This constant current source for high voltage loads was obtained from a 1967 General Electric documentation. The components are of the time, but allow equivalents.
This circuit can be used with older tape player systems to recover media converting for digital...
One flip-flop of the 4018 can be used as a frequency divider or counter as shown here. Frequency...
The AC125 transistor is an ancient germanium type widely used in audio stages as a preamplifier. In the...