Elektor Team (9510)

1-07-1979 | This circuit for a frequency meter offers six ranges: 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz and 10 MHz. Switching between ranges is per-for...

1-07-1979 | Recharging lead-acid batteries is often assumed to be an extremely straightforward matter. And that is indeed the case, assuming that no spe...

1-07-1979 | When we first published a circuit in last year`s Summer Circuits issue which was designed to `kill` the sound of a DJ`s voice between recor...

1-07-1979 | The following circuit is an improved version of the harmonic distortion meter published in the 1977 Summer Circuits issue. In place of trans...

1-07-1979 | When considering constructing a `wireless` headphones system, three basic approaches present themselves: a `genuine` r.f. transmitter and re...

1-07-1979 | A high quality servo amplifier can be built using only one IC and a handful of passive components. The SN28654 (Texas Instruments) contains...

1-07-1979 | Before going on to describe the circuit of the receiver, there is one point worth noting. Although primarily intended for use in an ultrason...

1-07-1979 | A frequency counter is an extremely usefu I tool for tuning the voltage controlled oscillators (VCOs) of a synthesiser both quickly and accu...

1-07-1979 | If not always for exclusively technical reasons, output level meters are a particularly popular type of circuit, especially in audio applica...

1-07-1979 | With the printed circuit board design given here, it is possible to obtain an `inclusive always` gate by mounting wire link `a ` , or an `ex...