Hi, I've made a Breathalyzer with MQ-3 and Arduino and wrote a full DIY tutorial
if you guys wanna take a look:
TUTORIAL HERE:
Building a Breathalyzer with MQ-3 and Arduino - Daniel Andrade
Hi, I've made a Breathalyzer with MQ-3 and Arduino and wrote a full DIY tutorial
if you guys wanna take a look:
TUTORIAL HERE:
Building a Breathalyzer with MQ-3 and Arduino - Daniel Andrade
Nice! It would be really cool if you could get it to give you accurate readings in numbered digits! We should work this circuit into the Openbar project!
hi
I am thinking of building something similar. Did you feel that the range of the MQ3 was enough? I am looking at the TGS 2620 which is far more sensitive and three times more expensive. Or is that overkill for alcohol testing?
thanks
fubbi
Hi guys,
I bought the MQ-3 sensor. It's easy to read the value of the sensor with an analog pin.
BUT i have a big problem : i need to calibrate the detector for 0,4mg/L (approximately 200ppm) of Alcohol concentration in air..
How get exactly 0,4 mg/L of Alcohol concentration in air ? :-/
various cryptic charts, should tell you how many beers to drink to get enlighted
fubbi