This circuit can use almost any operating system and has a high input impedance. The power supply must be symmetrical. The circuit was obtained in documentation from the 1980s.
This sensor works as an electronic push button, activating a power relay. The circuit must be...
This circuit is based on an old operational amplifier, having been found in documentation from the...
Found in a Maxim documentation, this 1980s circuit drives 4 LEDs on a bar scale. The circuit does...