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It pairs well with Arduino
digital output Gas Analog CH4 Gas Sensor MQ4 For Arduino gas sensor with analog output adjustable sensing range
and impact with a weatherproof seal and clear top panel for viewing status LEDs and displays without opening the box
Input voltage: 0
and the physical size and pinout of connectors
Electret Microphone 20Hz-20kHz Omnidirectional - 3pcs Pack audio shield It pairs well with ArduinoElectret Microphone Capsule Omnidirectional, 20Hz20KHz (3PCS) The Electret Microphone 20Hz20KHz Omnidirectional (3PCS) are small, inexpensive mic capsules that pick up sound from all directions. They're the same type of microphone found in phones and headsets great for voice input, sound detection, clap switches, and ambient noise monitoring with an Arduino or ESP32. Note: These are raw capsules. You'll need a bias resistor and coupling capacitor, or
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