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Thread: Virtual Instrumentation

  1. #1
    Newbie
    Join Date
    May 2001
    Location
    Oregon
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    40

    Virtual Instrumentation

    I came across a cool application, if you know how to program PIC microcontrollers. Check out Easy Control. I tried it out and made some cool digital dash. It works great. The programming language for easy control is very easy. Support from the software owner is great. I made rpm, temp, speed, and volt gauges in about 30 minutes. The hard part is programming the PIC. I'm new to microcontroller and programming in general, but it was easier than I thought. The possiblities are limitless on what you can do it this. May be some one in the forum is will to work on something together. We can create some generic sensors and gauges for everyone. It should be pretty cheap to make (less than $20). Anyone interested?
    .
    66 Mustang

  2. #2
    FLAC
    Join Date
    Aug 1999
    Location
    Washington D.C.
    Posts
    1,542
    How does it get the data that it displays? Vehicle bus? OBD-II port?

  3. #3
    Newbie
    Join Date
    May 2001
    Location
    Oregon
    Posts
    40
    I was thinking of something simple like using the ADC on the PIC to get data from any analog sensors. I can transmit all the data to the serial port. I'm using the 16F871 chip which has 8 channels of ADC. Of course, voltage and temperature are pretty simple. I'm working on the speed gauge. I was thinking of using the GPS reciever I have to get the information. The Easy Control software allows passing of information between multiple serial ports. I just have parse the data coming in from the serial port and assign it each modules (voltage, temp, speed, etc..). Like I mentioned before, I just started programming, so I would need some help. I think it's possible. Any suggestion?
    66 Mustang

  4. #4
    FLAC
    Join Date
    Aug 1999
    Location
    Washington D.C.
    Posts
    1,542
    I still donít have a clear understanding of what your big picture. From which analog sensors? Are you trying to use existing sensors or put in new ones?

    I assume you want to display this on a PC?

    I seems to me like it would be far easier to simply query the OBD-II (if your car is equipped) return all the parameters and display that data anyway you see fit. It seems redundant to use a PIC to gather this data from analogue sensors when your car probably all does it anyway.

    Iíll working on a similar project for my car using the OBD-II port.

  5. #5
    Newbie
    Join Date
    May 2001
    Location
    Oregon
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    I'm sorry I forgot to mention that I'm doing it for an very older mustang. I might have to use existing sensors on the car or add in sensors to get the data. Yes, I want to display all the information on a PC. I just got the voltage meter to work, it was easier than I thought. I'll post some pictures of the gauges when I get home.
    66 Mustang

  6. #6
    Variable Bitrate
    Join Date
    Aug 2002
    Location
    longview washington
    Posts
    425
    for vehicle speed alot of cars use whats called a vss basicaly a slotted wheel with a photo diode almost the same waya mouse works it counts the pulses from the slotted wheel and send that to the ecu to help figure out how to run the car
    now your wanting to do it stand alone and not with the cars ecu ok
    simple well i guess it is

    80ish ford trucks and i am sure a few other cars for that matter use a vss sensor that goes inline with the spedo cable and has i think 3 wires or 2 not sure but you can use one of those for your speed input and just figure out how to get the pic to count the pulses and figure out the speed

    other cars like my s-10 by the way have the vss unit built into the dash board so that would not really work for your setup

    i know its kinda a vauge idea i just gave but it might help
    WINNER!!!!
    run-on sentance comp 2002!!
    :)

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