The circuit is from 80s Siliconix documentation. The integrated circuit is from the company and is not common today. It can be used operational equivalent more common in our times.
This two-station intercom was found in documentation from 1966. R4 should be experimentally...
This circuit serves to isolate analog signals, for example, audio signals in a secure link...
In this circuit the output voltage depends on the light that falls on the LDR, decreasing when the...