security circuit in bd

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Digital Touch Sensor Capacitive Touch Switch Module Arduino Original price was: 130.00৳ .Current price is: 110.00৳ .
L298N Motor Driver Module Original price was: 360.00৳ .Current price is: 230.00৳ .
2.2M ohm 1/4w Resistor- Pack of 10pcs Original price was: 6.00৳ .Current price is: 5.00৳ .
330 ohm 1/4w Resistor- Pack of 10pcs Original price was: 6.00৳ .Current price is: 5.00৳ .
Ceramic Capacitor 10pF - 10pcs Pack Original price was: 15.00৳ .Current price is: 10.00৳ .
Ceramic Capacitor 18pF - 10pcs Pack Original price was: 15.00৳ .Current price is: 10.00৳ .
Ceramic Capacitor 30pF - 10pcs Pack Original price was: 15.00৳ .Current price is: 10.00৳ .
MQ135 Gas Sensor Module Original price was: 195.00৳ .Current price is: 185.00৳ .
7 Segment 3 Digit (CC) Original price was: 40.00৳ .Current price is: 35.00৳ .
High Sensitivity Alarm Vibration Sensor Module Original price was: 140.00৳ .Current price is: 125.00৳ .

Object Detector Circuit For Project