Hi
I would like to interface this a MPXM2202AS to my arduino
the spec sheet says it needs 10-16v supply and my board has a 12v supply so I assume I can use that.
it also says it needs 6maDC
the power supply I am using is a 1000madc.
I am very new to electronics and do not want to blow the little thing.
any ideas on what i should use to interface it with and pins to use, any code?
thank you for your help
Do you have a problem when you plug your 800mA mains TV into a 13 A mains socket?
thank you for your answer.
no I my tv doesn't. but I don't know what electronic wizardy is at work inside the idiot box.
But if i tried attaching my 240v tv to my 12 mobile phone I may get troubles with my phone 
after a bit more googleing i have found an answer of sorts.
I suspect my problem would come when i try to shove the 12v from the sensor into the arduno pins.
this is the schematic that I have found. would it work for me?
http://forum.arduino.cc/index.php?topic=21813.0
seems very similar to what im trying to achieve
Is it possible to buy a pressure sensor that will work with an Arduino ? For example a 5V pressure sensor with a 5V output range. The MPX5500 series or similar pressure sensor will work with an Arduino.
This sensor has a few millivolts output, you can not read that with an Arduino in a accurate way. If you still want to use it, start with the 5V pin from the Arduino as power.
Only similar. The transducer in the linked forum post is 4 to 20 milliamps. That can be converted to a voltage directly readable by the Arduino with a simple 250 ohm resistor.
But, the output from the transducer you specified is not 4-20 milliamps, it is zero to 40 millivolts. So, you'll need an amplifier with a gain of approximately 125 to shift the 40 mv to 5 volts which is what the Arduino expects.
This is not a simple task for a newbie so ultimately it would be far easier for you to purchase a transducer with an output type (milliamps or volts, not millivolts) that can be directly read by the Arduino.
ok, total disaster.
in that case can anyone suggest
1 an easy to find and buy pressure sensor in the uk
2 cheap sub £10
3 pressure range 0-2 bar
thank you for your help
p.s. does anyone want a cheap pressure sensor lol
The supply voltage is quoted on the datasheet as being 10V typical, 16V maximum.
It also states that the output is ratiometric to the supply voltage. This means that you can use it at a lower voltage, e.g 5V, but you just get a lower output.
This type of pressure sensor has two outputs, usually at around half the supply voltage, when you apply pressure the voltage on one outputs goes up in voltage, (by a few millivolts) and the other one goes down (by a similar amount).
The usual way to use one is with an instrumentation amplifier. This arrangement of 3 op amps removes the offset voltage and provides gain to increase the millivolts output up to volts.
You can make one from 3 out of the 4 amplifiers in a quad op amp package, such as the LM324 / LM2902, or there are dedicated instrumentation amplifier circuits such as the ones made by Burr Brown, (now Texas) such as the INA103.
This IC just needs a single external resistor to set the gain, or use the internal one to give a gain of 100.
malcomp:
p.s. does anyone want a cheap pressure sensor lol
You can try adding a cheap HX711 breakout board to your cheap sensor.
Leo..