Electronics Now articles from December 1994

Electronics Now archives from December 1994

Hewlett-Packard HP973A digital multimeter. (Equipment Reports) (Evaluation)
December 1, 1994... When you want to step up to a better handheld digital multimeter, step up to a Hewlett-Packard. If you are a typical Electronics Now reader, you probably own your own handheld digital multimeter (DMM). Chances are you bought it years ago when...

Build the retro-remote. (remote control device) (Cover Story)
December 1, 1994... Add remote-control capability to anything that doesn't have it already with the Retro-Remote. ONE MAJOR FEATURE THAT SEPArates most consumer electronics from home-built gear is remote-control capability. Even some of the most inexpensive...

Build micro lights. (flashing lights)
December 1, 1994... Learn how the PIC16C71 microcontroller works and produce your own mini light show with Micro-Lights. FLASHING LIGHTS ATTRACT THE ATtention of people and can lure or warn them. Police cars and ambulances are equipped with flashing lights....

Solving the resistor cube.
December 1, 1994... Solve the resistor cube, an interesting puzzle in electronics. THE RESISTOR CUBE HAS BEEN A challenge for electronics students for many years. Basically the resistor cube is a three-dimensional construct of 12 resistors of equal value connected...

Sweep/function generator.
December 1, 1994... Build this sweep generator to create sine, triangle, and square waves and provide a horizontal sweep for an oscilloscope FUNCTION GENERATORS ARE VERY important and versatile test instruments capable of providing a variety of waveforms over a...

Tone decoder. (on National Semiconductor's LM567 integrated circuit)
December 1, 1994... Learn more about designing with the tone decoder, a versatile circuit that includes a phase-locked loop and responds to selected input frequencies THIS ARTICLE, THE FOURTH IN A SEries on phase-locked loops, is about a tone and frequency...

Power supply regulation.
December 1, 1994... Learn the strengths and weaknesses of the two principal off-line power supplies--linear- and switching-regulated. A POWER SUPPLY IS A CIRCUIT THAT converts alternating current or unregulated direct current to regulated direct current to meet...

Powerful new PIC software, unique direct-toner decals, and long-range remote control. (program-interrupt controller) (Hardware Hacker) (Column)
December 1, 1994... The FCC has long been strict about unlicensed transmitters. Most of the time, legal, unlicensed transmitters are not particularly useful. But there is one class of unlicensed transmitters that the FCC permits to operate at ten times the usual...

Listening to digital compression. (Audio Update) (Column)
December 1, 1994... For most audiophiles, compression implies a slightly disreputable and little-understood back-room engineering practice. In truth, however, it is a necessary fact of life faced by recording and broadcast engineers, who are daily forced to limit...