The circuit is from the MC1539 manual, an operational one close to the 741. The transistor admits equivalent and must be mounted in a good heat sink.
This capacitive-coupled stage can be implemented with any general-purpose transistor. The circuit can...
This latching light alarm was found in the 1995 Encyclopedia of Electronic Circuits Volume 5. The...
Found in a Popular Electronics from the 80's, this circuit simulates the equivalent card game. The...