This sensitive touch key appears on this website from other sources. This version was taken from a 90s American documentation. The source must not be of transformerless type.
This circuit was found in a publication by Gernsback from 1960. The circuit generates signals from...
This oscillator has the output sine waveforms stabilized by a MOSFET. Equivalent types can be...
This circuit that uses components that are still very common on the market was obtained in a 1997...