K. Walraven (99)

1-07-1998 | If there is one thing that a lead-acid battery does not like it is persistent neglect. When such a battery is being discharged, its en...

1-07-1998 | This magazine regularly publishes news about new families of logic circuits. Last year, for instance, attention was drawn to the AHC (ad...

1-06-1998 | Developments in the world of rechargeable batteries, and the new models that have appeared in recent years, such as the metal hydride...

1-05-1998 | A measurement of the e.m.f. of a battery (dry or rechargeable) does not say anything about the condition of the battery or its constituen...

1-03-1998 | The variable power supply described in this article is the latest in a long line of power units published in this magazine over the past...

1-03-1998 | This is the third and last in a series of three miniature designs for beginners in electronics. Each of the designs is powered by a 3...

1-12-1997 | With the Festive Season approaching rapidly, many of you will be thinking hard how to give this coming Christmas a very personal touch...

1-09-1997 | A relay is still one of the simplest devices for switching large electrical loads with the aid of a relatively small amount of energy....

1-07-1997 | If you are after a small, reliable and inexpensive switch-mode power supply, National Semiconductor's LM257x series of switch-mode power...

1-12-1996 | When playing an electric guitar, you often have to use one or more effects units, since each and every kind of music played on the gui...