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Digital thermometer:

with RS-232 interface

Digital thermometer:
It would be all too easy to describe the DS1620 as a simple temperature sensor: in the present circuit, the device doubles as a thermometer with a wide temperature range, and a programmable thermostat with switching outputs and hysteresis. The DS1620 is coupled to a PIC microcontroller which is programmed to store the digitized temperature, send it to an RS-232 interface, and show it on a bright LED display.
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