More about relay (97)

1-07-2004 | Switched mode power supply units (SMPSUs) are popular but difficult to build oneself as well problematic when it comes to understanding thei...

1-07-2004 | This circuit proves that microcoprocessors, PCs and the latest ultra-accurate DACs are overkill when it comes to controlling four relays in...

1-07-2004 | Some relays will become warm if they remain energised for some time. The circuit shown here will actuate the relay as before but then reduce...

1-07-2004 | With battery-operated equipment there’s always the risk of batteries being inserted the wrong way around. Although a diode or a bridge recti...

1-12-2003 | With extended periods of bright sunshine and warm weather, even relatively large storage batteries in solar-power systems can become rather...

1-12-2003 | Relays are often used as electrically controlled switches. Unlike transistors, their switch contacts are electrically isolated from the cont...

1-12-2002 | Bistable relays are particularly useful in applications where very low power consumption is important. This is because they only use a littl...

1-07-2002 | There exist special types of relay that have peculiar characteristics. Next to the ‘normal’ types in the catalogue we find the so-called ‘la...

1-03-2002 | The DMX demultiplexer, which was described in Elektor Electronics recently, enables you to drive eight analogue outputs with a control volta...

1-01-2001 | In many circuits the switching action is performed by a relay, which in turn activates an external load. This part of the circuit is rarely...