Found in an American documentation from the 90s, this circuit uses small low voltage lamps (6 to 12 V0. The circuit can be adapted to use LED indicators.
Any operational amplifier can be used in this circuit. The 741 is the most common. Power supply must...
This circuit was found in an ancient American documentation. With it is possible to double the...
The circuits shown in figure 2 are suggested by Texas Instruments (www.ti.com) make use of the...