Elektor Team (9517)

1-07-1984 | switches itself on (and off) This circuit forms a switch that can be triggered on (or off) at the onset of darkness and remain active for a...

1-07-1984 | humane solution to an old problem This mousetrap is not intended to kill a mouse with the aid of electronics, but rather to imprison it in a...

1-07-1984 | july/august 1984 react at the speed of light The human eye has a certain "built- in" delay. This fact is used for films, TV sets, and fluore...

1-07-1984 | for keeping nasty rodents at bay Most of us will agree that rats and mice are generally not the most welcome visitors to our homes. At the s...

1-07-1984 | motion study by flash-light WARNING! The circuit of the stroboscope is connected directly to the mains and experiments on the opened unit ar...

1-07-1984 | space saving and cost effective Warning! This circuit needs to be constructed and wired with the greatest care as the full mains voltage is...

1-07-1984 | with variable gain The design for the circuit here was created when problems arose with the matching of some output stages with a preamp. In...

1-07-1984 | depends on channel separation Weak VHF/FM signals, particularly stereo broadcasts, are normally received against a background of noise. When...

1-07-1984 | july/august 1984 A for short-wave receivers Many short-wave listeners often wish their receiver could be extended above 30 MHz. The converte...

1-07-1984 | for the VDU card with the CMOS Junior The VDU card published in Elektor number 101, September 1983, sometimes lets noise appear on the scree...