This circuit was found in the August 1997 Electronics Now magazine. The circuit uses well-known operational codes and generates signals up to 20 kHz.
This circuit, found in a publication from the 1970s, uses two PNP power transistors that can be...
This circuit can be used as a shield for touch control. The circuit can use any common FET like...
This high-impedance headphone circuit was found in a 1990s William Sheets. The power is low, but...