This circuit uses a 555 (according to the diagram) to generate 50 ms tone bursts at a frequency of 1.5 kHz. The circuit is from an 80's Electronic Design.
The figure shows the basic circuit of a relaxation oscillator with operational amplifier. The...
This circuit was obtained from American documentation from 1966. It triggers when the two input...
Found in an American 1980s documentation, this circuit generates high-intensity pulses for a...