More about magnet (157)

1-07-2006 | The schematic of our preamplifier is very simple because it uses a very low-noise dual operational amplifier. Here the NE5532 is used, whose...

1-07-2006 | How often does it happen that you close down Windows and then forget to turn off the computer? This circuit does that automatically. After W...

1-06-2006 | Metal tools, in particular screwdrivers, may become magnetic. The powerful magnets in loudspeaker drive units fitted close to the tool stora...

1-03-2006 | A linear motor is simply one which produces motion in a straight line rather than in a circle. We give an overview of the technology and its...

1-06-2005 | Mobile telecom operators are rolling out the systems they hope will recover the billions invested in 3G licences for the new UMTS services....

1-06-2005 | UK mobile telephony providers are busy rolling out their nationwide 3G network for UMTS. According to a cautious estimate, it will eventuall...

1-06-2005 | The debate concerning the possible harmful effects of electrical and magnetic alternating fields in our environment goes on. The only thing...

1-05-2005 | How do you know accurately if a magnet is stronger or weaker than one you’ve dubbed your reference device? This simple to build instrument h...

1-04-2005 | At the end of his scientific research carried out in 1887/1888 Heinrich Hertz was able to prove the existence of electromagnetic waves and d...

1-04-2005 | This month we look at an everyday item: the humble coin, be it a 2-pound, or a 1- or 2-euro piece. Money, including coins, seems to have a s...