILTER - James Lyman
A fifth order Butterworth filter in an eight-pin chip is just what the doctor ordered when it comes to experimenting with electronic systems.
CNC RETROFIT: AFFORDABLE SERVO CONTROL FOR YOUR DESKTOP MILLING MACHINE - Jeffrey Kerr
Put together a high-performance, servo motor based CNC controller using low-cost servo motor controllers and Windows-based freeware.
BUILD THE INCREDIBLE ELECTRONIC MAILBOX! - Russ Shumaker
Noooo, not E-Mail! This device transmits a wireless signal from your mailbox which sounds a chime in your house to announce when the mail has arrived. And, unlike most previously published mailbox projects, this one is simple, cheap, and foolproof.
TROUBLESHOOTING AN RF SIGNAL GENERATOR - Fred Blechman
Troubleshooting old equipment is often easier than dealing with PCS, integrated circuit chips, and tiny SMT components used in modern equipment. Follow the adventures of Steve and Bob to learn how signal generators work and how to repair them.
MORE PIC MACROS - Tom Lyons Fisher and Mayeul Marie Rigo
PIC Programmers: Check out some additional utilities inspired by Karl Lunt’s July 2000 article “A High-Power PIC Macro Library.”
BUILD THIS LOW-COST FUNCTION GENERATOR - Anthony Caristi
Anyone who likes to tinker with electronic circuits needs, from time to time, a generator that will provide a signal — of some desired frequency — that can be used to drive a circuit or component such as an amplifier or speaker. However, most people don’t want to invest a large sum of money for a signal generator. The answer to this is to build the simple, yet versatile, quality function generator presented here.
COLUMNS
AMATEUR ROBOTICS NOTEBOOK - Robert Nansel
Meet “Jiffy” ... not just your standard brand of peanut butter any more ...
ELECTRONICS Q & A - TJ Byers
The definitive answer on converting multi-line telephones. AC and DC lamp dimmers, alarm clock relay, and an RV water tank gauge. Solutions to some perplexing component replacement part problems, and cool web sites for on and out of this world.
OPEN CHANNEL - Joe Carr
Telephones and EMI.
Electromagnetic interference to telephone receivers is often difficult to nail down. Nevertheless, the EMI problem can be dealt with using the methods discussed in this month’s column.
STAMP APPLICATIONS - Jon Williams
Stamps in the Lab.
The BS2 is a great lab interface. It’s got 16 I/O lines, all kinds of neat functions, and a serial interface to the PC that doesn’t take away any of the I/O structure. This month, find out about a neat little program the guys at SelmaWare Solutions came up with. It’s called Stamp Plot Lite and it is a fully configurable, general-purpose graphing and data logging utility.
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