More about LED (792)

1-12-1998 | Being an all-solid-state design you don’t have to tap on this barometer to get the latest air pressure reading!

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...

1-09-1998 | Since the 1960s, light-emitting diodes (LEDs) have come into use for many applications. Many people may not know that these diodes, used i...

1-07-1998 | One obvious, perfectly normal and socially accepted way of seeing if somebody is at home is to ring the doorbell. Unfortunately, burglar...

1-07-1998 | The preamplifier is intended for use with dynamic (moving coil – MC) microphones with an impedance up to 200 Ω and balanced terminals. I...

1-07-1998 | The circuit in the diagram was originally designed to monitor an oscillator, but can also be used as a general-purpose level indicator f...

1-07-1998 | The simple indicator presented in this article may be combined, in principle, with any circuit that contains an LED bar display driven b...

1-07-1998 | There can be no doubt that Microchip’s PIC microcontrollers have achieved general acceptance in the electronics industry and immense pop...

1-07-1998 | To many hi-fi enthusiasts and musicians, the thermionic valve (electron tube), the sound of a valve amplifier cannot be bettered by that...

1-07-1998 | How many different conditions do you reckon may be signalled with just one LED? Two, maybe three? Using this simple circuit, a lot more!