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.
November 2016 - The new Ohmite TO-126 power resistors in the range of 0.09 Ω to 51 kΩ with...
With this circuit found in an American documentation from 1969 it is possible to vary the...
This circuit was found in the June 1991 issue of Radio Electronics magazine. The circuit uses two...