Hello,
Need a bit of input advice. I Am looking to connect a fuel meter to my Uno via an input cable. This is the manufacturer specs on the connector.
http://catalog.gpi.net/Asset/GPI-Industrial-Meter-Catalog-Version-7-Page-25.pdf
(Pulse access module, bottom item)
I am still quite new to the world of Arduino. Do you see any interface problems I might have with with this or have any insights about how I might go about doing it? Any help or advice you can give would be awesome.
The pulse access module has an open collector output. That means that when a pulse is active, the signal is pulled to ground.
When the pulse is not active, the signal needs to be pulled high with a resistor (for the Arduino to 5V). This is done with a pull-up resistor.
You could use the internal pull-up resistor of the Arduino, but it is better to have a resistor of 1k or 4k7 for that.
The Arduino should detect the pulses of 0 to 750Hz. There must be a library for that, but I don't know at the moment.
Thanks for the advice! I appreciate you taking the time to help me learn.
Hey, arduino novice here. I am trying to collect data from a fuel meter input and then display it on my computer and a LCD screen. I have the meter and circuit diagram information
Here:
Any help or advice would be greatly appreciated. Sorry to be such a noob.
You can use that with the open collector output, you have to add a pull-up resistor to 5V.
Or you can use the 6V square output with a voltage divider.
A Voltage divider is two resistors. One resistor from the 6V to analog input of Arduino, and one from analog input to GND.
If you use 10k to the 6V and 47k to GND, you can measure up to 6V and it will be divided for the Arduino to 0...5V.
Using more than 5V near the Arduino might damage it some day. Perhaps you could buy a new Arduino board in advance, in case it gets damaged. You can also add a protection resistors to Arduino input pins (analog or digital). Perhaps a resistor of 1k or 4k7.
This might be interesting, a library that can measure the frequency:
http://www.pjrc.com/teensy/td_libs_FreqCount.html
Hey guys. Thanks for the advice thus far. I have opted to try the open collector option. I have tried following the advice given but seem to be running into some trouble. Check out how I wired in the meter.
For some reason it only reads in the low state no matter how quickly it flows. There does not appear to be any change. Any help you can give would be great. Thanks again.
Here's a little more info on the meter I am working with if it helps.
http://catalog.gpi.net/item/g2-electronics/g2-meter-modules/conditioned-signal-output-module
kevin567890:
For some reason it only reads in the low state no matter how quickly it flows. There does not appear to be any change. Any help you can give would be great. Thanks again.
You have miswired the sensor. In that part of the breadboard, the connections are vertical (in the orientation you show).
See attached diagram for correction.
Some breaedboards have the horizontal rows at top and bottom, split into segments. The wide spaces between the groups may indicate separation of groups of connected holes.
Such a stupid mistake. Thanks for the help.
