This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and the SCR is a general purpose type The pitch frequency is given by R1 and C1 as formula next to the diagram.
This simple inverter was found in a 1997 documentation. Its purpose is to apply a high voltage to a...
For this circuit, the polarity of the power input does not matter, as the output terminals will...
In the figure we have the way to control an SCR with a programmable unijunction transistor (PUT)....