Member #367799

Member Since: October 8, 2012

Country: United States

  • Use the SF Gas Sensor Breakout Board. The MQ-6 label should be oriented as shown in the picture of the breakout board board (to the left when looking at the bottom of the breakout board). Connect (GND TO Ground), (A1 TO +5V), (H1 TO +5V; heater) and [B1 TO (10kohm load resistor to ground) AND B1 TO (Analog pin)]. In effect you measure the difference between A1 and B1.

  • Use the SF Gas Sensor Breakout Board. The MQ-6 label should be oriented as shown in the picture of the breakout board board (to the left when looking at the bottom of the breakout board). Connect (GND TO Ground), (A1 TO +5V), (H1 TO +5V; heater) and [B1 TO (10kohm load resistor to ground) AND B1 TO (Analog pin)]. In effect you measure the difference between A1 and B1.

  • From the datasheet, with a 10 ohm resistor, Current (A) = 4.9666 * (output mV) + 1.6956 (when RL = 10 ohms). The output in mV is the measured current. Put 10 ohm resistor across the A/C circuit as indicated on the datasheet. Measuring a 30 A load will yield a voltage of 151 mA. Clamp over the black wire of an A/C circuit < 30 A. Per Bruce Lowther, measure across the first and last contact of the 3.5mm plug.

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