| In this article we discuss and respons the questions and advices of our readers.
More about LED (745)
| 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...
| Being an all-solid-state design you don’t have to tap on this barometer to get the latest air pressure reading!
| The consumer unit (or ‘electricity meter’) cupboard in some older houses is a badly lit place. If the bell transformer is also located i...
| Over the years this magazine has published a variety of light dimmers. Invariably, these were designs based on discrete components. Th...
| Since the 1960s, light-emitting diodes (LEDs) have come into use for many applications. Many people may not know that these diodes, used i...
| One obvious, perfectly normal and socially accepted way of seeing if somebody is at home is to ring the doorbell. Unfortunately, burglar...
| The preamplifier is intended for use with dynamic (moving coil – MC) microphones with an impedance up to 200 Ω and balanced terminals. I...
| The circuit in the diagram was originally designed to monitor an oscillator, but can also be used as a general-purpose level indicator f...
| The simple indicator presented in this article may be combined, in principle, with any circuit that contains an LED bar display driven b...