usb data logger for pi

calling to all wiz on this forum. . . .! please help that this logger will be wired to pi md.
and if this type of logger can be wired to pi md's.
posted were:
schematic of usb data logger,
picture of usb data logger,
software for data logger .exe (please download in the download area)(6.10mb)

thanks and regards,

ram,
i tried to upload the datalogger.exe including the usb data logger driver, but it can't. i don't know why,
if somebody want to help that this logger will be wired to pi md's, just post your email and i will send the datalogger.exe with driver.

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http://www.thunting.com/smf/index.php/topic,15182.msg97299.html#msg97299

thanks gd for the info,

regards,
ram

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http://www.thunting.com/smf/index.php/topic,15182.msg97881.html#msg97881

It's not too hard, mate. It's a piece of cake for an embedded systems engineer and programmer. What is too hard is teaching someone how to do it on a forum. I am such an engineer and I have taught this at a university level. I wrote and taught the very first course in high level language programming of embedded systems at Monash University in 1993. That course had a list of prerequisites that would keep you busy for 2 years of hard study. Then, the course itself was 4 months of classroom training.

All that to add a data logger to a metal detector? You bet. It's not for the weak or faint of heart. This isn't a DIY or plug and play feature you are dealing with. In addition to your electronic and programming requirements, you need a computer based data analysis program which means your mathematical knowledge will have to be very high. In other words, what do you do with the data you collect?

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http://www.thunting.com/smf/index.php/topic,15182.msg98043.html#msg98043

Goldnboy, that's all fine but here's an analogy that works well if you think about it.

Get or draw a map of the area you are working. Then go around the ground and grid it by marking it so you can locate where you are finding these targets. Then, as you find them, make a mark on your map and, while you are at it, record all data including signal strength, discrimination and depth. Doing it manually in your mind is one thing. Getting a datalogger to do is is more like the next paragraphs.

First, a device for sensing the exact location of your target is needed. Without it, all you have is a beep "right there" and you need a "beep to some coordinate" system. Latitude and longitude work great so you need a highly accurate GPS to interface to your logger. Now, you need to take that digital information from your detector and make it linked somehow to the location generated by the GPS.

Oops! All you have are beeps, you say? Those aren't digital at all. They're analog. And your detector analysis of target depth and type are also from an analog formula known as a Fast Fourier Transform or FFT for short. Neither of those can be entered directly into a datalogger. So, they must be converted to digital equivalents first. The design of that circuit alone could take months and months because every detector is different. Even if your detector is digital, it still means you have to open it up and gather the data from a variety of locations. Some of those are going to be inside of electronic components forever unavailable to you. Assuming you have all that worked out, you must now have a datalogger that is able to connect these two things together in a manner that allows you to later create a map of your area in a computer. That means making the coordinate data part of the same information that represents your target. That allows you to go back there later. This complicates the data by making it a multiple byte storage solution. With me so far?

That data then has to be moved on to a computer where it will be plotted as an X,Y (and perhaps Z) coordinate map. Whoops! We forgot the orientation. Is it facing North? South? West? We have to know this before we can lay the map out and start digging. You can extrapolate all this from the data by plotting the lat and long on the plot and get a vague notion of the orientation which may be good enough. Writing this software for your computer is unique and not something you can buy from a vendor. Nor is the software for your datalogger.

I still maintain one very important thing. You need to have very high levels of technical skills to add a datalogger to a metal detector. More than can be taught here in a forum like this.

The concept of datalogging is not what I am commenting on here, mate. The concept of using it is terrific. What I am saying is that you cannot simply plug in a datalogger and expect results. The creation of such a marriage is just beyond a casual endeavor. In years gone by, I worked on dataloggers for rockets which required a full set of points in three dimensions. From the ground launch, the acceleration, altitude and location in 3 dimensions were all stored for later retrieval. In addition, those coordinates had to be provided in real time to a camera to print the information digitally on the film.

In the case we are discussing now of metal detecting, the third set of points or depth of target would be that Z axis of the plot I mentioned. It would be kind of handy to know if a garden shovel is needed rather than a backhoe.

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http://www.thunting.com/smf/index.php/topic,15182.msg98075.html#msg98075

		Quote:			Posted by mmlove2007
	what hex??? pleas up hex file

Sure thing. Come back on February 29, 2013 and I'll have it ready for you.

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