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.
Found in an American publication in 1967, this circuit generates pulses for the triggering of a LASER of...
This circuit was found in a Motorola documentation from the 70s. The components are from the time,...
This amplifier with the AC187 and AC188 pair and the CA3130 integrated circuit was found in an...