Elektor Team (9517)

1-07-1986 | +12V p" 0 10n 12V 8OrnA max This timer automatically switches off equipment left operating unattended for more than about thirty minutes. Th...

1-07-1986 | EE 44 July/August 1986 AN OPTICAL-FIBRE NETWORK FOR OFFICES, FACTORIES AND HOSPITALS A very versatile experimental local telecommuni- cation...

1-07-1986 | EE July/August 1986 20four-tone siren This interesting little circuit is par- ticularly aimed at modellers. Based on just one IC, it is easy...

1-07-1986 | 21 1 car lights monitor L3 = 20turns M van Oosten Ll = 1 Burns L2 = 1 Burns Many traffic accidents are caused by failing car lights. Often,...

1-07-1986 | Since many amateur receivers are fit- tedwithanSmeterthatfunctionsfar from logarithmically, the proposed circuit should be a welcome exten-...

1-07-1986 | EE July/August 1986 "Alea iacta est" (the die is cast, freely) someone said quite a few years ago, and promptly engaged in sundry military a...

1-07-1986 | Despite its neat design and relatively low cost, the Acorn Electron corm puter suffers from an unfortunate lack of I/O support, which is rem...

1-07-1986 | EE 50 July/August 1986 A B Bradshaw 5 line bar generator 0 12V/80 mA 2 20k 6 IC1 IC2a 56p IC2b 37 11 7k 7 4R1P3144 R30 10k 2 I0On • see te...

1-07-1986 | 1262708 alternatives Thanks to the development of an ever expanding range of capacious EPROMs in the 27xxx and 25xxx series, the Type 2708 h...

1-07-1986 | smart LED selector I In this tiny circuit, for use in, for in- stance, a two-lights model railway signal, one of two LEDs may be selected wi...