Hi guys,
Im still an Arduino newbie and just need some simple confirmation with wiring up a few sensors to my arduino mega. As there are 16 analog inputs, does that mean I can receive feedback from 16 different gas sensors, (MQ series) from the link below?
The arduino mega
http://arduino.cc/en/Main/arduinoBoardMega
Gas Sensors
http://www.china-total.com/Product/meter/gas-sensor/Gas-sensor.htm
Thanks
Mus
Yes, I think you can connect them, just make sure they don't take too much Amperes
Yes you can add 16 MQ sensors in your Mega but it make much of your clock cycles for running other operations.. it uses SAR ADCs so 16*10 =160 clock pulses for reading all the inputs.
Avoid power those sensors from Arduino. Their heaters takes POWER
Actually you can have more than 16 you could either use an analog multiplexer or you can get an external ADC. I found this with just one minute on google. http://cds.linear.com/docs/en/datasheet/1391fas.pdf What it does is it takes 8 inputs and has 1 output so what you can select which input gets sent to the output. This is called a multiplexer.