This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
The circuit triggers a warning system after the programmed time interval. The circuit uses a CMOS...
This crystal-controlled oscillator was obtained from an American 1980s documentation. The circuit...
This circuit can be applied to several logics. The circuit is from an Electronics Now from the...