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MQ2 GAS SMOKE SENSOR
MQ-2 Gas & Smoke Sensor Module for detecting LPG, methane, propane, hydrogen, and smoke. Provides analog and digital outputs for microcontroller projects.
The MQ-2 Gas & Smoke Sensor Module is a highly sensitive sensor designed for detecting combustible gases and smoke. It can sense LPG, propane, methane, hydrogen, alcohol, and smoke in the air, making it ideal for gas leakage detection, fire alarms, and safety monitoring systems.
The module provides both analog and digital outputs, allowing easy interfacing with microcontrollers such as Arduino, PIC, AVR, ARM, and ESP32. Featuring high sensitivity, fast response, and stable performance, the MQ-2 module is widely used in home automation, industrial safety systems, and educational electronics projects.

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Text to Speech TTL Module (Serial to Speech)
-  Single row 0.1″ header for easy connection to a host system
- Power requirements: +5 VDC
- 30 mA idle
- 46-220 mA active (depending on speech parameters and output load)
- Â Communication: Asynchronous 9600 bps serial (8N1)
- Dimensions: 1.25″x1.5″x0.37″
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Text support rate is better
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 Interface operation is simpler
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5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
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 Voice effect optimization
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 Module miniaturization and easy integration
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Dimension: 33*27.5mm
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With mounting holes

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