H. Bonekamp (119)

1-12-1998 | Over the years this magazine has published a variety of light dimmers. Invariably, these were designs based on discrete components. Th...

1-12-1998 | When construction of the barometer/altimeter, which is based on a precision airpressure sensor with integral signal processor from Mo...

1-12-1998 | The Type NH-3 humidity sensor used in the ‘automatic air humidifier’ (July/August 1998) may be replaced by a lightdependent resistor, LD...

1-12-1998 | The input impedance of a.c.-coupled op amp circuits depends almost entirely on the resistance that sets the d.c. operating point. If CMO...

1-12-1998 | A photo-diode is a p-n diode whose reverse current depends on the amount of light falling on its junction. The reverse current is greatl...

1-12-1998 | The current source in the diagram, which react very fast to changes in the input signal, may be used, for instance, in certain measureme...

1-12-1998 | The consumer unit (or ‘electricity meter’) cupboard in some older houses is a badly lit place. If the bell transformer is also located i...

1-11-1998 | It is just about ten years ago that this magazine published the design of a barometer/altimeter. In these ten years electronics techno...

1-07-1998 | This is an electronic equivalent of the traditional builder’s spiritlevel using a small glass tube nearly filled with alcohol but contai...

1-07-1998 | The modem off indicator is intended especially for serious Internet surfers. It will be seen that the circuit of the indicator cannot be...