MQ7 Carbon Monoxide Sensor (20-2000ppm, Analog Output)
Analog CO sensor detecting 20–2000ppm with a simple resistive divider circuit. Requires 5V supply and ADC connection; needs a warm-up/burn-in period before accurate readings.
Pinout
- GNDType · Ground
- VCCType · Power
- SIGType · Signal
| Pin | Type |
|---|---|
| GND | Ground |
| VCC | Power |
| SIG | Signal |
Pin details
3 connections- GNDGround
- VCCPower
- SIGSignal
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
Module pins: VCC, GND, SIG. Schematik maps them to your board in the app.
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