K. Walraven (99)

1-07-1994 | It is often handy if two or more sets of equipment that work together, such as a computer and a printer, or a tuner, amplifier and CD pl...

1-07-1994 | The lead-acid battery forms the heart of the electrical system in any car. If you are on a camping or caravanning holiday, it can happen th...

1-07-1994 | Quartz crystals are ground by the manufacturers to oscillate either on the fundamental frequency or on one of the odd harmonics (overton...

1-06-1994 | The I²C interface was originally developed by Philips Components to enable complex integrated circuits to communicate using a simple bidir...

1-03-1994 | We tend to forget about fuses until one has blown, when it is time to locate and investigate an electrical overload problem. Once that is...

1-12-1993 | Many of the less expensive shortwave receivers have no squelch circuit and continue to emanate noise when no usable signal is coming in....

1-12-1993 | It had to come: an LED that can produce all visible colours. It Is the Everlight Type 339-1 VRKGBBW. In fact, it consists of four LEDS in...

1-12-1993 | This is one of the simplest twilight switches ever published in this magazine. When it gets dark, the value of light-sensitive resistor R...

1-12-1993 | When batteries are charged rapidly. the manufacturer usually recommends that after every fifth fast charge there ts a 'normal' charge, th...

1-12-1993 | Nickel-metal-hybride (NiMH) batteries have now become widely available. A typical one is the 120AAH, which has a capacity of 1.2 Ah in si...