This circuit was obtained from a 1970s RCA. The circuit uses LDRs as sensors. The resistors depend on the A / D converter used. The circuit can be used as a shield.
This field effect transistor amplifier circuit in common gate or common port configuration is from an old...
This circuit was obtained in an old American documentation. The integrated circuit used is...
This zero crossing detector is of the 1993 Motorola Linear Interface ICs. The source is...