This circuit, which appears in other versions on this website, was obtained in old documentation. The load of each PUT depends on its characteristics. The circuit is low frequency.
The two adding and differentiating circuits with operational amplifiers given below were obtained from...
This level matrix display was found in a 1994 documentation, but it can still be assembled, as the...
This circuit dates to 1999, when most vehicles did not yet have electronic ignition and used...