Elektor Team (9531)

1-07-1989 | 16 One of the difficulties in the design of high- er-order tuneable band-pass filters is achieving correct tracking of the variable resistor...

1-07-1989 | 023 CAR HEADLIGHT CONTROL It is an annoying fact that you normally only realize that you have left your car headlights on when you want to r...

1-07-1989 | 024 COMPUTERS Most advanced computer programs include preventative measures against (possibly) hasty instructions. Responses such as "are yo...

1-07-1989 | 025 BICMOS INTEGRATED CIRCUITS BiCMOS devices combine bipolar and cmos technologies, pro- viding the best features of both: the fast perform...

1-07-1989 | 18 026 GENERAL INTEREST The programmable switch may be used, for instance, to simulate a data stream or, as 1 KBM 6 er may be used as the ba...

1-07-1989 | 027 SWITCH-MODE VOLTAGE REGULATOR Switch-mode power supplies offer the user the benefit of a much greater efficiency than obtainable with a...

1-07-1989 | * See text 028 RADIO & TV The transmitter was designed primarily for use by radio ama- teurs as a radio beacon and as such it provides a goo...

1-07-1989 | 20 029 The resolution of moving-coil meters is general- ly no better than 1%, because the scale normally is given no more than 100 marker li...

1-07-1989 | 030 AUDIO & HI-FI SOUND LEVEL ATTENUATOR When the radio or record player is on at a fairly high volume, it is often impossible to hear the t...

1-07-1989 | 031 COMPONENTS FAST UNITY GAIN OPAMP A number of operational amplifiers can be used only in circuits that have a certain mini- mum amplifica...