Elektor Team (9534)

1-07-1989 | 009 RECORDING CONTROL AUDIO & HI-FI The circuit presented here is intended as a recording level control for cassette recorders. It enables t...

1-07-1989 | 010 CHILD-PROOF RESET SWITCH The reset switch on a com- puter is a very important con- trol. If an operating instruction threatens to wreck...

1-07-1989 | 10 011 GENERAL INTEREST Battery-operated equipment can work on one set of batteries for a long time nowadays. But if it is left on inadverte...

1-07-1989 | 012 The TL496 is an is that is intended to produce a nominal 9-volt, that is 7-10 V, supply voltage from a variety of sources. This sup- ply...

1-07-1989 | 013 TEST & MEASUREMENT ABS / RMS / LOG CONVERTER The converter is specially intended for use in audio applica- larly suitable. The is derive...

1-07-1989 | 014 AUDIO & HI-FI The proposed mixer is designed around four current-driven transconductance amplifiers contained in a Type SSM2024 from Pre...

1-07-1989 | 015 COMPUTERS The "64 Kbyte RAM extension for msx computers"(Ref. 1) can house moms, but there is a small problem. To keep the board lay- ou...

1-07-1989 | 016 RADIO & TV This squelch circuit is simple, universally usable and provides a large enough gain to enable it being incorporated in the au...

1-07-1989 | 017 48 MHZ CMOS OSCILLATOR Crystal oscillators using digital gates generally do not generate frequencies above 30 MHz, because the necessary...

1-07-1989 | SIMPLE TEMPERATURE INDICATOR For the absolute measurement of tempera- tures a thermometer is indispensable. There are, however, many situati...