More about light (490)

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...

1-12-1997 | The microcontroller-driven light barrier operates with two infra-red senders which, if set up correctly provide a measure of directivity.

1-10-1997 | This article describes a lights switch which is operated by moving your hand in front of it. This is achieved by detecting infrared lig...

1-07-1997 | The Type HA7210 IC from Harris Semiconductor is an integrated low power crystal oscillator that can be programmed extremely to generate...

1-07-1997 | The Type TSL230 IC is a programmable light-to-frequency converter it is a single-chip combination of a silicon photodiode and a current-t...

1-06-1997 | The ignition warning light in a car indicates whether the battery is being charged or not (and indeed whether it is connected properl...

1-02-1997 | Flexible tubelight units containing many vividly coloured lights are very popular ornaments these days, and they are seen in many shop...

1-12-1996 | The article describes a remote control (send/receive) system that does not use infra-red light, but visible light. It is particularly...

1-12-1996 | Digital systems need an interface to communicate with the outside world. Since only voltage drops can be used by the hardware, auxiliary...

1-12-1996 | The presenr circuit, consisting of only a handful of cornponents, enables a rnains-operated lamp to flash at Intervals of about one seco...