Found in a 90s Electronic Engineering, this circuit generates sinusoidal signals that depend on the capacitors. The potentiometer adjusts the generated signal symmetry.
This circuit simulates an inductor. Or operational amplifier of old type, but a configuration is...
We found this circuit in a 1967 Electronic Design. The circuit uses contemporary transistors that...
To control relays safely with double insulation, we suggest the circuit in the figure. The optical...