| DIGITAL ECHO UNIT EG1000 design: ELV GmbH The EG1000 echo/reverberation unit uses delta-modulation on a digital basis, and is capable of pro...
| DIGITAL ECHO UNIT EG1000 design: ELV GmbH The EG1000 echo/reverberation unit uses delta-modulation on a digital basis, and is capable of pro...
| 60 SEMICONDUCTOR DIODES by T. Wigmore Although many readers know perfectly well what a diode is, it does no harm to repeat its definition he...
| INTERMEDIATE PROJECT A series of projects for the not-so-experienced constructor. Although each article will describe in detail the operatio...
| THE DIGITAL MODEL TRAIN PART 4 by T. Wigmore Universal signals and switching decoder The points (turnout) decoder described in Part 1 of thi...
| 18 ANALOGUE ML LTIMETER by T. Giffard An advanced electronic multimeter with no fewer than 80 ranges and easily reproducible accuracy. An im...
| 26 SCIENCE & TECHNOLOGY Forecasting flickers in the field by Dr Bill Stuart, Geomagnetism Research Group, British Geological Survey, Edinbur...
| 30 PRACTICAL FILTER DESIGN (5) by H. Baggott Last month we discussed the design of wide band-pass filters. This month"s instalment in the se...
| RADIO DATA SYSTEM (RDS) DEMODULATOR sources: European Broadcasting Union; Philips Components design: J. Bareford After several years of stud...
| 39 A CLOSER LOOK AT THE TRANSPUTER by Pete Chown The transputer is probably the most powerful microprocessor available today; ironically, it...
| 45 DUAL-TONE MULTI-FREQUENCY DECODER source: Teltone Corporation design: Robert Krijgsman PE ICHY The dual-tone multi-frequency (DTMF) diall...