Sensitive for Carbon Monoxide
The heater uses an alternating voltage of 5V and 1.4V.
A library for the MQ-7 : http://thesis.jmsaavedra.com/prototypes/software/mq-7-breakout-arduino-library/
The MQ307A (also on this page) is like this sensor, but uses a lower heater voltage.
Search for datasheet: http://duckduckgo.com/?q=%22mq-7%22+gas+sensor+filetype%3Apdf
VCC - 5v
GND - Ground
DO - Digital Output = HIGH /LOW (Sensitive can be adjustable by potentiometer)
AO - Analog Output = 0-1023 value (Arduino)
#MQ7 #Sensor #Module
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