This circuit was found in a 1969 Mullard publication. The transistor may be the modern equivalent of BC548. Observe the relatively high supply voltage.
We found this logic level tester in a 1976 documentation. The circuit is powered by the voltage of the...
With the micro voltage regulator shown in the figure, we can design a power supply for small...
Kemet offers by Mouser Electronics engineering kits containing capacitors, super capacitors,...