This circuit is from an 80's Electronic Engineering. The base is a common operating and 4 single integrated voltage comparators. The circuit directly drives 4 indicator LEDs.
Rapid Prototyping Boards for 32-bit Applications Include Peripherals, Easy-to-use Interface and...
A stereo digital mixer using the 4053 is built as shown in figure bellow. The IC must be powered...
This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is...