Burkhard Kainka (226)

1-09-2003 | It’s probably the worst nightmare for all PC owners: The fan has been quietly doing its job keeping the PC internals nice and cool but over...

1-02-2003 | Ordinary proximity detectors use infrared sensors which respond to the warmth of the human body. But there’s a simpler way: we can use ambie...

1-12-2002 | The valve detector receiver is the logical extension of the crystal detector. This circuit can achieve astonishingly good selectivity, since...

1-12-2002 | Inexpensive receivers for standard infrared remote control units for television sets and video recorders are available in the form of integr...

1-12-2002 | External components have to be used whenever the number of port lines on a microcontroller is insufficient. And when you need to process ana...

1-10-2002 | With the test probe secure (you hope) on the resistor leg, turning your head to view the voltmeter indication is not always a good idea. Whi...

1-09-2002 | We have received many questions from readers regarding our microcontroller course. The most interesting questions are summarised in this lis...

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...

1-07-2002 | Communication over the IrDA port uses a relatively complex protocol but its possible to send a single character using just a few components....

1-07-2002 | A universal voltage tester should respond to both dc and ac voltages. The usual types with glow-discharge lamps only work with voltages grea...