Light/Dark Switch With Relay
The circuit as shown act as a light detector. Under normal conditions the resistance of the LDR is high, keeping pin 2 low. When light falls...
Beranda » Arsip untuk May 2011
Refrigerator Door Alarm Circuit Using LDR
The alarm circuit enclosed into a small box is placed in the refrigerator near the lamp. With the door closed the interior of the refrigerat...
