150 PSI Air Pressure Sensor

**Ryann** · 12-07-2007, 06:18 PM

got 4 of the senders, they only have one thread to hook onto, not two like in the pics, so im guessing no need to earth?

**h3rk** · 12-07-2007, 08:49 PM

any plans for a low range (in. H2O) pressure sensor, or differential pressure sensor?

Allsensors: Miniature Low Pressure Sensors
Low Pressure (1 inch H2O to 30 inch H2O) Sensors

**greenman100** · 12-08-2007, 10:30 PM

Originally Posted by Ryann

got 4 of the senders, they only have one thread to hook onto, not two like in the pics, so im guessing no need to earth?

you need to ground it. attach a wire from the threaded air nozzle to ground on the sensor cable

**h3rk** · 12-08-2007, 10:48 PM

I should have read better and saw that you were implementing the use of one of DakotaDigital's products. I might try to build this myself, but it would be my first, and with pressures this low, I'm not sure I'll seal it right (just one of the many things I'm not sure of). I suppose I'll forward the question to them.

in other words: nevermind

**Ryann** · 12-12-2007, 03:11 AM

hello,, 2k were on the fusion am i connecting too? im confused on which are which and were im putting the active.. thanks.. im in the process now of hooking one up

Ok well when i connect it into my fusion.. into the 3 pronged inputs, red on very outside, black in middle.. im getting results in my skin, the stock skin, although they all read different?

also if i plug it into either of them they all read? and some of them different? what code can i put into my skin and what ports? to get a solid reading on what im getting.. theres no documentation on this board to help me out.. so theres gunna be a bunch of lame posts from here on in lol..

i was under the impression that it would only read from what port i indicated in the skin?

i also thought it was an analogue input? altho i read nothing from the 4 ports on there.. lil tutorial? lol sorry 2k

Perhaps a way how to in the uber software? seeing as though im gunna need to learn that stuff sooner rather then later?

**greenman100** · 12-12-2007, 04:32 AM

Originally Posted by greenman100

so, you just need a 180 ohm resistor. Wire it like this:

+5v
|
sensor
|
analog input
|
resistor
|
Ground

Where ground is the middle pin, analog input is towards teh edge of teh board, and +5v is towards teh middle of the board

**Ryann** · 12-12-2007, 04:56 AM

do i need the +5v towards the middle of the board? the 3rd pin.??

2k's description is wired different to that.. ill go off this one .. thanks

also, the resisters i have are 5w 100ohm.
is this fine?

**Ryann** · 12-12-2007, 06:28 AM

well thats how i have it that the moment..

I noticed evry port around it is picking up signal aswell, and im sure this was a bug that could be fixed? its also picking up signal when there is zero presuure on the sender.

my highest signal im getting is like 1.9 and it lowers from there, it fluctuates alot but not really too far.. im not sure if i have any of it right, so yea, let me know thanks..

**Ryann** · 12-12-2007, 06:52 AM

one more thing. What should i be setting the type to in the software?

**2k1Toaster** · 12-12-2007, 07:20 AM

Originally Posted by Ryann

do i need the +5v towards the middle of the board? the 3rd pin.??

Nope.

Originally Posted by Ryann

2k's description is wired different to that.. ill go off this one .. thanks

Where? I do make mistakes often, so let me know where and I will try to fix it. But the outermost pin is analogue. The middle pin is ground. The innermost pin is +5v constant.

Originally Posted by Ryann

also, the resisters i have are 5w 100ohm.
is this fine?

The resistance and tolerance are the only things that matter. Of course dont send more than 5W down it! Common are those little 1/4W ones. And what is the tolerance? Usually it is 5%. But since the error never changes, and you will be calibrating it with the constant error, it doesnt matter. But if you had 2 of them, they could vary as much as the tolerance %.

Originally Posted by Ryann

well thats how i have it that the moment..

I noticed evry port around it is picking up signal aswell, and im sure this was a bug that could be fixed? its also picking up signal when there is zero presuure on the sender.

my highest signal im getting is like 1.9 and it lowers from there, it fluctuates alot but not really too far.. im not sure if i have any of it right, so yea, let me know thanks..

That is correct. And all the other ports will pick up a bit of a signal because of the way the ADC works. But if there is another signal on the line, it should be fine. Just when it is floating (not connected to anything) it will pick up the left over charge in the cap. Since you will only be monitoring ports that have things connected, it is no problem.

Will this sensor be put in something that you expect to change fast, or slowly? What are you monitoring? (I havent read the whole thread)

) If it something that changes relatively slowly, then you can turn on the auto-averager (which is what most software does anyways without letting you control it, unlike mine

) so those little changes dont show up as much, but are still logged if needed.

Originally Posted by Ryann

one more thing. What should i be setting the type to in the software?

I would say don't. Right now set it to VOLTAGE to get the readings. But then switch to the Uber Edition, because it will make it easier.

But if you want to use the V2, then set it to CUSTOM and then in the #SETTINGS# filed, is where your equation goes.