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.
May 2016 - Mouser Electronics is sourcing the new high-performance audio amplifiers with bipolar...
Using this circuit a low current switch can be used in the control of heavy duty loads, powered...
This timer with 1 second accuracy was obtained in a 1973 documentation. The Buzzer is a low-power type...