Found in a 90s PE Hobbyst Handbook, this circuit mimics the sound of a space gun. The components are common, and changes can be made to modify the sounds.
This simple circuit for motors that depends on the MOSFET used was found in the January 1998...
This transistorized shield also functions as a logic gate. The power supply can be in the range of 4.5...
Found in a 90s Popular Electronics, this Hartley oscillator uses an output transformer of the type...