Active with the output at the high level, this oscillator was found in November 1984 Radio Electronics magazine. The supply can be between 3 and 12 V and the output signal is rectangular.
This circuit was found in the 1992 Radio Electronics Handbook. It is used to test VCR recording heads....
This circuit turns a relay on or off by touching the sensors or by connecting sensors at these...
This article is from the Italian magazine Sperimentare number 11 of 1975. It can be assembled with...