This circuit generates various types of sounds and can be used as a toy. The circuit is from Radio Electronics from January 1983. The amplifier can be replaced with a more modern type.
T We found this circuit in the 1960 Mullard transistor application manual. The circuit can be...
We found this circuit in a 1998 documentation. It tests common household appliances to see if they...
This configuration found in other companies' manuals is from Motorola's 1993 Linear Interface ICs....