Elektor Team (9517)

1-07-1988 | EE JULY/AUGUST 1988 This printed circuit board is ideal for building and testing experimental ex- tension circuits for a wide range of com-...

1-07-1988 | Although tone control is not desirable in good-quality audio equipment, there are still instances, such as when playing well-used records, w...

1-07-1988 | 00 DMM AS FREQUENCY METER By providing a high-input-resistance multimeter (preferably of the digital type) with a frequency-to-voltage con-...

1-07-1988 | 00 Anyone interested in the reception of radio teletype traffic will appreciate the programmable audio filter described here, which may be f...

1-07-1988 | 00 The circuit described here enables short-circuit protection and power-on delay to be added to a power supply. Power supplies with a large...

1-07-1988 | 00 Many cars are fitted with some sort of alarm system as protection against petty criminals and joy riders. Most of these systems rely on a...

1-07-1988 | Described is a digital panel meter- DPM-which is built around a special meter-IC, Type ADD3701, and may be used for the accurate measuring o...

1-07-1988 | Repairs to the e.h.t. section of a monitor or a television receiver always carry a certain amount of risk. It makes sense, therefore, partic...

1-07-1988 | 00 While experimenting with electronic circuits, it will often be necessary to rap- idly test bipolar transistors and FETs before they are f...

1-07-1988 | 0I It is sometimes desired to use a BC547 at rather higher voltages than permitted according to the data book. Yet, it can be done by connec...