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.
We found this variable regulator circuit in a Radio Electronics issue from July 1984. It is one of...
Found in American documentation, this circuit aims to produce pulses of certain durations from smaller...
STMicroelectronics MP23AB02B MEMS Audio Sensor is a compact, low-power microphone built with a...