More about LED (794)

1-12-1994 | Standard potentiometers have some unfortunate properties, such as crackling when they get older and unequal tracking in stereo types. A...

1-12-1994 | The display is intended as a turning indicatoror a VU meter on a stereo FM radio. The first function is selected by pressing S1 (which m...

1-09-1994 | This inexpensive oscilloscope can be used at frequencies up to 20-30 kHz (optionally up to 1 MHz). It works from 12 V and can thus be use...

1-07-1994 | The hot-plate was designed to keep a tray with developer for print material warm. It may also prove useful in a photographer's dark-room...

1-07-1994 | Building an LCD module into an equipment (for instance, a voltmeter into a power supply) is often not straight forward, because its supp...

1-07-1994 | Infra-red remote control units for TVs and video recorders usually have a large number of press-keys to select a staggering variety of fun...

1-07-1994 | The CD4046 is an integrated phase-Iocked loop (PLL) with integral voltage-controlled oscillator (VCO) that is used in many digital circu...

1-01-1994 | The switching unit described here is capable of controlling up to seven mains-powered loads with the aid of commands received via telephon...

1-12-1993 | Nowadays, several manufacturers produce ICs that combine an infra-red receive LED with associate amplifier and demodulator. The Type SFH5...

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...