{"title":"MQ-2 smoke sensor module","handle":"mq-2-smoke-sensor-module","url":"/products/mq-2-smoke-sensor-module","description":"\n     This is the MQ-2 smoke sensor module. It is sensitive to flammable gases such as LPG, propane, and methane.\nFind our tutorial here\nIt has four pins:AO: Analog OutputDO: Digital OutputGND: In electronics, we define a point in a circuit to be a kind of zero volts or 0V reference point, on which to base all other voltage measurements. This point is called  ground or GND.3.3V  : While 'VCC' stands for Voltage Common Collector, we'll connect the VCC pin to 3.3V on the micro:bitVoltage is the difference in potential between two points. As it is difficult to talk about voltage without a reference point, we need another point to compare it to. \n\n","vendor":"Little Bird","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4258,"title":"Default Title","sku":"LB-24-MQ2","price":10.28,"on_sale":false,"in_stock":true,"available_quantity":7,"option1":"Default Title"}]}