Re: Re: homemade data acquisition

I have just surfed the back of some electronics mags and google for some. The ones that have stood out in terms of affordability are availible at <AHREF=http://www.superlogics.com and <AHREF=http://www.serialdaq.com They look to be identical units. The rs-232 unit seem nice because they can be accessed w/ ASCII commands. Though the rs-232 may be slow, it looks like the most promising. I do not know the history or reputation of these products or companies. In the spirit of my old apple ][+ days, I was even thinking of a variation of nabbing data from the "joystick" plug on the board. The apple would give an 8 bit value from 0-255 that could be read within BASIC very easily. There are some great hacks of the I2C bus (Linux drivers availible) that are in this spirit. I have thought about introducing my soldering iron to motherboard. I am really afraid what it may spawn! Some related info can be found at: <ahref=http://voxel.at/prj/ or <ahref=http://www.tk.uni.ac.at/~simon/private/i2c/main.html Really, I am just looking for a cheap and fun way to process external data. I don't really have any specific objectives.

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Re: Re: Re: homemade data acquisition by cacharbe (Curate) on Dec 18, 2001 at 06:11 UTC
I missed the links. What types of data are you going to be acquiring?(Thermocouples? Accelerometers? Timing data?) How many channels? Or do you really have no idea? These things can have a great impact on what whether or not an rs-232 interface will even be worth while (it isn't very fast). My suggestion would be to figure out the test parameters, and then figure out the best interface. Honestly though, if you are just going to be doing slow, single or double channel acquisition, rs-232 is probably your best choice. Feel free to msg me with questions, ideas, etc, I'm more than willing to help out anyway that I can. C-.	[reply]

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Re: Re: Re: homemade data acquisition
by cacharbe (Curate) on Dec 18, 2001 at 06:11 UTC

What types of data are you going to be acquiring?(Thermocouples? Accelerometers? Timing data?) How many channels? Or do you really have no idea? These things can have a great impact on what whether or not an rs-232 interface will even be worth while (it isn't very fast). My suggestion would be to figure out the test parameters, and then figure out the best interface.

Honestly though, if you are just going to be doing slow, single or double channel acquisition, rs-232 is probably your best choice.

Feel free to msg me with questions, ideas, etc, I'm more than willing to help out anyway that I can.

C-.

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