More about light (490)

1-12-1998 | Over the years this magazine has published a variety of light dimmers. Invariably, these were designs based on discrete components. Th...

1-12-1998 | This circuit was originally designed to control the brightness of an electric torchlight, but may find many other applications because o...

1-12-1998 | This circuit shows that only a handful of parts is needed to make a light-controlled switch with a digital power buffer output capable o...

1-12-1998 | Button or coin cells that appear to be flat in their normal function may yet be discharged further. This is because in many cases, for i...

1-12-1998 | The alarm circuit uses infra-red light beams to bridge distances between 3 m and 5 m (10 ft to 16 ft), but if the transmit diode is give...

1-12-1998 | The consumer unit (or ‘electricity meter’) cupboard in some older houses is a badly lit place. If the bell transformer is also located i...

1-10-1998 | Lots of advanced joystick units are available in the computer shops for pretty realistic control of various flight simulator programs. Bui...

1-09-1998 | In an earlier article on light intensity measurement using the PC (Elektor Electronics February 1998 Supplement) it was claimed that accur...

1-07-1998 | Although the timer was designed specifically for use with an ultra-violet-light box, it may, if course, be used for other purposes as we...

1-07-1998 | Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit pre...