This circuit is from a 60's documentation. The circuit uses components from the era and serves to monitor a 150V continuous power line.
This RS flip-flop uses two type 4N26 optical couplers and is characterized by the very high...
This circuit produces a sine 1 kHz signal. The frequency is given by C1, C2 and C3. This is a...
This circuit is a documentation of the 70's and therefore valid for analog lines. What the circuit...