This device uses two digital sensors (DS1620 or DS1820), measures the ambient temperature with 0,1 °C (0,2 °F) resolution and displays it on LCD 2×16 (LM016 etc.) screen. It have a clock, which is based on DS1302 timekeeping chip. This chip stores current date and time. The main CPU used in this project is PIC16F877. The additional 8-digit 7 segment LED display can be used. It is based on PIC16F870 microcontroller. RS232C interface is applied to transmit the information from the main CPU to remote LED display. No calibration required!
Main characteristic:
- Displays Inside and Outside Temperature.
- Celsius and Fahrenheit scales selectable.
- Temperature range: -55 °C to 125 °C (-67 °F to 257 °F).
- Temperature resolution: ± 0,1 °C (± 0,2 °F).
- Clock (24-hour format).
- Local LCD display.
- Additional LED display (optional).
- Digital sensors: DS1620 or DS1820 (optional).
- Power supply: DC 9 V from adaptor.
Schematic diagrams:
- original version with DS1620 and DS1820 sensors
- version with DS1620 sensors
- version with DS1820 sensors
Firmware Files
- HEX file (ZIP archive) for main CPU (PIC16F877)
- HEX file (ZIP archive) for LED display controller (PIC16F870)
For more detail: Digital Thermometer and Clock Project (Version 1.0)
About The Author
Ibrar Ayyub
I am an experienced technical writer holding a Master's degree in computer science from BZU Multan, Pakistan University. With a background spanning various industries, particularly in home automation and engineering, I have honed my skills in crafting clear and concise content. Proficient in leveraging infographics and diagrams, I strive to simplify complex concepts for readers. My strength lies in thorough research and presenting information in a structured and logical format.
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