Found in an American documentation from 1968, this circuit uses transistors from the time. The circuit can be adapted to use equivalent modern components.
This sensitive touch key appears on this website from other sources. This version was taken from a...
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
CMOS 4046 (PLL) is not very common. In this circuit it generates short pulses to excite a high...