Elektor Team (9531)

1-07-1986 | 1 The environmental nuisance value of discos is in direct proportion to their sound level. The circuit proposed here cannot be disabled by t...

1-07-1986 | 104 184 As already reported on numerous oc- casions in this magazine, the BBC micro ranges among the most widely used types of personal comp...

1-07-1986 | C1 100p 15V This low-cost timer circuit can offer switching intervals up to about 24 hours and may, therefore, be useful for a variety of do...

1-07-1986 | from an idea by R Conell 106 861digital volume control UP 91 R12 DOWN 3 17 VPP R17 12GNI/ IC1 EE July/August 1986 This digital potentiometer...

1-07-1986 | courtesy light delay 87 Ever been groping about for the safety belt, ignition slot, choke con- trol or a map while in utter darkness and hap...

1-07-1986 | EE July/August 1986 881LED revolution counter A close look at the dashboards of a number of cars may reveal the use of three basic types of...

1-07-1986 | C G Mangold 89 audio-controlled mains switch EE 110 July/August 1986 It is often useful for audio or video equipment to be switched off auto...

1-07-1986 | 190NiCd battery chargers Quite arguably, Nickel Cadmium (NiCd) batteries are frequently used as replacements for disposable types of battery...

1-07-1986 | Here is a circuit that produces a negative voltage from a positive one, for instance, from +5 V to -10 V. The output voltage, Uo, is determi...

1-07-1986 | EE 112 July/August 1986 192microphone-signal processor D1 In broadcasting systems, intercoms, and mobile radio telephones it is necessary to...