Re: Quick recommendation on easy-to-interface data logging
From: Tom Woodrow (tomwoodrow_at_comcast.net)
Date: 09/29/04
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Date: Wed, 29 Sep 2004 04:23:37 GMT
www.dlpdesign.com
or www.saelig.com
Each have USB to 24 i/o pins and FTDI drivers included each of these
modules is less than < $100.
Tom Woodrow
BEVERNON wrote:
> Hi,
> Haven't done much hardware lately, but used to do quite a bit. I'm a little
> rusty about some low-end interface techniques.
>
> I want to do a data logging application. I will monitor 4 data signals (binary
> values), with a sample rate of approximately 1000 samples per second. I need
> to collect less than 5000 samples. The signal level will be compatible with
> good old TTL logic.
>
> I am looking for a very low cost way to get the data from my sensors (4 single
> bit status pins) into a computer. The computer will be running a 32 bit
> windows os, most likely XP or 2000. A standard Windows application needs to be
> able to read the data, process it, and display an analysis to the user.
>
> The data can go in through the serial port, parallel port, or a USB connection,
> but cannot go in through a custom card (low cost remember). I do NOT want to
> mess with any drivers that I have to develop myself.
>
> Things I have considered include:
> 1) simply connecting to the printer port and kludging a way to read the port
> under windows (not always reliable).
> 2) using a microprocessor to collect and store the data, and transmitting the
> data from the micro to the PC. Could use serial or USB for this.
> 3) simply hooking a high speed UART up to the data pins and running the UART
> constantly. Then connecting the output of the uart to the serial input of the
> PC.
>
> Any suggestions?
>
> Regards,
> Brad
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