8
Implementation:
This module should be powered up by connecting a 5V 1A DC power supply to
the J1 connector. This device has an onboard high power relay rated to 24VDC
2A; therefore, you can connect any peripheral device that you desire to the
output of the relay so it can be turned ON and OFF during the operation of the
sensor module.
The device is designed to work standalone where, when alcohol vapor or ethanol
is detected by the MQ3, the buzzer will be triggered to inform you that alcohol
has been detected. At the same time the relay will turn OFF. You may use the
potentiometer RW to adjust the sensitivity of the detector.
