This circuit simulates the effect of an inductance. Equivalent operational amplifiers can be used, and the power supply must be symmetrical. The circuit is from a 90's Poptronics.
This circuit was found in a 1991 PE Hobbyst Handbook. The components are still common and each...
This circuit was found in an internet documentation. The relay must have voltage according to the...
In the figure we have the way to add hysteresis to an operational amplifier. The relationship...