Klemens Viernickel (8)

1-05-2006 | Lots of circuit variations exist on this theme. We would like to add one more, however, that’s not easily beaten for simplicity and reliabil...

1-03-2006 | When dealing with relays we distinguish between the pull-in voltage and the hold voltage. Depending on the type of device, the latter is fro...

1-03-2006 | Opamps seldom have an output current drive capability of greater than about 12 mA, and so they are not suitable for use in 20 mA current loo...

1-05-2000 | The halogen or krypton bulbs in modern torches (USA and Canada: flashlights) have a limited life and are not particularly cheap. A simple mo...

1-12-1999 | Anyone who overclocks the CPU of a PC lives in constant fear of having the processor fail due to overheating. A permanently-installed temp...

1-03-1999 | With the introduction of the AMD K6, Cyrix 6x86 and Pentium MMX processors, a second supply voltage is required on the motherboard in addi...

1-07-1996 | This monitor is used by the author to guard the microprocessor in his PC. The temperature sensor is a resistor, Rq, with negative temper...

1-06-1996 | In some situations, for instance, in education or in process contra I systems, it is practical to have at least two keyboards connecte...