This circuit was found in a 1964 Electronic Design. The circuit can be implemented with equivalent modern transistors. Note the high supply voltage.
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...