2. Soldering the headers Before using your click board, make sure to solder 1x8 male headers to both left and right side of the board. Two 1x8 male headers are included with the board in the package. 1 Methane click 4. Essential features 2 3 Methane click can detect methane levels in concentrations from 200 to 10000ppm. The 1. Introduction MQ-4 methane sensor has a sensor layer made of Tin dioxide (SnO ), an inorganic 2 compound which has lower conductivity in clean air. The conductivity increases as the levels of methane rise. Methane click also contains a potentiometer that lets you Turn the board upside down so that Turn the board upward again. Make sure adjust the sensor for the environment youll the bottom side is facing you upwards. to align the headers so that they are be using it in. For precise calibration the Place shorter pins of the header into the perpendicular to the board, then solder sensor needs to preheat (once powered up, appropriate soldering pads. the pins carefully. it takes 24h to reach the right temperature.) Methane click is a simple solution for 3. Plugging the board in adding a high sensitivity methane (CH ) 4 click sensor to your design. Its suitable for Once you have soldered the headers your designing gas leakage equipment. The board is ready to be placed into the desired BOARD board features an MQ-4 sensor, a calibration mikroBUS socket. Make sure to align the www.mikroe.com potentiometer, a mikroBUS host socket, cut in the lower-right part of the board with two jumpers and a power indicator LED. the markings on the silkscreen at the Methane click Manual Methane click communicates with the mikroBUS socket. If all the pins are ver. 1.00 target board through mikroBUS AN (OUT) aligned correctly, push the board all line. Methane click is designed to use a the way into the socket. 0 100000 026601 5V power supply only. 6. Calibration potentiometer 5. Methane click board schematic To calibrate Methane click for optimum performance, use the on-board potentiom- eter to adjust the load resistance of the sensor circuit. VCC VCC VCC 7. Code examples R1 Analog output A B AN PWM 2K2 Once you have done all the necessary prep- H H RST INT CS TX arations, its time to get your click board up A B SCK RX and running. We have provided examples SCL MISO for mikroC , mikroBasic and mikroPascal MOSI SDA R2 +3.3V +5V MQ-4 compilers on our Libstock website. Just PWR 470 GND GND download them and you are ready to start. MIKROBUS DEVICE CONN. P1 10K .com 8. Support MikroElektronika oers ff free tech support (www.mikroe.com/support) until the end of the products lifetime, so if something goes wrong, were ready and willing to help MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that may appear in the present document. Specification and information contained in the present schematic are subject to change at any time without notice. Copyright 2014 MikroElektronika. All rights reserved.