I have a Boarduino (it isn't serious, my doctor said it should get better on its own).
I'm trying to interface an infrared temperature sensor I'm salvaging from an inexpensive, Cen-Tech, hand-held remote thermometer. The original unit is inexpensive and sweetly functional. However, I need to output the sensor it has through a TTL/USB cable to a laptop. I need a graphic bar display of the temperature data.
After opening the unit I note a TO5 case device with four leads, one is attached to the case. Looking up from the bottom of the device (where the leads exit) one sees the familiar key tab in order to identify leads. I do not have the manufacturer of the part, much less the data sheet.
If I apply power to the unit and use a digital multimeter I get these voltages (without turning the unit on: from clockwise, starting closest to the tab, 1.9 v., 2.1 v., 1.94 v., and 2.36 v. respectively. I thought I'd get a null, ground voltage from the case lead, which is the fourth clockwise.
I found what I thought was the same device on a website for a Netherlands firm, but now I don't think so. I do know this, however: one lead controls ambient temperature of the device in order to cut down on spurious readings.
I am hoping someone can help me identify which lead is which so I can safely hook it to my Boarduino and get some data piping into my laptop. Any kind of notions or links would be appreciated.
I would also appreciate hints about an adaptable app for windows or linux (Kubuntu's Hardy Heron) to use as a GUI dynamic graphing display.