Pololu Carrier for MQ Gas Sensors (Bare PCB Only)

This carrier board is designed to work with any of the MQ-series petrol sensors , simplifying the interface from 6 to 3 pins—ground, power and analogue voltage output—that are broken out with a 0.1" spacing, making the board compatible with 0.1" headers and standard breadboards and perfboards.

AUD$ 1.75

In stock in Australia  

We can ship 217 more in 7-10 days

Our Code: SKU-002621

Supplier Link: [Pololu MPN:1479]


Description

Pololu MQ gas sensor carrier dimensioned with quarter for size reference

Overview

This breakout board is designed to work with any of the MQ-series petrol sensors, simplifying the interface from 6 to 3 pins—ground, +5V VCC, and an analogue voltage output—that are broken out with a 0.1" spacing, making the board compatible with 0.1" headers and standard breadboards and perfboards. This board has two mounting holes and provides convenient pads for mounting the petrol sensor’s required sensitivity-setting resistor (referred to as RL in the sensor datasheet). All of the board’s traces are on the same side of the PCB, making it easy to see how the pads are connected.

The two mounting holes are intended to be used with #2 screws (not included).

Note that we also offer an alternate petrol sensor breakout board that is more compact, with a diameter equal to that of the smaller petrol sensor and the broken-out pins beneath the sensor.

Pololu MQ gas sensor carrier, bottom view

Connections

Connect VCC to 5 V, GND to ground, and OUT to an analogue-to-digital converter (ADC). The board has two pairs of through-hole pins for the required (but not included) sensitivity-selecting resistor RL, providing two mounting options—horizontal or vertical—between GND and OUT as shown in the pictures below. The resistance of RL should be calculated using the datasheet for your particular petrol sensor.

The MQ petrol sensors have light to no polarity, so the petrol sensor will work with the board all four ways it fits into the 6 pins (there are two possible orientations on each side of the board).

Pololu MQ gas sensor carrier with sensitivity-setting resistor soldered in the horizontal orientation

Pololu MQ gas sensor carrier with sensitivity-setting resistor soldered in the vertical orientation

The picture to the right above shows a board with a 3×1 0.1" right-angle male header soldered to it, which allows a standard servo cable to be used to connect the board to your project.

Note: This product consists of the PCB by itself; it does not include a petrol sensor, sensitivity resistor, header pins, or any additional hardware.


Specifications

Dimensions

Size: 0.7 x 0.95"

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