MICS6814 Multi-Gas Sensor Module — CO, NO2, NH3 Detection Mini The HC-05 is a Bluetooth

The HC-05 is a Bluetooth SPP (Serial Port Protocol) module supporting both Master and Slave configurations

General-purpose proximity switching

making it an ideal choice for applications such as home automation

8V – 24V) 2 GND Ground 3 OUT Open-Collector Output (Active Low) Key Features

it is straightforward to drive directly from a microcontroller PWM output or via a dedicated LED driver

MICS6814 Multi-Gas Sensor Module — CO, NO2, NH3 Detection Mini The HC-05 is a BluetoothMICS6814 Multi Gas Sensor Module CO, NO2, NH3 Detection The MICS6814 is a compact multi gas sensor from SGX Sensortech that simultaneously detects three different gases: Carbon Monoxide (CO), Nitrogen Dioxide (NO2), and Ammonia (NH3). It contains three independent sensing elements on a single chip, each with its own analog output making it ideal for comprehensive air quality monitoring, industrial safety, and smart city applications with Arduino or