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#291697 - 30/09/02 12:24 AM
Re: Inclinometer
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Member
Registered: 06/09/00
Posts: 1038
Loc: West Los Angeles, CA
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Originally posted by Xterrian: I love Macgyvering crap like this. Originally posted by Xterrian: Is anyone interested in this or should I delete this thread? Don't delete this thread... I like Macgyvered stuff.
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#291699 - 30/09/02 08:34 AM
Re: Inclinometer
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Member
Registered: 17/08/00
Posts: 13694
Loc: Baltimore, MD
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Xterrian, I've got an old mechanical clinometer/altimeter pod from an older 4Runner that you might be able to hook up some electronical doo-dads to to take a reading from somehow. Hell, you can even see the internals of it here: http://4crawler.cruiserpages.com/4x4/CheapTricks/index.shtml Click on the Clinometer Tweaks link. You want it, I'll send it to ya, no charge. Brent
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#291701 - 30/09/02 09:36 AM
Re: Inclinometer
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Member
Registered: 06/02/02
Posts: 54
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Xterrian, Take a look at this it is a four channel A-D converter. Should do everything that you want. Now with this it connects to Dallas Semiconductors propritary 1-Wire bus but from there you can go to serial or printer port. -Mike
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#291704 - 02/10/02 08:59 AM
Re: Inclinometer
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Member
Registered: 01/08/01
Posts: 319
Loc: Quebec, QC, Canada
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If I understand correctly the principle of the sensor you want to use, it's a glass ampule filled with a conductive solution. There are 4 wires around and one in the center, the more a wire is immerged in the solution, the more current (or voltage) it conduce.
I this correct ? If yes, I can help you with the circuit. Again, if I understand well, you want to do two separate circuit (one for the left-right, the other for front-rear).
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#291706 - 02/10/02 10:26 AM
Re: Inclinometer
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Member
Registered: 08/12/00
Posts: 2014
Loc: Fort Lewis, WA
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Thanks to 20-100 and Electroken for responding. I left out the DC killing the sensor part in my posts just to make sure that the person responding knew what the hell they were talking about. I looked into the ADXL202E, but it seemed to me that it was actually an accelerometer and could have problems centering properly if started while on an incline. I may be wrong, but I couldn't get anybody where they were sold to state emphaticaly that this wouldn't be a problem. I'll be happy with a +-2 degree solution, so it doesn't seem like that hard of a sensor to get usable results for me. If it's too complicated to do it myself, I can always purchase their solution for $100. I was trying to keep the project under $100 total. I'll still have to build a serial adapter and buy a serial to usb adapter as well. I'm easily looking at $150 if I go with their solution. There is a downloadable data sheet at the Fredericks Sensors site I posted above, with test circuits and some information that may be helpful in building a reasonable circuit. Electroken, you are the shiznit when it comes to electrical questions here, so if you say scrap it and go with the ADXL202E, I probably will. Let me know what you think. I am probably getting too high tech anyway. What do you think about the gutless servo with just the pot and gears to damp movement?
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#291708 - 02/10/02 01:00 PM
Re: Inclinometer
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Member
Registered: 01/08/01
Posts: 319
Loc: Quebec, QC, Canada
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I bow before you ElectroKen.
And maybe you can answer me: The circuit I was thinking about was derived from a Wheatstone bridge to detect very small changes on resistances between the side pins and the center pins. Did running a very small DC current (in the range of 10 micro amps) can ruin such a sensor ?
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#291711 - 02/10/02 02:50 PM
Re: Inclinometer
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Member
Registered: 16/08/02
Posts: 20
Loc: West Virginia
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Xterrian,
The ADXL202E that Ken suggests is an absolute, not a relative, device. The zero is always "at the same spot". And since it's two-axis, you can also determine your longitudinal pitch, and therefore, with a bit of math, your power...
Regards, Richard.
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#291716 - 03/10/02 07:10 AM
Re: Inclinometer
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Member
Registered: 16/08/02
Posts: 20
Loc: West Virginia
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Originally posted by Xterrian: My power? Okay,okay! Your vehicle's rear-wheel power, then! Regards, Richard.
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