Methane Gas Sensor MQ4 (Analog/Digital) arduino module The micro- SD Card Module

The micro- SD Card Module is a simple solution for transferring data to and from a standard SD card

The encoder outputs gray code which you can interpret using a microcontroller or Arduino and find out which direction the shaft is turning and by how much

5 general purpose input can be connected to limit switch

The accuracy and detection distance can be adjusted using the onboard poteniometer

Serial port protection: RS-485/422 surge 10/700us

Methane Gas Sensor MQ4 (Analog/Digital) arduino module The micro- SD Card ModuleMQ 4 Sensor is highly sensitive to Methane CH4. Using a MQ sensor and detecting the gas is quite easy. You can either use the digital pin or the analog pin to accomplish this. Simply power the module with 5V and you should notice the power LED on the module to glow and when no gas is detected the output LED will remain turned off meaning the digital output pin will be 0V. Features Power requirements: VCC 5V0. 1. Detection Gas: Natural gas Methane.