| 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...
More about oscillator (484)
| 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...
| july/august 1984 A for short-wave receivers Many short-wave listeners often wish their receiver could be extended above 30 MHz. The converte...
| elektorjuly/august 1983 1 Parts List Resistors R1=100k simple D/A converter given in figure 2 in which the latch (I C1), comparator (1C2 and...
| 103 universal AFC This AFC is suitable for frequencies up 100 MHz and for use in frequency generators, waveform generators and all sorts of...
| A with six switchable settings Most asynchronous receiver/transmit- ters (generally known as UARTs) operate at a clock frequency which is si...
| with moving-coil instrument An LC meter is undoubtedly in- dispensable to anyone involved in h.f. techniques. The present design accepts the...
| a simple resonant frequency meter Way back when electronics was still young (shortly after the stone age) when grids, anodes and cathodes we...
| exotic, perhaps, but not esoteric Perhaps it is a longing for nature in our technological society that prompts so many readers" requests for...
| 36 30 68 60 70 d.c. voltage doubler using a 4049 This simple circuit can produce a d.c. voltage which is approximately twice the supply volt...