This circuit uses an optical coupler called Raystor created by Raytheon in the 1960s. The circuit uses components from the era that can be changed. The current is low.
This 10 kHz filter was obtained from an article in Electronics Now magazine in February 1995. The...
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We found...
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...