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.
This simple timer for incandescent lamps or other non-electronic charges uses a triac as a control...
This keypad telephone encoder circuit was found in ancient American documentation. The components used...
This interesting transistor configuration, which can be seen elsewhere on this website and in this...