This circuit was obtained in a Electronics World of 1968. The transistors can be equivalent as the BC558 for the PNP and the BD135 for the NPN powering lamps from 3 to 12 V according to the supply.
The circuit shown in the figure generates a rectangular signal whose frequency depends on C1. For...
We found this circuit in a Popular Electronics from the 90s. It operates at a frequency of 15 kHz....
We found this circuit in 2005 Linear Technology documentation. MPOSFET is load-matched. The...