With this circuit you can produce the sound effect passing from one channel to another. The circuit is from Mullard documentation from the 1960s. The transistors may be the BC548.
This 80's circuit can be implemented with modern equivalent FETs with lower on resistance. The...
This simple neon alternating flashing circuit was found in an old American publication. The...
The great advantage of the circuit shown in the figure is the fact that its frequency is...