MQ135 Sensor and Keypad-Based Air Quality Security System using Arduino_Prashant
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Components used: arduino, arduinouno, mq-135, keypad, buzzer, led, resistor
▶ Open & Simulate this CircuitSarkitLab
Components used: arduino, arduinouno, mq-135, keypad, buzzer, led, resistor
▶ Open & Simulate this Circuit