I bought a new SHOCK101 data logger that has the Barnstead ERTO brand on it, came in a Cole-Parmer box, and came with Madgetech software. I don't really know who manufactured this item, but there seems to be a lot of identically named loggers available with different brand names printed on them.
I am in need of a serial communications cable for use with this. At $99 selling price, if I can build one, I would certainly prefer to.
The serial cord, as far as I can see from the Madgetech photos and description, is simply a 9 pin RS232 connector to a 3.5mm stereo headphone plug. I suspect the it is simply wired to Tx, Rx and Gnd, but don't know for sure what goes where. I don't have a cord to trace out and copy. The logger is powered by an internal 9 volt lithium battery.
I did trace out the datalogger's board and found that the phone jack on-board is wired to the PIC16LF872 processor in this way:
Sleeve to pins 19 and 8 (ground) Tip to pin 26 middle connector to pin 21
Is this enough information for someone to assist me in building one of these? Do these pins on this PIC make sense?
This logger is a single PIC processor, 3 ADXL150 accelerometers, 8-24LC256 memory chips, a LT1121-5 regulator, and not much else.
Thanks Jim