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NXT gas leak
Posted: 09 Dec 2010, 11:53
by s0o0so
hi all
can anyone help me to make NXT interface for this gas leak sensor
http://www.active-robots.com/products/s ... s/MQ-6.pdf
with my thanx in advance
Re: NXT gas leak
Posted: 09 Dec 2010, 18:43
by mattallen37
I suggest following the example circuit. I would use a 7.2-9V power supply, and regulate it to the 5V required, using a 7805. Vout from the sensor needs to go to pin 1 of the NXT (analog in), and you need to make a common ground, so you should also connect pins 2 and or 3 of the NXT to the sensor ground.
Re: NXT gas leak
Posted: 11 Dec 2010, 04:28
by sparramc
I agree with Matt when it comes to Power Supply.
Head to
Futurlec as they have a number of different types of Gas, including Alcohol at very cheap prices. They also stock the other parts you are going to need.
You could use an
I2C A/D (
Analogue to Digital Converter) to end up with a more flexible Sensor. A
MAX127 or a
PCF8591 are a couple of common possibilities for I.C.'s to use. The
MAX127 has a better A/D bit rate of 12 compared with 8 for the
PCF8591: being their accuracy of conversion.