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Carl's Fluxgate...computer logging
Just recieved my kit from Fat Quarters Software...Wow...it's gonna take some time for me, a layman, to figure out how to build it...but looking down the line a bit...is there any way to have the output sent to a datalogging program on a PC rather than the standard audio output....There seems to be some mention of the capabilty in the paperwork provided... but nothing concrete...also can I hook up a visual output in the form of a digital meter of some sort??? Also if anyone has any advice as to what kind of cable I should use between the towfish and the processor....remembering that it will be towed roughly 40 meters behind a boat....anyone tried this already ?????
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Yup, you can do both. Adding a meter is as simple as adding a buffer to the DAC output and driving the meter. The data logger is more involved. The output of the SCL007 (which is actually a PIC) is a parallel 8-bit word, and can be fed to another PIC which in turns saves to local memory. Program the 2nd PIC to also interface via serial cable to a computer. There are a couple of free programs available to analyze & display the results.
An easier data-logging solution is to build the Mag project from EPE. Unfortunately, I don't have permission to post those articles. See the EPE PIC Mag page in the Mag-Projects section of this web site for more info. At the very least, you could steal the data logging section from this design.
- Carl -
wiring questions
Carl, "they" say that the PC board has pads built in for a data logging option...would those be the 8 pads and holes that exist betwen the SCL007 ad the AD557 ??? Do you have any suggestions as to where to get the PIC parts as well as any advice as to hook it all up so that I can get it to a computer (?) plug??? Also one more quick question about power...right now I have a small radio 9v battery inside the project box...If I am going to have a 150' run to the sensors do I need more 9v "juice"...would you suggest using a smaller 12v battery??? If so, is there any "step down" needed for the 12v...( I rather use 12v as it's easier to find and charge where I'm taking the mag...) Thanks for you time...If anyone reading this has a schematic for the datalogging work that would be great....I'm an "everyday Joe" who is learning about electronics as I work through this project so......bear with me....
THANKS GUYS !!!
SteveComment
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The SCL output is parallel 8-bit data. The DAC converts it to analog to drive the audio. So you can take the 8-bit data and save it to memory, then download the memory to a PC. This sounds simple enough, but involves some circuit development and PIC programming, and is beyond a quick forum reply.
I mentioned a data-logging mag in EPE; the data-logging circuit was actually published in an earlier issue of EPE, as a stand-alone project. That would likely be the best route.
The sensors will not draw much more power at 150' vs 5'. However, use low-capacitance shielded cable for the output lines. A bigger battery is still OK, the circuitry runs off a regulator.
- CarlComment
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data display on LCD
hi sir
I have build the magnetometer given in carl MOreland project usin SCL007 and the audio circuit.
Now I also want to display the data on computer that is change of frequency when a solid rod moved arround the sensor.
(I also have EPE edition with PIC magnetometer).
For data display on LCD i am using 89C51 microcontroller; would this controller is compatoble to support the software given in EPE mag to display the data on computer?
thanks alot
[email protected]
[email protected]
sajjad
Originally posted by Carl-NCComment
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The 89C51 is Atmel, right? The EPE mag software is written for Microchip PICs, so it would need to be modified for Atmel instructions. I have no idea what this involves.
- CarlComment
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EPE mag
I means to say that the programming/software for PC display will be compatible to atmel89C51?
Originally posted by Carl-NCComment
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