Need help..the concept is of a laser alaram..the variable resistance is a CdS photoresistor..when laser light falls on it its a few kilo ohms resistance..when no laser light on cds it goes upto some mega ohms..when mega ohms the lamp and led start up..lamp is basically a buzzer..now when light falls on cds buzzer and led turn off..what can i do to make sure buzzer and led stay on when laser and cds connection is blocked once
