Elektor Team (9512)

1-09-1987 | EE 54 September 1987 UNIVERSAL EPROM EMULATOR Any EPROM can be emulated by a RAM with double access: one for reading, and one for writing. T...

1-09-1987 | The most serious problem with ordinary cross-over filters is best illustrated with reference to a two-way system. This con- sists of a low-p...

1-09-1987 | Construction The network is most con- veniently constructed on the ready-made PCB Type 87109 shown in Fig. 5. The values of the components g...

1-09-1987 | EE September 1987 16 KBYTE CMOS RAM FOR C64 by P Verhoosel A non-volatile block of RAM or pseudo-ROM for plugging into the Commodore 64"s ex...

1-07-1987 | by J Donhauser This rear light for bicycles is fed from a battery charged with current from the dynamo, and starts to flash when the cyclist...

1-07-1987 | From an idea by F Berben Although joysticks come in an astounding variety of versions, their internal organization is vir- tually always a s...

1-07-1987 | Many of today"s HiFi amplifiers feature a "clicking" volume control, but this is only rarely a real stepped attenuator based on a wafer swit...

1-07-1987 | EE JULY/AUGUST 1987 Simple DC operated motors with a permanent magnetic stator behave as an indepen- dently energized motor. The speed of an...

1-07-1987 | by P Needham this is either Rs, Rs //Rs, or Rd/Rs. A difficulty arises if it is intended to provide an overcur- rent indication for the shut...

1-07-1987 | EE JULY/AUGUST 1987 This code lock provides a high degree of security whilst being a very simple design. At the heart of the circuit is the...