RANDOM NUMBER DEVICE -PART I
Use this device to generate random numbers by listening to the atmosphere. by Jack Dennon Related Information
BUILD A NEGATIVE ION GENERATOR Ever wonder why the air seems so fresh and clean after a thunderstorm, or how those silent air purifiers work? Build this ion generator and find out the answers for yourself. by Anthony Caristi
LIGHT SENSORS FOR MICROCONTROLLER DIGITAL INPUTS Don't get zapped! Use this simple device to show you if voltage is present at your AC receptacle. by Gary Peek
FEATURES
ADESIGN FOR A POCKET-SIZE CARDIAC EVENT RECORDER/MONITOR The Gadget-O-Rama 2002 3rd place winner. This device will monitor and record ECG signals of the patient wearing it. by Sean K. Barry
UNDERSTANDING AND USING 'OTA' OP-AMP ICs -PART Take a look at operational transconductance amplifier op- amp principles and practical CA3080 OTA circuits.
by Ray Marston
MEASURE AND DISPLAY TWO DIFFERENT TEMPERATURES USING YOUR COMPUTER'S SERIAL PORT Not only will this cost-effective unit measure and display temperatures, it can notify you when levels drop below freezing. by Ray Green Related Information
PRINTED CIRCUIT BOARD DESIGN/PROTOTYPING BASICS If you want your product or project to look its best, you should get a printed circuit board designed and built. by Danny R. Graves
COLUMNS
AMATEUR ROBOTICS Intelligent power pack for your robotic project.
ELECTRONICS Q&A What's Up: The mysterious crystal oscillator finally defined (hopefully). An IR remote control repeater shines, and does a new candle flicker circuit. Specialty electrolytic capacitors are spotlighted, and an old science fair project resurfaces.
IN THE TRENCHES For Design Engineers facing real-world problems. This month: A primer on testing.
JUST FOR STARTERS Basics for beginners. This month: Dealing with diodes.
LASER INSIGHT Learn the many dimensions of holography.
OPEN COMMUNICATION Home networking with power-line technology.
ROBOTICS RESOURCES Plastics for your robot creations.
STAMP APPLICATIONS Thinking Like An Embedded Programmer: How to keep your Stamps thin and trim and running efficiently.
TECHKNOWLEDGEY 2003 Scatterometer now sending high-res earth images; New worm is spreading; A PC for bottom feeders; Human transport device: has the revolution fizzled!; Isolators replace standoffs; Stun intruders with 50,000 volts; Dell still beating the trends; and Technology scores low in survey.
