Seeed Grove User Manual
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Summary of Contents for Seeed Grove
- Page 1 Grove - Alcohol Sensor User Manual Release date： 2015/9/22 Version： Wiki: http://garden.seeedstudio.com/index.php?title=Twig_-_Alcohol_Sensor Bazaar: http://www.seeedstudio.com/depot/Grove-Alcohol-Sensor-p- 764.html?cPath=25_127...
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Page 2: Document Revision History
Document Revision History Revision Date Author Description Sep 22, 2015 Loovee Create file... -
Page 3: Table Of Contents
Contents Document Revision History · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 2 1. - Page 4 Under the supervision of Seeed Technology Inc., this manual has been compiled and published which covered the latest product description and specification. The content of this manual is subject to change without notice.
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Page 5: Introduction
1. Introduction Grove - Alcohol Sensor is a complete alcohol sensor module for Arduino or Seeeduino. It is built MQ303A with semiconductor alcohol sensor. It has good sensitivity and fast response to alcohol. It is suitable for making Breathalyzer. This Grove implements all the necessary circuitry for MQ303A like power conditioning and heater power supply. -
Page 6: Features
2. Features Input Voltage: 5V Working Current: 120mA Detectable Concentration: 20-1000ppm Grove Compatible connector Highly sensitive to alcohol. Fast response and resumes quickly after alcohol exposure. Long life. Compact form factor. -
Page 7: Usage
Download Code and Upload There're two steps you need to do before getting the concentration of gas. First, connect the module with Grove Shield using A0 like the picture above. And put the sensor in a clear air and use the program below. - Page 8 pinMode(heaterSelPin,OUTPUT); // set the heaterSelPin as digital output. digitalWrite(heaterSelPin,LOW); // Start to heat the sensor void loop() { float sensor_volt; float RS_air; // Get the value of RS via in a clear air float sensorValue; /*--- Get a average data by testing 100 times ---*/ for(int x = 0 ;...
- Page 9 int sensorValue = analogRead(A0); sensor_volt=(float)sensorValue/1024*5.0; RS_gas = sensor_volt/5.0-sensor_volt; // omit *R16 /*-Replace the name "R0" with the value of R0 in the demo of First Test -*/ ratio = RS_gas/RS_air; // ratio = RS/R0 /*-----------------------------------------------------------------------*/ Serial.print("sensor_volt = "); Serial.println(sensor_volt); Serial.print("RS_ratio = "); Serial.println(RS_gas);...
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Page 10: Notification
According to the figure, we can see that the minimum concentration we can test is 20ppm and the maximum is 10000ppm, in an other word, we can get a concentration of gas between 0.002% and 1%. However, we can't provide a formula because the relation between ratio and concentration is nonlinear. -
Page 11: Resources
Resources Grove-Alcohol Sensor Eagle File Grove-Alcohol Sensor v1.2 Eagle File Schematics in PDF Format How to Choose A Gas Sensor MQ303A.pdf ... - Page 12 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Seeed Studio 101020044...
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