03-07-2013, 03:06 PM
light dependent resistors
light dependent.docx (Size: 17.13 KB / Downloads: 28)
INTRODUCTION
The circuit basically works on the photo sensitive transistor which is the most sensitive phototransistor Unlike the conventional alarms which requires a constant aligned light beam source to sound up that uses light dependent resistors (LDRs) based on the opto -interruption technique.This circuit works even in a dim lighting in the room or where ever the alarm is placed. The circuit is so deigned that it can be used by the shopkeepers at night to avoid cases of thefts
light dependent.docx (Size: 17.13 KB / Downloads: 28)
INTRODUCTION
The circuit basically works on the photo sensitive transistor which is the most sensitive phototransistor Unlike the conventional alarms which requires a constant aligned light beam source to sound up that uses light dependent resistors (LDRs) based on the opto -interruption technique.This circuit works even in a dim lighting in the room or where ever the alarm is placed. The circuit is so deigned that it can be used by the shopkeepers at night to avoid cases of thefts