Elektor Team (9531)

1-07-1986 | EE 40 July/August 1986 151thermostat-controlled soil heating Many people with a keen interest in growing plants insist on the fact that many...

1-07-1986 | This circuit provides motor-cycle riders with a gear indication to the foot-operated lever at one side of the engine block. The proposed ind...

1-07-1986 | industrial-clock controller 171 At the same time, bistable IC5 toggles and causes the bridge circuit composed of T2. . .T8 to reverse the mo...

1-07-1986 | Alan G Hobbs 18telephone-bell simulator This circuit is intended for use in a small private telephone installation. The ringing tone sequenc...

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...