Atmega8515 is selected because it is pin compatible with 8051 Microcontroller. ATmega uses the inbuilt RC oscillator for this project, so select the fuse bits for internal oscillator of 8mhz.
About DS1820
The DS1820 Digital Thermometer provides 9–bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS1820 communicates over a 1-wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C and is accurate to ±0.5°C over the range of –10°C to +85°C. In addition, the DS1820 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.
Circuit Diagram
download bascom code
1 comment:
DS18S20 has a unique 64-bit serial code, which allows multiple DS18S20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18S20s distributed over a large area. It can be used for many applications like temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems. Thanks a lot.
Temperature Labels
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