Circuit Schematic Simple Refrigerator Door Alarm using LDR and Transistor

Alarm. - This is electronic circuit schematic of Simple Refrigerator Door Alarm using LDR and Transistor like in Figure 1 below. In this circuit schematic the basic component used are LDR and transistor. 

In here we will give you global description about circuit schematic of Simple Refrigerator Door Alarm using LDR and Transistor and then we will give you link to continue your reading from original source as external website.

Circuit Schematic

Figure 1. Circuit Schematic Simple Refrigerator Door Alarm using LDR and Transistor (source: Eleccircuit)

Component Part

• LDR
• Resistors
• Variable Resistor
• Transistor
• Capacitor
• Battery

Description

Circuit schematic like in Figure 1 above is Circuit Schematic Simple Refrigerator Door Alarm using LDR and Transistor. Eleccircuit site describe that this is a Simple Refrigerator Door Alarm circuit, it will detect light of lamp in the fridge and alert with buzzer. This projects is small size, easy to make and cheapest.

It will alarm when Small child secretly eating candy or medicine stored in the refrigerator or sometimes forget to close the door is not closed. Which it Consumes electricity and the refrigerator’s lifespan shorter. Stored food may be spoiled, too. This problem, we try to create a Refrigerator Door detector alarm.

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