This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not given and the transistors are of the time. The circuit provides a power of a few watts.
The voltage of 30 V indicated in this project, shown in the figure, depends on the diac used. It...
This circuit is from Motorola's Linear Interface ICs of 1993. The circuit can be implemented with...
This circuit can use a pendulum sensor. We found this configuration in a 1994 publication. The...