We found this circuit in an Electronic Design. The main integrated circuit is the 4017. The frequencies are determined by the RC circuits as well as the duration of the generated pulse train.
Found in a 90s PE Hobbyst Handbook, this circuit mimics the sound of a space gun. The components...
This circuit, found in a publication of the year 1968, uses a MOSFET at the input to increase...
This circuit was found in a 1964 Electronic Design. The components are of the time, and modern...