We found this 12 V ignition circuit in the 1964 RCA transistor manual. The 2N3054 can be replaced by the TIP41C. The two transistors must be provided with heat sinks.
This well-designed sinusoidal oscillator by Wien bridge was found in ancient European...
This is a circuit for testing small lamps and LEDs. The lamps that can be tested are the ones...
Found in a Popular Electronics from the 90's, this circuit can be implemented with almost any...