Found in Popular Electronics from the 90s, this circuit detects modulated infrared radiation and serves as a test for remote controls. Infrared sensors equivalent to the one indicated can be used.
This circuit was found in an American documentation from 1969. It serves to trigger circuits by...
This input stage has unit gain but a high input impedance and low output impedance. The circuit is...
The circuit presented was found in the Linear Applications Handbook of the National Semiconductor of 1994....