This didactic circuit from a 1977 Radio Shack documentation shows how to use the 741 as a comparator, detecting the input voltage through the R1 position. R1 may be a resistive sensor or the circuit may still be used as a voltage level detector.
This didactic circuit from a 1977 Radio Shack documentation shows how to use the 741 as a comparator, detecting the input voltage through the R1 position. R1 may be a resistive sensor or the circuit may still be used as a voltage level detector.
