This project is a 3-digit digital thermometer easy to build for beginner or hobbyits.PIC16F628 used to read digital value
of temperature from a DS1820 sensor.All 7-segments drived by power logic 8-bit shift register TPIC6B595 with open collector output. For the 7-segment need 12V volt to drive because it have 3 LED per one segment.All segment no need to scan display. Source code programming with CCS C Compiler availible.
2.3 ” Digital thermometer - [Link]