| Simple triangle-wave generators have a weakness in that the waveform of their output signal normally cannot be modified. The circuit pre...
Ulrich Kunz (6)
| The audio signal is applied to the indicator circuit via a 1:1-1:4 microphone transformer. Its level determines which of the two lamps. L,...
| This article describes a 3-transistor test transmitter tor the popular 27-MHz (11-metre) band, which is used tor short-range communication...
| This converter enables long-distance (DX) reception of AM or SSB stations in the 27-MHz citizens' band (CB) on a short -wave or medium wav...
| To prevent the dynamo-driven lights of your bicyle going out when you stop in the dark for, say, traffic lights, the simple circuit here...
| The circiut shown here generates a pulse train in which the width of each individual pulse is determined by a control voltage. This prope...