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 LPG click 4. Essential features 2 3 LPG click can detect liquefied petroleum gas levels in concentrations from 200 to 1. Introduction 10000 ppm. The MQ-5 LPG sensor unit has a sensor layer made of Tin dioxide (SnO ), 2 an inorganic compound which has lower conductivity in clean air. The conductivity increases as the levels of LPG rise. LPG 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. For the bottom side is facing you upwards. to align the headers so that they are precise calibration the sensor needs to Place shorter pins of the header into the perpendicular to the board, then solder the preheat (once powered up, it takes 24h to appropriate soldering pads. pins carefully. reach the right temperature). LPG click is a simple solution for adding 3. Plugging the board in a high-sensitivity sensor for detecting click liquefied petroleum gas leakage. The Once you have soldered the headers your board features an MQ-5 sensor with board is ready to be placed into the desired BOARD a SnO gas sensing layer, a calibration mikroBUS socket. Make sure to align the 2 www.mikroe.com potentiometer, a mikroBUS host socket, cut in the lower-right part of the board two jumpers and a power indicator LED. with the markings on the silkscreen at the LPG click Manual LPG click communicates with the target mikroBUS socket. If all the pins are aligned ver. 1.00 board through mikroBUS AN (OUT) line. correctly, push the board all the way LPG click is designed to use a 5V power into the socket. 0 100000 026564 supply only. 6. Calibration potentiometer 5. LPG click board schematic To calibrate LPG click for optimum perfor- mance, use the on-board potentiometer to ad- just the Load Resistance of the sensor circuit. VCC VCC VCC 7. Code examples R1 Analog output A B 2K2 Once you have done all the necessary AN PWM H H RST INT preparations, its time to get your click board CS TX up and running. We have provided examples A B SCK RX for mikroC , mikroBasic and mikroPascal SCL MISO PWR compilers on our Libstock website. Just SDA MOSI R2 +3.3V +5V download them and you are ready to start. 4K7 MQ-5 B GND GND 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.