In the figure we have a circuit of an analog computer published in the Radio Electronics magazine of June 1958. Accuracy depends on the components used, mainly the potentiometers.
This source allows the supply of laser diodes with voltages above 11 V. The circuit is from French...
This circuit uses an 18 MHz crystal to generate 36 MHz signals. We found it in an 80's...
This circuit monitors the current in the negative line. The circuit is from a 2005 Linear...