Electronics Now articles from December 1993

Electronics Now archives from December 1993

Electronics workbench circuit simulator. (Interactive Image Technologies Ltd.) (Equipment Reports)
December 1, 1993... Electronics is one subject that can't be learned with the help of books alone. Hands-on experience is essential for students who want to gain an understanding how components work and to become familiar with test equipment. Unfortunately, many...

Build a micro TV transmitter. (Cover Story)
December 1, 1993... This wireless mini video transmitter sends a picture to your TV set. It's ideal for security monitoring or observing nature. THE MINIATURE SINGLE-BOARD VIDeo camera used in this project is an excellent example of how recent advances in...

High tech Xmas ornaments: add an electronics theme to your Christmas decorating with the visible components.
December 1, 1993... CHRISTMAS WOULDN'T SEEM COMplete without at least one electronics project to add a little holiday spirit. This year, build the Visible Components, three light-up ornaments that take on the appearance of three common component symbols: a resistor,...

Audio scrambling system.
December 1, 1993... Prevent eavesdropping by scrambling and descrambling your telephone conversations. THERE ARE MANY INSTANCES where some form of speech encryption is needed for privacy or security. Complex and costly voice-scrambling systems are common in...

The photoresist method: learn how to use the photo-resist method for making your own PC boards.
December 1, 1993... ANYONE CAN MAKE PROFESSIONAL single- and double-sided prototype circuit boards using just a few basic materials and techniques. The techniques shown in this article will allow you to produce a PC board for your prototype in a matter of hours....

Oscillators.
December 1, 1993... Learn about transistor oscillators and multivibrators that generate useful sine and square waves. OSCILLATORS BASED ON THE BIpolar junction transistor (BJT) are the subjects of this article. Previous subjects in this series have included an...

Electronic noise. (techniques in minimizing internal electronic noise)
December 1, 1993... If you know what causes internal electronic noise you can select components to minimize its effect on your circuit WE RECOGNIZE TWO KINDS OF ELECtronic noise--external and internal. External noises can be man-made--originating from such sources...

Static ROM: build your own EPROM emulator for less than $60.00! (read only memory; erasable programmable read only memory)
December 1, 1993... THIS ARTICLE IS DEDICATED TO ALL electronics experimenters who have discovered the microcontroller. Developing a new microcontroller-based project is rewarding, but it can be difficult even with the aid of a microcontroller simulator. After all,...

Cable conflicts: the mysteries of getting wired. (Audio Update) (Column)
December 1, 1993... If I had read that Senator Jesse Helms had suddenly become an avid supporter of the Equal Rights Amendment, I could not have been more startled than I was by a speaker-cable article in the July issue of Audio magazine. Originally the organ of...

We're finally free to play our game without performing the document check! (Drawing Board) (Column)
December 1, 1993... If you've been following this series on software debugging (it's been discussed in the July, September, and November issues of Electronics Now), you now know the basic steps to getting rid of a document check. The job involves locating the...

The holy grail of the computer industry. (developing simpler computers) (Computer Connections) (Column)
December 1, 1993... Layering is a fundamental concept in the computer industry. It is useful because it allows us to compartmentalize portions of problems that would otherwise appear overwhelmingly complex. Compartmentalization is useful for science and engineering....