This circuit was found in the September 1993 Electronics Now magazine. It is based on the 555 and powers an audible indicator.
This VCO with a common operational amplifier was found in an old American documentation. The...
This circuit is from a Radio Electronics magazine from May 1989. The power supply must be...
August 2017 - Mouser Electronics is making STMicroelectronics' Analog and Digital MEMs available in a...