This simple photometer uses a 0-200 µA galvanometer as indicator. The sensor is a common LDR and the adjustment of the scale is made by P1. In the dark the current drain is very low, by an on-ff can be added to extend the cell life.
This simple photometer uses a 0-200 µA galvanometer as indicator. The sensor is a common LDR and the adjustment of the scale is made by P1. In the dark the current drain is very low, by an on-ff can be added to extend the cell life.
