This circuit was found in a 1968 documentation. The circuit generates three rectangular signals from a 400 Hz sinusoidal input. The circuit is suitable for applications in power controls.
The microwave sensor of this circuit is a common ceramic capacitor. The circuit is from an 80's...
This bargraph circuit is from an ancient American documentation. It indicates the charge state of...
This circuit is suitable for calibrating old oscilloscopes. It was found in a 1980s documentation. It...