This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used as a basis for modern designs with equivalent transistors.
The figure shows how to connect a relay to obtain the latch effect. The circuit is from an...
This circuit uses a thermistor or NTC as a temperature sensor and provides the indication on an...
This circuit automatically controls the degree of illumination. As the circuit is from 2001, it...